IEEE 2013 -2012 projects in power electronics,.pdf
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consists of list of ieee projects in power electronics...
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IEEE 2013 2013 -2012 -2012 projects in power power electronics, 2013 ieee ieee projects in power power electronics, IEEE 2013 2013 powe powerr electronics project titles | IEEE projects projects 2013 - 20…
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IEEE pro jects 2013 – 2014, IEEE 2013 – 2012 projects, projec ts, IEEE Software, java IEEE 2013, 2013 DOWNLOAD DOWNLO 2013 - ab, 2014 SOFTWARE TITLE LIST FORPower M.E / B.E / M.Phil Dot neAD net, t, IEEE Matl Matlab, Embedded, electronics, NS2 Projects Projects and Final Final year Projects. 2013 – 2013 – 2014 2014 ieee projects, projects, ieee ie ee 2013- 2012, ieee Projects 2013 for for CSE, IT, IT, MCA, EEE, ECE, NS2, java, java, dot net, Matlab, ieee i eee 2013 Power Power Electronics, Electronics, ieee 2013 Embedded Projects, Latest ieee Projects Projects Titles, IEEE 2013 project title list in trichy, chennai, madurai madurai..
HOME IEEE Projects IEEE Projects 2013 IEEE 2013 JAVA Projects IEEE 2013 Dotnet Pr ojects ojects IEEE Projects 2012 IEEE 2012 JAVA Projects IEEE 2012 Dotnet Projects IEEE Projects 2011 IEEE 2011 JAVA Projects IEEE 2011 Dotnet Projects IEEE Projects 2010 Power Electronics Projects IEEE 2013 Power Electronics Projects www.i eeepr oject.i n/ieee- power - el ectr oni cs- pr oj ects/
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IEEE 2013 2013 -2012 -2012 projects in power power electronics, 2013 ieee ieee projects in power power electronics, IEEE 2013 2013 powe powerr electronics project titles | IEEE projects projects 2013 - 20…
EMBEDDED Projects EMBEDDED Pro jects IEEE 2013 Embedded Projects IEEE 2013 Wireless Projects IEEE IEE E 2013 20 13 El Electrical ectrical Projects IEEE 2013 Web Based Projects IEEE 2013 GSM GPS Projects IEEE IEE E 2013 20 13 Bi Biomedi omedical cal Projects Proje cts IEEE 2013 Consumer Electronics Projects Matlab Projects IEEE 2013 Image Processing Projects IEEE 2013 Power Electronics Projects IEEE 2013 Communication Projects NS2 Projects MBA Projects Mechanical Mechani cal Projects Pr ojects Contact Us
IEEE PROJECTS 2013 – 2012 POWER ELECTRONICS PROJECT TITLES
FOR BASE PAPERS AND ENQUIRY CONTACT : Mr. M. Senthil Kumar CONTACT K umar (+919500090804) Mr. M.S. M .S. Abinesan (+919003012154) (+919003012154) CODE TITLES
PE01 PE01
A Curr Curren entt Cont Control roller Design for Current Source Inverter-Fed AC Machine Drive System
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ABSTRACT
IEEE YEAR
Abstract—A Abstract— A current source inverter nverter (CSI) (CS I) IEEE 2013 requires a capacitor filter for the commutation of switching device as well as for attenuating switching switching harmonics. harmonics. Hence, the CSICS I-fed fed ac machine has a second-order system in the continuous continuous time time domai do main. n. This This paper pa per presents pre sents a design methodology for the closed-loop current controller of the CSI-fed ac machine drive 2/55
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IEEE 2013 2013 -2012 -2012 projects in power power electronics, 2013 ieee ieee projects in power power electronics, IEEE 2013 2013 powe powerr electronics project titles | IEEE projects projects 2013 - 20…
EMBEDDED Projects EMBEDDED Pro jects IEEE 2013 Embedded Projects IEEE 2013 Wireless Projects IEEE IEE E 2013 20 13 El Electrical ectrical Projects IEEE 2013 Web Based Projects IEEE 2013 GSM GPS Projects IEEE IEE E 2013 20 13 Bi Biomedi omedical cal Projects Proje cts IEEE 2013 Consumer Electronics Projects Matlab Projects IEEE 2013 Image Processing Projects IEEE 2013 Power Electronics Projects IEEE 2013 Communication Projects NS2 Projects MBA Projects Mechanical Mechani cal Projects Pr ojects Contact Us
IEEE PROJECTS 2013 – 2012 POWER ELECTRONICS PROJECT TITLES
FOR BASE PAPERS AND ENQUIRY CONTACT : Mr. M. Senthil Kumar CONTACT K umar (+919500090804) Mr. M.S. M .S. Abinesan (+919003012154) (+919003012154) CODE TITLES
PE01 PE01
A Curr Curren entt Cont Control roller Design for Current Source Inverter-Fed AC Machine Drive System
www.i eeepr oject.i n/ieee- power - el ectr oni cs- pr oj ects/
ABSTRACT
IEEE YEAR
Abstract—A Abstract— A current source inverter nverter (CSI) (CS I) IEEE 2013 requires a capacitor filter for the commutation of switching device as well as for attenuating switching switching harmonics. harmonics. Hence, the CSICS I-fed fed ac machine has a second-order system in the continuous continuous time time domai do main. n. This This paper pa per presents pre sents a design methodology for the closed-loop current controller of the CSI-fed ac machine drive 2/55
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IEEE 2013 2013 -2012 -2012 projects in power power electronics, 2013 ieee ieee projects in power power electronics, IEEE 2013 2013 powe powerr electronics project titles | IEEE projects projects 2013 - 20…
system. A mul multiloo tiloop p current controll co ntroller er desig de sign n using a pole/zero cancellation method is employed with a transfer tra nsfer function function matrix. To decouple the crosscoupling terms which cause mutual mutual interferences nterference s between bet ween the dand da nd q-axes q- axes in the synchronous reference refere nce frame, two types of controll co ntroller er are propo pro posed sed and and implemented implemented using different decoupling method. Additionally, active damping methods are inco incorpo rporate rated d to enhance the stability stability of the the system. A stabil stab iliity analysis in discre discretet tetim imee domain do main is invest investig igate ated d to verify the feasibility of the proposed closedloop oo p current controll co ntroller. er. To To evaluate evaluate the effectiveness of the proposed current controller, computer simulations and experimental tests were performed performed and the results results are discussed. discussed. PE02 PE02
A DC–D C–DC Con Convert erter Abstract—Th Abstract— Thiis paper pap er presents prese nts a pulsewidth pulsewidth IEEE 2013 Based on the Three-State modulation dc–dc nonisolated buck converter Switching Cell for High using using the three- state switching switching cell, cell, constituted constituted Current Curr ent and Voltage by two two activ active switch switches, es, two two diodes, diodes, and and two two StepStep - Down Application Applicationss coupled inductors. Only part of the load power is processed processe d by the active active switches, switches, reducing reducing the peak peak current through through the switches to half half of the load current, as higher power levels can then be achi achieved eved by the the proposed topology topology.. The The volume of reactive elements, i.e., inductors and capacitors, is also decreased since the ripple frequency of the output voltage is twice the switching frequency. Due to the intrinsic characteristics characteristics of o f the the topology to pology,, total to tal losses losses are distributed among all semicond semiconductors uctors.. Another advantage of this converter is the reduced region for discontinuous discontinuous conduction conduction mode od e when compared to the conventi conventional onal buck converter or, in other words, the operation range in continuous continuous conduction cond uction mode is incre increase ased, d, as demonstrated by the static gain plot. The theoretical theore tical appro ap proach ach is detail de tailed ed through qualitative and quantitative analyses by the appli app lication cation of the three- state switching switching cell to the buck converter opera op eratin ting g in nonoverlappi nonoverlapp ing mode (D < 0.5). Besides, the mathematical analysis analysis and devel de velop opmen mentt of an experi exper imental prototy prototype rated rated at 1 kW are are carri carried out. out. The The main experimental results are presented and
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IEEE 2013 2013 -2012 -2012 projects in power power electronics, 2013 ieee ieee projects in power power electronics, IEEE 2013 2013 powe powerr electronics project titles | IEEE projects projects 2013 - 20…
adequate ade quately ly discussed to clear clearly ly identify identify its claimed advantages. PE03 PE03
A High Step Step-D -Dow own n Transformerless SingleSingleStage Single-Switch AC/DC Converter Converter
Abstract—Th Abstract— Thiis paper pap er presents prese nts a high high stepIEEE 2013 down tranformerless single-stage single-switch ac/dc converter suitable for universal line application applicationss (90–270 (90– 270 Vrms Vrms ). The The topol topo logy integrates a buck-type power-factor correction (PFC) (PF C) cell with with a buck–boost buck–b oost dc/dc cell and part of the the in input power is is coupl coupled ed to the the outpu outputt directly after the first power processing. With this this direct power transfer feature and sharing sharing capacitor voltages, the converter is able to achieve effi efficient power po wer conversion, high high power po wer factor, low low voltage stress stre ss on intermediate intermediate bus (less than 130 V) and low output voltage without a hi high step-down step- down transformer. transformer. The The absence of transformer transformer reduces the the component component counts and cost of the converter. Unlike most of the boosttype PFC cell ce ll,, the the main main switch of the propo pro posed sed converter only handles the peak inductor current of dc/dc cell rather than the superposition of both inductor nductor curren currents. ts. Detai Detailled anal analys ysiis and and design procedures of the proposed circuit are given given and verified verified by exper experim imenta entall results. results.
PE04 PE04
A High Ste Step-Up p-Up Converter With a Voltage Multiplier Module for a Photovoltaic System
Abstract Abstr act—Anovel —Anovel high high stepstep - up converter converte r is IEEE 2013 proposed for for a fron fronten tend d photovol photovoltai taicc system system.. Through a voltage multiplier module, an asymmetrical asymmetrical interleaved high high stepstep - up converter co nverter obtains high stepup gain without operating at an extreme extre me duty ratio. ratio. The voltage multi multiplier plier module is composed of a conventional boost converter and coupled inductors. inductors. An extra conventional boost boost converter is is integrate integrated d into into the first phase to achieve a considerably higher voltage voltage conversion conversion ratio. The The two-phase two- phase configu configuration ration not only reduces red uces the the current stress stre ss through each power switch, but also constrains the input input current ripple, which which decre de crease asess the conduction losses of metal–oxide– semicond semiconductor uctor fieldfield-eff effect ect transistors (MOSFETs). In addition, the proposed converter converte r functions functions as an active clamp clamp circuit, circuit, which which allevi alleviates ates large voltage spikes across acr oss the power switch switches. es. Th Thus, the the low-vol low-voltag tage-rated e-rated
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IEEE 2013 2013 -2012 -2012 projects in power power electronics, 2013 ieee ieee projects in power power electronics, IEEE 2013 2013 powe powerr electronics project titles | IEEE projects projects 2013 - 20…
MOSFETs MOS FETs can be adopted ado pted for reductions reductions of conduction losses and cost. Efficiency improves because because the the energ energy y stored stored in in leakage eakage inductances is recycled to the output terminal. Finally, the prototype circuit with a 40-V input voltag voltage, e, 380-V 380- V output, output, and and 1000- W output output power is operated operated to veri veriffy its perf performan ormance. ce. The The highest highest efficiency efficiency is 96.8 96 .8%. %. PE05 PE05
A Hig High-Perf -Perform ormance ance SPWM Controller for Three-Phase UPS Systems O perating pe rating Under Highl Highly y Nonli Nonlinear Loads Loads
PE06 PE06
A New New Con Control Meth ethod Abst bstract act—In —In out outdoor door light-emi -emitting diod diodee
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Abstract—Th Abstract— Thiis paper pap er presents the design design of a IEEE 2013 high high-- performance per formance sinusoidal sinusoidal pul p ulsewidth sewidth modulation (SPWM) controller for threephase unin uninterr terruptibl uptiblee power po wer supply (UPS) (UPS ) systems that are operating under highly nonlinear loads. The classical SPWM SP WM method method is quite effective effective in controlling the RMS magnitude of the UPS output voltages. However, it is not good enough in compensatin compensating g the harmonics harmonics and the distortion caused specifically by the nonlinear currents drawn by the rectif rec tifiier loa loads. ds. The The distortion becomes more severe at high power where the switching switching frequency has to be reduced due to the efficiency concerns. This study proposes a new design strategy that overcomes overc omes the limitati imitations ons of the classical RMS control. It adds inner loops to the closed-loop control contro l system effect effectiively that enables successful reduction of harmonics and compensation compe nsation of distortion at the outputs. Simulink is used to analyze, develop, and design the controller using the state-space model of the invert inverter. er. The contro co ntroll ller er is is implemented implemented in the TMS320F2808 DSP by Texas Instruments, and the performance pe rformance is evaluated evaluated experimentally using a three-phase 10 kVA transformer isolated UPS unde underr all types of load oad conditions. conditions. In concl co nclusi usion, on, the experim expe rimental ental results demonstrate that the controller successfu succes sfull lly y achieves the steadystea dy-state state RMS voltage regulation specifications as well as the total tota l harmonic harmonic distor distortion tion and the dynamic dynamic response respo nse requi req uiremen rements ts of o f major major UPS standards standa rds.. (Index (Inde x Terms—Inverter, Terms—Inverter , nonlin nonlinear ear load, sinusoidal pulsewidth modulation (PWM) control, uninterruptible power supply (UPS).) IEEE 2013 2013 5/55
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
of Interleaved Single-Stage Flyback AC–DC Converter for Outdoor LED Lighting Systems
PE07
(LED) lighting systems, there are a lot of applications. Depending on the output power rating, the power stage to drive an LED can be classified into single-stage and two-stage structures. The single-stage structure is for low power LED lighting applications. However, it is difficult to apply at over 60–70 W of output power because of its low efficiency and huge transformer at high power. On the other hand, the two-stage structure is usually used for high power applications. However, it is undesirable to cover wide output power range because of its poor power factor (PF) under the light load condition. To solve these problems, this paper proposes a new pulse duty cycle control method with pulse frequency modulation for an interleaved single-stage flyback ac–dc converter. The proposed converter provides high efficiency under heavy loads with low ac line condition and under light loads with high ac line condition. In addition, the proposed converter shows high PF and low total harmonic distortion even when the output power is very low. As a result, a single LED ac–dc converter can cover wide power range for outdoor LED lighting applications. To verify the validity of the proposed converter, an 81-W prototype converter has been implemented and experimented on. (Index Terms—Frequency control, interleaved flyback, lightemitting diode (LED), power factor correction (PFC), singlestage, total harmonic distortion (THD).)
A New DC Anti-Islanding Abstract—This paper proposes a photovoltaic IEEE 2013 Technique of Electrolytic (PV) generation system interfaced with a dc Capacitor-Less distribution system. DC interface allows for the Photovoltaic Interface in improvement of system efficiency by fully DC Distribution Systems utilizing dc-based renewable sources and storage devices. In this paper,issues on PV interface for dc distribution systems are discussed for energy-efficient and reliable system implementation. AC and dc PV interfaces are mathematically analyzed. In dc distribution, eliminating electrolytic capacitors in PV interfaces improves system reliability, increases
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system efficiency, and reduces cost. In addition, this paper proposes a new anti-islanding technique for dc distribution as a system protection scheme. The operating principle is presented in detail and analysis shows that the proposed injected current perturbation technique is an effective solution for anti-islanding operation. A prototype converter features a simple structure with no electrolytic capacitor, which ensures a longer lifetime of the PV power circuit. Experimental results of the prototype circuit show a maximum efficiency of 98.1% and a European efficiency of 97.5%. The proposed anti-islanding technique shows fast response to the islanding condition in less than 0.2 s. It also shows that the average maximum power point tracking efficiency is 99.9% in normal conditions, which verifies the performance of the proposed scheme. (Index Terms—Anti-islanding, building integrated photovoltaic (BIPV), dc distribution, islanding, photovoltaic (PV).) PE08
A Single-Phase GridConnected Fuel Cell System Based on a BoostInverter
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Abstract—In this paper, the boost-inverter IEEE 2013 topology is used as a building block for a single-phase grid-connected fuel cell (FC) system offering low cost and compactness. In addition, the proposed system incorporates battery-based energy storage and a dc–dc bidirectional converter to support the slow dynamics of the FC. The single-phase boost inverter is voltage-mode controlled and the dc– dc bidirectional converter is current-mode controlled. The low-frequency current ripple is supplied by the battery whichminimizes the effects of such ripple being drawn directly from the FC itself.Moreover, this system can operate either in a grid-connected or stand-alone mode. In the grid-connected mode, the boost inverter is able to control the active (P) and reactive (Q) powers using an algorithm based on a second-order generalized integrator which provides a fast signal conditioning for single phase systems. Design guidelines, simulation, and experimental results taken from a laboratory prototype are presented to confirm the 7/55
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
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PE10
performance of the proposed system. (Index Terms—Boost inverter, fuel cell, grid-connected inverter, power conditioning system (PCS), PQ control.) A Three-Level Converter Abstract—This paper proposes a pulse-width IEEE 2013 With Reduced Filter Size modulation threelevel converter with reduced Using Two Transformers filter size using two transformers. The proposed and Flying Capacitors converter hasmany advantages. All switches sustain only the half of the input voltage and since the secondary rectified voltage is a three-level waveform, the output filter inductor can be reduced. Also, because of the power sharing of transformer and reduced output inductor, high efficiency can be obtained. The operational principle, analysis, and design considerations of the proposed converter are presented in this paper. The validity of this study is confirmed by the experimental results from a prototype with 600W, 500–600V input, and 60V output. (Index Terms—Reduced filter size, three-level converter.) Adaptive Dead-Time Abstract—This study presents a new software- IEEE 2013 Compensation for Grid- based plug-in dead-time compensator for gridConnected PWM Inverters connected pulsewidth modulated voltage-source of Single-Stage PV inverters of single-stage photovoltaic (PV) Systems systems using predictive current controllers (PCCs) to regulate phase currents. First, a nonlinear dead-time disturbance model is reviewed, which is then used for the generation of a feed-forward compensation signal that eliminates the current distortion associated with current clamping effects around zero-current crossing points. A novel closed-loop adaptive adjustment scheme is proposed for fine tuning in real time the compensation model parameters, thereby ensuring accurate results even under the highly varying operating conditions typically found in PV systems due to insolation, temperature, and shadowing effects, among others. The algorithm implementation is straightforward and computationally efficient, and can be easily attached to an existent PCC to enhance its dead-time rejection capabilitywithout modifying its internal structure. Experimental results with a 5-kW PV system
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prototype are presented. (Index Terms— Current-controlled voltage-source inverter (CCVSI), dead-time compensation, gridconnected pulsewidth modulated (PWM) inverter, harmonic distortion, predictive current control (PCC), single-stage photovoltaic (PV) system.) Adaptive Theory-Based Abstract—This paper presents a hardware IEEE 2013 Improved Linear Sinusoidal implementation of three-phase distribution static Tracer Control Algorithm compensator (DSTATCOM) using an adaptive for DSTATCOM theory-based improved linear sinusoidal tracer (ILST) control algorithm for different functions of DSTATCOM such as reactive power compensation for power factor correction, harmonics elimination, load balancing, and zerovoltage regulation under linear/nonlinear loads.AnILST-based control algorithm is used for the extraction of fundamental load currents and their active and reactive power components. These components are used for the estimation of reference source currents. A prototype of DSTATCOM is developed and its real-time performance is studied using a digital signal processor. The performance of DSTATCOM is found satisfactory with the proposed control algorithm under various types of loads. (Index Terms—Improved linear sinusoidal tracer (ILST) control algorithm, power factor correction (PFC), power quality, reactive power, voltage source converter (VSC), zero voltage regulation (ZVR).) Adaptive Voltage Control Abstract—In the case of photovoltaic (PV) IEEE 2013 of the DC/DC Boost Stage systems, an adequate PV voltage regulation is in PV Converters With fundamental in order to both maximize and limit Small Input Capacitor the power. For this purpose, a large input capacitor has traditionally been used. However, when reducing that capacitor’s size, the nonlinearities of the PV array make the performance of the voltage regulation become highly dependent on the operating point. This paper analyzes the nonlinear characteristics of the PV generator and clearly states their effect on the control of the dc/dc boost stage of commercial converters by means of a linearization around the operating point. Then, it
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proposes an adaptive control, which enables the use of a small input capacitor preserving at the same time the performance of the original system with a large capacitor. Experimental results are carried out for a commercial converter with a 40 μF input capacitor, and a 4 kWPV array. The results corroborate the theoretical analysis; they evidence the problems of the traditional control, and validate the proposed control with such a small capacitor. (Index Terms—Adaptive control, photovoltaic converters, photovoltaic power systems, small-signal modeling, voltage control.) PE13
An Adaptive Output Current Estimation Circuit for a Primary-Side Controlled LED Driver
Abstract—A primary-side controlled method is IEEE 2013 commonly used in flyback LED driver to regulate output current by employing an auxiliary winding. However, owing to intrinsic propagation delay in real-world circuits, a primary-side controlled flyback converter experiences a worse line regulation. This paper proposes a smart output current estimation scheme to improve line regulation for constant on-time control, and it can be compatible with the current flyback topology. A 9.5-W prototype of the proposed flyback LED driver has been fabricated in Nuvoton Technology Corporation 0.6-μm 5-V/40-V CMOS process. The maximum switching frequency is set to around 100 kHz with universal-line input, single-stage power factor correction for LED lighting applications. Experimental results prove that the proposed scheme can improve the line regulation within 1.5% and the power efficiency can be up to 89.7%. (Index Terms—Flyback converter, light-emitting diode (LED) driver, line regulation, primary-side controlled.)
PE14
An Optimal Control Method for Photovoltaic Grid-Tied-Interleaved Flyback Microinverters to Achieve High Efficiency in Wide Load Range
Abstract—Boundary conduction mode (BCM) IEEE 2013 and discontinuous conduction mode (DCM) control strategies are widely used for the flyback microinverter. The BCM and DCM control strategies are investigated for the interleaved flyback microinverter concentrating on the loss analysis under different load conditions. These two control strategies have
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different impact on the loss distribution and thus the efficiency of the flyback microinverter. For the interleaved flyback microinverter, the dominant losses with heavy load include the conduction loss of the powerMOSFETs and diodes, and the loss of the transformer; while the dominant losses with light load include the gate driving loss, the turn-off loss of the power MOSFETs and the transformer core loss. Based on the loss analysis, a new hybrid control strategy combing the two-phase DCM and one-phaseDCMcontrol is proposed to improve the efficiency in wide load range by reducing the dominant losses depending on the load current. The optimal design method based on the boundary condition of the hybrid control is also presented. The experimental results verify the benefits of the proposed control. (Index Terms—AC module, grid-connected, interleaved flyback, microinverter, photovoltaic (PV).) PE15
Analysis and Comparison Abstract—Offshore wind farm with an internal IEEE 2013 of Medium Voltage High medium-voltage dc (MVDC)-grid collection Power DC/DC Converters connected HVDC transmission may be an for Offshore Wind Energy option to harvest offshore wind energy. HighSystems power MV dc/dc converters with high-step-up conversion ratios are the key components for the internal MVDC grid. In this paper, a highefficiency step-up resonant switchedcapacitor converter for offshore wind energy system is studied, which is characterized by the soft-switching condition for all switches and diodes. This significantly reduces switching losses and higher switching frequency is feasible to reduce the overall system volume and weight. The comparisons with other two kinds of topologies are also presented; moreover, the possible specification requirements of high power MV dc/dc converters are analyzed and set. The operation principle of the proposed converter has been successfully verified by simulation and experiment results. (Index Terms—High power, medium-voltage dc (MVDC) converter, MVDC grid, offshore wind farm.)
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PE16
Analysis and Design of a Push–Pull Quasi-Resonant Boost Power Factor Corrector
Abstract—This paper proposes a novel IEEE 2013 power-factor corrector (PFC), which is mainly composed of two-phase transition-mode (TM) boost-type power-factor correctors (PFCs) and a coupled inductor. By integrating two boost inductors into one magnetic core, not only the circuit volume is reduced, but also the operating frequency of the core is double of the switching frequency. Comparing with single-phase TM boost PFC, both the input and output current ripples of the proposed PFC can be reduced if the equivalent inductance of the coupled inductor equals the inductance of singlephase TM boost PFC. Therefore, both the powerfactor value and the power density are increased. The proposed topology is capable of sharing the input current and output current equally. A cut-inhalf duty cycle can reduce the conduction losses of the switches and both the turns and diameters of the inductor windings. The advantages of aTMboost PFC, such as quasi-resonant (QR) valley switching on the switch and zero-current switching (ZCS) of the output diode, are maintained to improve the overall conversion efficiency. Detailed analysis and design procedures of the proposed topology are given. Simulations and experiments are conducted on a prototype with a universal line voltage, a 380-V output dc voltage and a 200-W output power to verify its feasibility. (Index Terms—Coupled inductor, power factor corrector, push– pull topology, quasi-resonant (QR) converter.)
PE17
Analysis of a Fifth-Order Resonant Converter for High-Voltage DC Power Supplies
Abstract—Power transformer is one of the IEEE 2013 most complex parts of power converters. The complicated behavior of the transformer is usually neglected in the power converter analysis and a simple model is mostly used to analyze the converter. This paper presents a precise analysis of a fifth-order resonant converter which has incorporated the resonant circuit into the transformer. The derived model, which is based on the accurate model of the power transformer, can fully predict the behavior of the fifth-order resonant converter.
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The proposed fifth-order resonant converter is able to effectively reduce the range of phaseshift angle fromno load to full load for a fixedfrequency phase-shift control approach. Therefore, the converter is able to operate under zero voltage switching during entire load range with a fixed-frequency control method. Also, the proposed converter offers a high gain which leads to a lower transformer turns ratio. A 10-kVDC, 1.1-kW prototype has been prepared to evaluate the performance of the proposed converter. The experimental results exhibit the excellent accuracy of the proposed model and the superiority of the performance compared to the lower order resonant converters, especially for high-voltage applications. (Index Terms—Fifth-order resonant converter, high-voltage dc power supply, phase-shift fixed-frequency control approach, steady state analysis, zero voltage switching (ZVS) operation.) PE18
Analysis, Design, and Experimental Results of a Novel Soft-Switching Snubberless Current-Fed Half-Bridge Front-End Converter-Based PV Inverter
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Abstract—This paper proposes a new novel IEEE 2013 snubberless currentfed half-bridge front-end isolated dc/dc converter-based inverter for photovoltaic applications. It is suitable for gridtied (utility interface) as well as off-grid (standalone) application based on the mode of control. The proposed converter attains clamping of the device voltage by secondary modulation, thus eliminating the need of snubber or active-clamp. Zero-current switching or natural commutation of primary devices and zero-voltage switching of secondary devices is achieved. Soft-switching is inherent owing to the proposed secondary modulation and is maintained during wide variation in voltage and power transfer capacity and thus is suitable for photovoltaic (PV) applications. Primary device voltage is clamped at reflected output voltage, and secondary device voltage is clamped at output voltage. Steady-state operation and analysis, and design procedure are presented. Simulation results using PSIM 9.0 are given to verify the proposed analysis and design. An experimental converter prototype rated at 200 13/55
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
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W has been designed, built, and tested in the laboratory to verify and demonstrate the converter performance over wide variations in input voltage and output power for PV applications. The proposed converter is a true isolated boost converter and has higher voltage conversion (boost) ratio compared to the conventional active-clamped converter. (Index Terms—Current-fed converter, high frequency, photovoltaic (PV) inverter, renewable energy system, soft-switching.) Application and Stability Abstract—This paper presents a novel IEEE 2013 Analysis of a Novel Digital technique to suppress common-mode Active EMI Filter Used in a electromagnetic interference (EMI) using a Grid-Tied PV digital active EMI filter (DAEF). The DAEF Microinverter Module control technique is concurrently implemented with a digital controller of a grid-tied photovoltaic microinverter. A brief description of the microinverter architecture and its inverter circuit is illustrated. The inverter stability is investigated using the overall transfer function. Accordingly, the system compensation is designed based on the direct quadrant (DQ) reference frame control technique. Finally, the proposed digital controller is tested on a gridconnected 200-W dc–ac microinverter. The experiment results validate the effectiveness of the proposed technique. Compared with the conventional passive EMIfilter, the proposed digital controller can achieve an equivalent or better performance in terms of EMI suppression and maintain stability within the operation bandwidth. Therefore, the embedded DAEF can significantly reduce the size, cost, and space of the overall power inverter printed circuit board without the need of a conventional passive EMI filter. (Index Terms—Digital filters, electromagnetic compatibility (EMC), electromagnetic interference (EMI) suppression, microinverter, photovoltaic (PV).) Asymmetric Control of Abstract—It is important to improve the overallIEEE 2013 DC-Link Voltages for efficiency of a photovoltaic (PV) inverter when Separate MPPTs in Three- it is connected to the grid. Fundamentally, the Level Inverters conversion efficiency from dc to ac power of an inverter is important. However, in the
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
presence of partial shading, maximum power point tracking (MPPT) on PV modules is more important than the conversion efficiency. In this paper, a new control method for a three-level inverter is proposed.With the proposed method, each dc-link voltage of the three-level inverter can be asymmetrically regulated. When PV modules are split into two and each split module is connected to the respective dc-link capacitors of the inverter, the asymmetric control can be helpful because separateMPPTs are possible. The effectiveness of the proposed method was examined through experiments with a T-type three-level inverter, where each dclink capacitor was supplied by a PVsimulator emulating two separate PVmodules under different shading conditions. (Index Terms— Asymmetric voltage control, grid-connected inverter, maximum power point tracking (MPPT), photovoltaic (PV), three-level inverter.) PE21
Battery/Supercapacitors Combination in Uninterruptible Power Supply (UPS)
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Abstract—This study presents a study of the IEEE 2013 reduction in battery stresses by using supercapacitors (SCs) in a 500-kVA rated UPS. We aim at investigating the optimal supercapacitors-battery combination versus the SCs cost. This investigation is threefold; first, supercapacitors and battery models developed using MATLAB/Simulink are presented and validated. Second, the architecture and the simulation of the designed system that combines the SCs and the battery are shown. The supercapacitors are used as high-power storage devices to smooth the peak power applied to the battery during backup time and to deliver full power during short grid outages. By charging the SCs through the battery at a suitable rate, all impulse power demands would be satisfied by the supercapacitors. Third, extensive simulations are carried out to determine the gain in batteryRMS current, the gain in energy losses, the energy efficiency and the elimination rate of surge load power. These four performance parameters are determined by simulation and then analyzed. The influence of the SCs 15/55
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recharge on the performance indicators is highlighted. A thorough analysis involving optimal study proposes to draw the optimal SCs number and filter constant from the variation of the aforementioned parameters versus the cost of the SCs. (Index Terms—Hybrid power sources, lead-acid battery, supercapacitors, uninterruptible power supply (UPS).) PE22
Bridgeless SEPIC Converter With a RippleFree Input Current
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Cascaded Multicell Trans- Abstract—Inverters with high-output voltage IEEE 2013 Z-Source Inverters gain usually face the problem of high-input current flowing through their components. The problem might further be exaggerated if the inverters use high-frequency magnetic devices like transformers or coupled inductors. Leakage inductances of these devices must strictly be small to prevent overvoltages caused by switching of their winding currents. To avoid these related problems, cascaded trans-Zsource inverters are proposed. They use multiple magnetic cells in an alternately cascading
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Abstract—Conventional power factor IEEE 2013 correction (PFC) singleended primary inductor converter (SEPIC) suffers from high conduction loss at the input bridge diode. To solve this problem, a bridgeless SEPIC converter with ripple-free input current is proposed. In the proposed converter, the input bridge diode is removed and the conduction loss is reduced. In addition, the input current ripple is significantly reduced by utilizing an additional winding of the input inductor and an auxiliary capacitor. Similar to the conventional PFC SEPIC converter, the input current in a switching period is proportional to the input voltage and near unity power is achieved. The operational principles, steady-state analysis, and design equations of the proposed converter are described in detail. Experimental results from a 130Wprototype at a constant switching frequency of 100 kHz are presented to verify the performance of the proposed converter. (Index Terms—Bridgeless converter, coupled inductor, power factor correction (PFC), single-ended primary inductor converter (SEPIC).)
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pattern rather than a single magnetic cell with large turns ratio. Simulation and experimental results have shown that the multicell inverters can produce the same high-voltage gain, while keeping currents and voltages of the components low. The inverters can also step down their output voltages like a traditional voltage-source inverter without compromising waveform quality. (Index Terms—Cascaded inverters, coupled inductors, highfrequency magnetic, transformers, Z-source inverters.) PE24
Class-D/DE Dual-ModeOperation Resonant Converter for ImprovedEfficiency Domestic Induction Heating System
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Common-Mode Voltage Abstract—Common-mode voltages (CMVs) Reduction Methods for can lead to premature failure of the motor Current-Source Converters insulation system in medium-voltage current-
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Abstract—Induction heating (IH) technology is IEEE 2013 nowadays widely present in domestic appliances because of its cleanness, high efficiency, and faster heating process. All of these advantages are due to its heating process, where the pot is directly heated by the induced currents generatedwith a varyingmagnetic field.As a result, the glass where the pot is supported is not directly heated and, consequently, efficiency and heating times are improved. IH systems are based on dc-link inverters to generate the required alternating current to feed the inductor. Usually, resonant converters are used to achieve higher efficiencies and power densities. In such systems, themaximum output power and efficiency are achieved at the resonant frequency, and the switching frequency is increased to reduce the output power. As a consequence, in these converters, the efficiency is also reduced in the low-medium output power range. This paper proposes the use of the half bridge inverter in two operating modes to achieve higher efficiency in a wide output power range. The power converter topology can be reconfigured by changing the resonant capacitors through electromechanical relays. As a consequence, the entire efficiency of the cooking process is improved with a costeffective procedure.(Index Terms—Induction heating (IH), inverter, resonant power conversion.) IEEE 2013
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in Medium-Voltage Drives source-fed drives. By analyzing the CMV values at all switching states under different operating conditions of a currentsource-inverter (CSI) based motor drive, this paper first indicates that the CMV peaks are produced by the zero states in most of the cases. The nonzero- state (NZS) modulation techniques employed in voltagesource converters are adapted for use in a spacevector- modulated current-source converter (CSC) to reduce the CMV magnitude. For NZS modulation in CSCs, the nearest threestate (NTS) modulation sequences are designed with good loworder harmonic performances in their linear modulation region of ma ≥ 0.67 and with no increase in the device switching frequency. A combined active-zerostate (AZS) modulation technique is also proposed as compensation, for a lower modulation index in the range of 0.4–0.67, when a compromise is made between the dc- link current minimization and high input power factor control. The simulation and experimental results are provided to validate the CMV reduction effects and harmonic performances of the NTS and combined AZS modulation methods in CSI-fed drives. (Index Terms—Active-zerostate (AZS) modulation, commonmode voltage (CMV), current-source converter (CSC), nearest three-state (NTS) modulation, nonzero-state (NZS) modulation.) PE26
Control of Improved Full- Abstract—This paper presents an improved IEEE 2013 Bridge Three-Level full-bridge threelevel (IFBTL) dc/dc converter DC/DC Converter for for a wind turbine in a dc grid by inserting a Wind Turbines in a DC passive filter into the dc/dc converter to Grid improve the performance of the converter. The passive filter can effectively reduce the voltage stress of the medium frequency transformer in the IFBTL dc/dc converter. A modulation strategy, including two operation modes, is proposed for the IFBTL dc/dc converter. Then, a voltage balancing control strategy is proposed for the IFBTL dc/dc converter. Furthermore, the control of thewind turbine based on the IFBTL dc/dc converter in a dc-grid system is presented. Finally, a small-scale IFBTL dc/dc
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converter prototype was built and tested in the laboratory, and the results verify the theoretical analysis. (Index Terms—DC/DC converter, dc grid, full-bridge three-level (FBTL), permanentmagnet synchronous generator, wind turbines.) PE27
DC-Voltage Fluctuation Elimination Through a DCCapacitor Current Control for DFIG Converters Under Unbalanced Grid Voltage Conditions
Abstract—Unbalanced grid voltage causes a IEEE 2013 large second-order harmonic current in the dclink capacitors as well as dc-voltage fluctuation, which potentially will degrade the lifespan and reliability of the capacitors in voltage source converters. This paper proposes a novel dccapacitor current control method for a grid-side converter (GSC) to eliminate the negative impact of unbalanced grid voltage on the dccapacitors. In this method, a dccapacitor current control loop,where a negative-sequence resonant controller is used to increase the loop gain, is added to the conventional GSC current control loop. The rejection capability to the unbalanced grid voltage and the stability of the proposed control system are discussed. The second-order harmonic current in the dc capacitor as well as dc-voltage fluctuation is very well eliminated. Hence, the dc capacitors will be more reliable under unbalanced grid voltage conditions. A modular implementation method of the proposed control strategy is developed for the DFIG controller. Finally, experiments are presented to validate the theoretical analysis. (Index Terms—Control analysis, dccapacitor current, doubly fed induction generator (DFIG), resonant controller, unbalanced grid voltage.)
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Design and Implementation of Energy Management System With Fuzzy Control for DC Microgrid Systems
Abstract—This paper presents the design and IEEE 2013 implementation of an energy management system (EMS) with fuzzy control for a dc microgrid system.Modeling, analysis, and control of distributed power sources and energy storage devices withMATLAB/Simulink are proposed, and the integrated monitoring EMS is implemented with LabVIEW. To improve the life cycle of the battery, fuzzy control manages the desired state of charge. The RS-485/ZigBee network has been designed to control the
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operating mode and to monitor the values of all subsystems in the dc microgrid system. (Index Terms—Energy management system (EMS), fuzzy control, microgrid.) PE29
Design Methodology for a Abstract—This paper introduces a IEEE 2013 Very High Frequency designmethodology for a resonant boost Resonant Boost Converter converter topology that is suitable for operation at very high frequencies. The topology we examine features a low parts count and fast transient response, but suffers from higher device stresses compared to other topologies that use a larger number of passive components.Anumerical design procedure is developed for this topology that does not rely on time-domain simulation sweeps across parameters. This allows the optimal converter design to be found for a particular main semiconductor switch. If an integrated power process is used where the designer has control over layout of the semiconductor switch, the optimal combination of converter design and semiconductor layout can be found. To validate the proposed converter topology and design approach, a 75- MHz prototype converter is designed and experimentally demonstrated. The performance of the prototype closely matches that predicted by the design procedure, and the converter achieves good efficiency over a wide input voltage range. (Index Terms—DC-DC power converters, power transistors, RLC circuits, schottky diodes, tuned circutis.)
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Design Optimization of Transformerless GridConnected PV Inverters Including Reliability
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Abstract—This paper presents a new IEEE 2013 methodology for optimal design of transformerless photovoltaic (PV) inverters targeting a cost-effective deployment of gridconnected PV systems. The optimal switching frequency as well as the optimal values and types of the PV inverter components is calculated such that the PV inverter LCOE generated during the PV system lifetime period is minimized. The LCOE is also calculated considering the failure rates of the components, which affect the reliability performance and lifetime maintenance cost of the PV inverter. A design example is presented, demonstrating that 20/55
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Design, Analysis, and Implementation of Solar Power Optimizer for DC Distribution System
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Development and Operational Control of Two-String Maximum Power Point Trackers in DC Distribution Systems
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compared to the nonoptimized PV inverter structures, the PV inverters designed using the proposed optimization methodology exhibit lower total manufacturing and lifetime maintenance cost and inject more energy into the electricgrid and by that minimizing LCOE. (Index Terms—DC–AC power conversion, failure analysis, optimization methods, photovoltaic (PV) power systems, reliability.) Abstract—This paper proposes a high step-up IEEE 2013 solar power optimizer (SPO) that efficiently harvests maximum energy from a photovoltaic (PV) panel then outputs energy to a dcmicrogrid. Its structure integrates coupled inductor and switched capacitor technologies to realize high step-up voltage gain. The leakage inductance energy of the coupled inductor can be recycled to reduce voltage stress and power losses. A low voltage rating and low-conduction resistance switch improves system efficiency by employing the incremental conductance method for the maximum power point tracking (MPPT) algorithm. Because of its high tracking accuracy, the method is widely used in the energy harvesting of PV systems. laboratory prototypes of the proposed SPO that have an input voltage range of 20 to 40 V and a maximum PV output power of 400 V/300 W are applied. The highest PV power conversion efficiency is 96.7%. The maximum MPPT accuracy is 99.9%, and the full load average MPPT accuracy is 97.8%. (Index Terms— High step-up voltage gain, maximu tracking (MPPT), solar power optimizer (SPO).) Abstract—This paper develops the operational IEEE 2013 control of two maximum power point trackers (MPPTs) for two-string photovoltaic (PV) panels in dc distribution systems. This dc distribution system is connected to ac grid via a bidirectional inverter. Two PV strings and two MPPTs are implemented in this system. The proposed MPPT topology consists of buck and boost converters to deal with wide output voltage range of PV panels. To accurately 21/55
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determine the input current of MPPTs, the PVstring configuration check is accomplished online. The perturbation and observation method are applied for maximum power point tracking. Moreover, the current balancing of two MPPT modules in parallel is achieved. In this paper, the system configuration and the operational principle of the proposed MPPT are first introduced. Afterward, the perturbation and observation method and the mode transition are demonstrated. Flowcharts of the online PV-string configuration check and current balancing are explained. The validity of configuration check and current balancing is verified via the experimental results. Maximum power tracking performance and power conversion efficiency are also obtained. (Index Terms—Current balancing, dc distribution system, maximum power point tracking, photovoltaic (PV), solar power.) PE33
Digital Plug-In Repetitive Abstract—This paper investigates a plug-in IEEE 2013 Controller for Single-Phase repetitive control scheme for bridgeless power Bridgeless PFC Converters factor correction (PFC) converters to mitigate input current distortions under continuous conduction mode and discontinuous conduction mode operating conditions. From the PFC converter model and the fact that a type-II compensator is used, a design methodology to maximize the bandwidth of the feedback controller is suggested. After that, the error transfer function including the feedback controller is derived, and the stability of the repetitive control scheme is evaluated using the error transfer function. The implementation of the digital repetitive controller is also discussed. The simulation and experimental results show that the input current THD is significantly improved by using the proposed control scheme for a 1-kW single-phase bridgeless PFC converter prototype. (Index Terms—AC–DC converters, bridgeless power factor correction (PFC) converter, digital average current control, repetitive control.)
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Dual Transformerless Single-Stage Current
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Abstract—Alternative energy sources have for IEEE 2013 some time attracted great interest in the area of 22/55
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Source Inverter With Energy Management Control Strategy
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static converter development. This fact is related in greater part to issues such as sustainability and detrimental effects on the natural environment, which all contribute to the viability of this type of energy source. In this context, power electronics performs important tasks making viable the connection of all these kind of clean power sources to the conventional grid and also to the load. From this perspective, a new challenge must be faced which is the development of energy management systems capable of providing intelligent planning and control of appliances in low- and high-power applications. That being so, this paper intends to contribute presenting a novel dual transformerless single-stage current source inverter fed by a proton exchange membrane fuel cell (PEMFC) and a photovoltaic (PV) array. High voltage gain and totally controlled output voltage can be achieved without using dedicated step-up dc–dc converters or transformers either. The main feature of this inverter structure is the intelligent power management technique which focuses on the extraction of maximum power from the PV array keeping the PEMFC as an energy storage system. Theoretical analysis is presented and corroborated by experimental results of a 400Wlaboratory prototype. (IndexTerms— Buck–boost, current source inverter (CSI), energy management, fuel cell (FC), inverters, photovoltaic (PV), singlestage, transformerless.)
Electric Equivalent Model Abstract—This paper presents an electric IEEE 2013 for Induction Electrodeless equivalent model applied to induction Fluorescent Lamps electrodeless fluorescent lamps. The model is based on passive components and takes into account the real and reactive lamp power. The presented model and its obtention methodology will be an important tool for ballast designers. One of the most important features of the proposed methodology is the concern regarding core losses and lamp reactive characteristics, because nowadays there are no electricmodels including these characteristics. In order to obtain and validate the electrodeless
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lamp model, a series–parallel resonant half bridge inverter is used as ballast. Plasma and lamp windings are modeled as resistances and reactances depending on the lamp power. Simulations employing the proposed model are also presented, showing an excellent agreement with experimental results. (Index Terms— Electrodeless fluorescent lamps, equivalent model, high frequency.) PE36
Enhanced Control of a Abstract—This paper presents an enhanced IEEE 2013 DFIG-Based Wind-Power control method for a doubly fed induction Generation System With generator (DFIG)-based wind-power generation Series Grid-Side system with series grid-side converter (SGSC) Converter Under under unbalanced grid voltage conditions. The Unbalanced Grid Voltage behaviors of the DFIG system with SGSC Conditions during network unbalance are described. By injecting a series control voltage generated from the SGSC to balance the stator voltage, the adverse effects of voltage unbalance upon the DFIG, such as stator and rotor current unbalances, electromagnetic torque, and power pulsations, can be removed, and then the conventional vector control strategy for the rotor-side converter remains in full force under unbalanced conditions. Meanwhile, three control targets for the parallel grid-side converter (PGSC) are identified, including eliminating the oscillations in the total active power or reactive power, or eliminating negative-sequence current injected to the grid. Furthermore, a precise current reference generation strategy for the PGSC has been proposed for the PGSC to further improve the operation performance of the whole system. Finally, the proposed coordinated control strategy for the DFIG system with SGSC has been validated by the simulation results of a 2MW-DFIG-based wind turbine with SGSC and experimental results on a laboratory-scale experimental rig under small steady-state grid voltage unbalance. (Index Terms—Doubly fed induction generator (DFIG), enhanced control, grid voltage unbalance, series grid-side converter (SGSC), wind-power generation.)
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Generalized Multicell Switched-Inductor and Switched-Capacitor ZSource Inverters
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Grid Interfacing of Abstract—This paper investigates the suitability IEEE 2013 Multimegawatt Photovoltaic of selective harmonic elimination (SHE) for Inverters low-loss multimegawatt gridconnected photovoltaic (PV) inverters. The proposed system is able to meet utilities regulations, IEEE and IEC standards. In an attempt to substantiate the potential superiority of SHE over carrier-based or space-vector pulsewidth modulation (PWM), this paper demonstrates that SHE may allow grid-connected PV inverters to be controlled using a switching frequency of less than 1 kHz, while the inverter is still able to provide necessary operation features such as independent control of active and reactive powers and operation control simplicity. For system validation, experimental results with SHE are compared to the case when the inverter is controlled using third-harmonic injection PWM, with a 2-kHz switching frequency. Furthermore, the paper proposes a new implementation technique for SHE that
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Abstract—Traditional voltage-source inverter IEEE 2013 is limited by its only voltage step-down operation, while current-source inverter is limited by its only current step-down mode. In order to add an extra boosting flexibility while keeping the number of active semiconductors unchanged, voltage-type and current-type Zsource inverters were earlier proposed. These new classes of inverters are generally more robust and less sensitive to electromagnetic noises. However, their boosting capabilities are somehow compromised by high component stresses and poorer spectral performances caused by low modulation ratios. Their boosting gains are, therefore, limited in practice. To overcome these shortcomings, the generalized switched-inductor and switched-capacitor Zsource inverters are proposed,whose extra boosting abilities and other advantages have already been verified in simulation and experiment. (Index Terms—Cascaded inverters, multicell inverters, switchedcapacitor (SC), switched-inductor (SL), Z-source inverters.)
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utilizes the third harmonics to spread the switching angles over 90◦ instead of being located in a narrow range as generated when using conventional techniques, along with increases in modulation index. The advantages of the proposed technique include simplicity in implementation and flexibility in PWM waveforms. Simulation and experimentation demonstrate agreement, which validates the practicability of the proposed system. (Index Terms—Grid-connected photovoltaic inverters, highpower medium-voltage inverters, pulsewidth modulations (PWMs), switching losses.) PE39
High Boost Ratio Hybrid Transformer DC–DC Converter for Photovoltaic Module Applications
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Abstract—This paper presents a nonisolated, IEEE 2013 high boost ratio hybrid transformer dc–dc converter with applications for low-voltage renewable energy sources. The proposed converter utilizes a hybrid transformer to transfer the inductive and capacitive energy simultaneously, achieving a high boost ratio with a smaller sized magnetic component. As a result of incorporating the resonant operation mode into the traditional high boost ratio pulsewidth modulation converter, the turn-off loss of the switch is reduced, increasing the efficiency of the converter under all load conditions. The input current ripple and conduction losses are also reduced because of the hybrid linear-sinusoidal input current waveforms. The voltage stresses on the active switch and diodes are maintained at a low level and are independent of the changing input voltage over a wide range as a result of the resonant capacitor transferring energy to the output of the converter. The effectiveness of the proposed converter was experimentally verified using a 220-W prototype circuit. Utilizing an input voltage ranging from 20 to 45V and a load range of 30–220W, the experimental results show system of efficiencies greater than 96% with a peak efficiency of 97.4% at 35-V input, 160-W output. Due to the high system efficiency and the ability to operate with a wide variable input voltage, the proposed converter 26/55
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PE40
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is an attractive design for alternative low dc voltage energy sources, such as solar photovoltaic modules and fuel cells. (Index Terms—California energy commission (CEC) efficiency, energy sources with low dc voltage, European union (EU) efficiency, high boost ratio dc–dc, high efficiency, hybrid transformer, photovoltaic (PV) module.) High Power Factor AC– Abstract—In this paper, a new method is IEEE 2013 DC LED Driver With Film proposed to eliminate electrolytic capacitors in Capacitors a two-stage ac–dc light-emitting diode (LED) driver. DC-biased sinusoidal or square-wave LED drivingcurrent can help to reduce the power imbalance between ac input and dc output. In doing so, film capacitors can be adopted to improve LED driver’s lifetime. The relationship between the peakto- average ratio of the pulsating current in LEDs and the storage capacitance according to given storage capacitance is derived. Using the proposed “zero-low-level square-wave driving current” scheme, the storage capacitance in the LED driver can be reduced to 52.7% comparing with that in the driver using constant dc driving current. The input power factor is almost unity, which complies with lighting equipment standards such as IEC-1000-3-2 for Class C equipments. The voltage across the storage capacitors is analyzed and verified during the whole pulse width modulation dimming range. For the ease of dimming and implementation, a 50WLED driver with zero-low-level squarewave driving current is built and the experimental results are presented to verify the proposed methods. (Index Terms—Converters, dimming, LED driver, lighting, pulsating driving current.) High-Efficiency Abstract—Due to their high reliability and IEEE 2013 Asymmetrical Half-Bridge luminous efficacy, high-brightness light-emitting Converter Without diodes are being widely used in lighting Electrolytic Capacitor for applications, and therefore, their power Low-Output-Voltage AC– supplies are required to have also high reliability DC LED Drivers and efficiency. A very common approach for achieving this in ac–dc applications is using a two-stage topology. The power factor corrector boost converter operating in the boundary
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conduction mode is a very common converter used as first stage. It is normally designed without electrolytic capacitors, improving reliability but also increasing the low-frequency ripple of the output voltage. The asymmetrical half-bridge (AHB) is a perfect option for the second stage as it has very high efficiency, it operates at constant switching frequency, and its output filter is small (i.e., it can be also easily implemented without electrolytic capacitors). Moreover, the AHB is an excellent candidate for selfdriven synchronous rectification (SD-SR) as its transformer does not have dead times. However, the standard configuration of the SD-SR must bemodified in this case in order to deal with the transformer voltage variations due to the input voltage ripple and, more important, due to the LED dimming state. This modification is presented in this paper. Another important issue regarding the AHB is that its closed-loop controller cannot be very fast and it cannot easily cancel the previously mentioned low-frequency ripple. In this paper, a feedforward technique, specifically designed to overcome this problem, is also presented. The experimental results obtained with a 60-W topology show that efficiency of the AHB may be very high (94.5%), while the inherent control problems related to the AHB can be overcome by the proposed feed-forward technique. (Index Terms—AC–DC converter, asymmetrical half bridge, dc– dc converter, LED drivers, lowoutput voltage, self-driven synchronous rectification (SD-SR).) PE42
High-Efficiency SingleAbstract—The aim of this study is to develop a IEEE 2013 Input Multiple-Output DC– high-efficiency single-input multiple-output DC Converter (SIMO) dc–dc converter. The proposed converter can boost the voltage of a lowvoltage input power source to a controllable high-voltage dc bus and middle-voltage output terminals. The high-voltage dc bus can take as the main power for a high-voltage dc load or the front terminal of a dc–ac inverter. Moreover, middle-voltage output terminals can supply powers for individual middle-voltage dc
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loads or for charging auxiliary power sources (e.g., battery modules). In this study, a coupled-inductorbased dc–dc converter scheme utilizes only one power switch with the properties of voltage clamping and soft switching, and the corresponding device specifications are adequately designed. As a result, the objectives of high-efficiency power conversion, high stepup ratio, and various output voltages with different levels can be obtained. Some experimental results via a kilowatt-level prototype are given to verify the effectiveness of the proposed SIMO dc–dc converter in practical applications. (Index Terms—Coupled inductor, high-efficiency power conversion, single-input multiple-output (SIMO) converter, soft switching, voltage clamping.) PE43
Hybrid-Frequency Modulation for PWMIntegrated Resonant Converters
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Abstract—This paper presents a unique IEEE 2013 modulation method for extending the input range of pulse-width modulation (PWM)- integrated resonant converters, such as the isolated boost resonant converter, while maintaining high conversion efficiency. The technique includes primarily the hybridizing of constant-on, constantoff, and fixed-frequency control depending only on the required duty cycle. The modulation scheme reduces core loss and conduction loss dramatically by decreasing the applied volt-seconds at the transformer and improving the switching period utilization. With hybrid-frequency control, the circuit alsomaintains zero current switching for the output diodes, minimizes switching loss, and eliminates circulating energy at the transformer across the entire operating range. It also allows for a predictable voltage gain, dependent only on duty cycle and transformer turns ratio. A detailed loss analysis is provided and verified against a 180 W experimental prototype, with an input range of 12–48 V and a switching frequency range of 30–70 kHz. Implementation issues are also handled with a variety of solutions for realizing the modulation scheme. Experimental results show greater than 4% weighted efficiency improvement in the 29/55
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prototype using the proposed method. (Index Terms—DC–DC modulation, integrated boost resonant (IBR) converter) PE44
Improved Sensorless Operation of a CSI-Based Induction Motor Drive: Long Feeder Case
Abstract—Various applications, like in IEEE 2013 underground mines and oil and gas industries, require remote operation of vectorcontrolled medium-voltage variable speed drives via a long motor feeder. The use of voltage source inverters in such cases leads to motor overvoltage and harmonic quality problems. The current source inverter (CSI) is ideally matched to these applications because of its motorfriendly voltage output. Speed sensorless operation is mandatory due to the longmotor feeder. Although the model reference adaptive system (MRAS) is a powerful and proven speed estimation tool, its implementation in long motor feeder drives faces many challenges. Among them, and addressed in this paper, are inherent dc offset in its stator model, the need for actual motor voltage and current values, and oscillations in the estimated speed due to errors in the motor current measurement signals. In this paper, a sensorless CSI vector-controlled drive, suitable for long motor feeder applications, is studied. Improved speed estimation is achieved by proposing 1) a modified dc- offset eliminator for an MRAS speed estimation and 2) a compensation technique for motor current’s measurement errors. Intensive experimental results, for a low-voltage scaled model, along with simulations validate the effectiveness of the proposed technique. (Index Terms—Current source inverter, long feeder, medium voltage drives, speed sensor-less.)
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Improved Trans-ZSource Inverter With Continuous Input Current and Boost Inversion Capability
Abstract—This paper deals with a new family IEEE 2013 of high boost voltage inverters that improve upon the conventional trans-Z-source and transquasi-Z-source inverters. The improved transZ-source inverter provides continuous input current and a higher boost voltage inversion capability. In addition, the improved inverter can suppress resonant current at startup, which might destroy the device. In comparison to the conventional trans-Z-source/-trans-quasi-
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
Zsource inverters, for the same transformer turn ratio and input and output voltages, the improved inverter has a higher modulation index with reduced voltage stress on the dc link, lower current stress flow on the transformer windings and diode, and lower input current ripple. In order to produce the same input and output voltage with the same modulation index, the improved inverter uses a lower transformer turn ratio compared to the conventional inverters. Thus, the size and weight of the transformer in the improved inverter can be reduced. This paper presents the operating principles, analysis and simulation results, and compares them with those of the conventional trans-Z-source/-quasiZ-source inverters. To verify the performance of the improved converter, a laboratory prototype was constructed based on a TMS320F2812 digital signal processor with 100 Vdc input and 115 Vrms output voltage. (Index Terms—Boost inversion ability, shoot-through state, trans-Z-source inverter, transformer, Zsource inverter.) PE46
Improved Voltage-Vector Abstract—This paper presents a dead-beat IEEE 2013 Sequences on Dead-Beat predictive direct power control (DPC) strategy Predictive Direct Power and its improved voltage-vector sequences for Control of Reversible reversible three-phase grid-connected voltageThree-Phase Gridsource converters (VSCs). The instantaneous Connected Voltage-Source variation rates of active and reactive powers, Converters by applying each converter voltage vector in 12 different sectors, are deduced and analyzed. Based on the power variation rates, it is found that the values of the predicted duration times for the two conventional active converter voltage vectors are less than zero when the gridconnected VSC operates as either a rectifier or an inverter. In order to solve this issue, two new alternative vector sequences are proposed and compared. Experimental results on a 1.5 kW reversible grid-connected VSC system are presented to validate the feasibility of the proposed voltage-vector sequences on the dead-beat predictive DPC strategy. (Index Terms—Dead-beat, direct power control (DPC), duration time, predictive, vector
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PE47
PE48
sequences, voltage-source converter (VSC).) Input Differential-Mode Abstract—In this paper, the differential-mode IEEE 2013 EMI of CRM Boost PFC (DM) electromagnetic interference (EMI) noise Converter of a single-phase boost power factor correction converter operating in critical current mode was analyzed. The DM noise spectra are calculated based on the mathematicalmodel of EMI receiver and the required corner frequencies of DM filter are obtained. It can be seen that the minimum corner frequencies are determined by the maximum noises at 150 kHz. With the relation between the magnitude of the inductor current ripple and theDMnoise, the characteristics of noise at 150 kHz are obtained by analyzing the current ripple magnitude at 150 kHz; thus, the worst conditions which have the maximum noise value are figured out. Meanwhile, the maximum noises at 150 kHz for different input voltages are identical, so the DM filter can be designed based on one worst spectrum at one input voltage without testing the spectra in other conditions. (Index Terms— Boost converter, critical current mode (CRM), differential mode (DM), electromagnetic interference (EMI), power factor correction (PFC).) Integration and Operation Abstract—This study is focused on integration IEEE 2013 of a Single-Phase and operation of a single-phase bidirectional Bidirectional Inverter With inverter with two buck/boost maximum power Two Buck/Boost MPPTs point trackers (MPPTs) for dc-distribution for DC-Distribution applications. In a dc-distribution system, a Applications bidirectional inverter is required to control the power flow between dc bus and ac grid, and to regulate the dc bus to a certain range of voltages.Adroop regulation mechanism according to the inverter inductor current levels to reduce capacitor size, balance power flow, and accommodate load variation is proposed. Since the photovoltaic (PV) array voltage can vary from 0 to 600 V, especially with thin-film PV panels, the MPPT topology is formed with buck and boost converters to operate at the dc-bus voltage around 380 V, reducing the voltage stress of its followed inverter. Additionally, the controller can online check the
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PE49
PE50
input configuration of the two MPPTs, equally distribute the PV-array output current to the twoMPPTs in parallel operation, and switch control laws to smooth out mode transition. A comparison between the conventional boostMPPT and the proposed buck/boostMPPT integrated with a PV inverter is also presented. Experimental results obtained froma 5-kW system have verified the discussion and feasibility. (Index Terms— Bidirectional inverter, buck/boost maximum power point trackers (MPPTs), dc-distribution applications.) Interleaved Boundary Abstract—An interleaved boundary conduction IEEE 2013 Conduction Mode (BCM) mode powerfactor- correction buck converter Buck Power Factor that maintains high efficiency across entire load Correction (PFC) and line range is proposed. The adaptive Converter master– slave interleaving method maintains stable 180◦ out-of-phase operation during any transient. By interleaving two parallelconnected buck converters, the input current ripple is halved while the ripple frequency is doubled, which leads to a smaller differential mode line filter. The line current harmonic distortion is analyzed to examine the allowable output voltage range while meeting harmonic regulations. The operation and performance of the proposed circuit is verified on a 300 W, universal line experimental prototype with 80 V output. The measured efficiencies remain above 96% down to 20% of full load across the entire universal line range. Even at 10% of full-load condition, the efficiency remains above 94%. The input current harmonics also meet the IEC61000- 3-2 (class D) standard. (Index Terms—Boundary conduction mode (BCM), buck converter, interleaving, power factor correction (PFC).) Light-Load Efficiency Improvement in BuckDerived Single-Stage Single-Switch PFC Converters
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Abstract—Single-stage single-switch ac/dc IEEE 2013 converters with power factor correction (PFC) generally have higher power losses under a light-load condition, as compared to that of the two-stage approach, due to the sharing of a common power transistor such that the PFC stage cannot be switched OFF separately to 33/55
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save power losses. This letter addresses this problem by using a buck topology for the PFC stage of the single-stage single-switch converters as it can be completely turned OFF by operating the converter only near the zero crossing of the input voltage, due to the presence of the dead angle of input current. Hence, the switching and conduction losses to the transistor and diodes, and passive devices are reduced. Also, further improvement is made by finding the best combination of dc-bus capacitor charging time and discharging time to achieve the lowest power loss. A recently proposed converter topology which combines a buck PFC cell with a buck–boost dc/dc cell is used as an example. Experimental results are reported and confirmed that the proposed lightload power loss reduction scheme on the converter can improve power stage efficiency by up to 7% at 1 W of output power as compared to that without the proposed scheme. (Index Terms—Light-load efficiency, power consumption, Power factor correction, single-stage.) PE51
PE52
Light-to-Light: PV-Fed LED Lighting Systems
Abstract—This paper discusses the principle of IEEE 2013 operation, dynamic modeling, and control design for light-to-light (LtL) systems, whose aim is to directly convert the sun irradiation into artificial light. The system discussed in this paper is composed by a photovoltaic (PV) panel, an LED array, a dc–dc converter dedicated to the maximum power point tracking of the PV panel and a dc–dc converter dedicated to drive the LEDs array. A system controller is also included, whose goal is to ensure the matching between the maximum available PV power and the LED power by means of a low-frequency LEDs dimming. An experimental design example is discussed to illustrate the functionalities of the LtL system. (Index Terms —LED lighting, maximum power point tracking, PV systems.) Mitigation of Lower Abstract—In this paper, a simple single-phase IEEE 2013 Order Harmonics in a Grid- grid-connected photovoltaic (PV) inverter Connected Single-Phase topology consisting of a boost section, a low-
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PV Inverter
voltage single-phase inverter with an inductive filter, and a step-up transformer interfacing the grid is considered. Ideally, this topology will not inject any lower order harmonics into the grid due to high-frequency pulse width modulation operation. However, the nonideal factors in the system such as core saturation-induced distorted magnetizing current of the transformer and the dead time of the inverter, etc., contribute to a significant amount of lower order harmonics in the grid current. A novel design of inverter current control that mitigates lower order harmonics is presented in this paper. An adaptive harmonic compensation technique and its design are proposed for the lower order harmonic compensation. In addition, a proportional-resonant-integral (PRI) controller and its design are also proposed. This controller eliminates the dc component in the control system, which introduces even harmonics in the grid current in the topology considered.The dynamics of the system due to the interaction between the PRI controller and the adaptive compensation scheme is also analyzed. The complete design has been validated with experimental results and good agreement with theoretical analysis of the overall system is observed. (Index Terms—Adaptive filters, harmonic distortion, inverters, solar energy.)
Modeling and Simulation of All-Electric Ships With Low-Voltage DC Hybrid Power Systems
Abstract—DChybrid power systems are of IEEE 2013 interest for future low emission, fuel-efficient vessels. In spite of the advantages they offer onboard a ship, they result in a complex, interconnected system, which requires effective analysis tools to enable a full realization of the advantages. Modeling and simulation are essential tools to facilitate design, analysis, and optimization of the system. This paper reviews modeling of hybrid electric ship components including mechanical and electrical elements. Power electronic converters are modeled by nonlinear averaging methods to suit system-level studies. A unified model for bidirectional converters is proposed to avoid transitions between two separate models. A simulation
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platform using the derived models is developed for the system-level analysis of hybrid electric ships. Simulation results of power sharing among two diesel generators, a fuel cell module, and an energy storage system are presented for three modes of operation. (Index Terms—DC distribution systems, modeling, simulation, transportation.) PE54
Multilevel DC-Link Inverter and Control Algorithm to Overcome the PV Partial Shading
Abstract—This letter presents for the first time IEEE 2013 the application of multilevel dc-link inverter to overcome the problem of partial shading of individual photovoltaic (PV) sources which are connected in series. The “PV permutation algorithm,” as a new method, is developed for the control of the inverter so as to extract the maximum power form each PV source under partial shading and to deliver all that power to the load. The algorithm is based on combination of the direct pulsewidth modulation, the sequential permutation PV sources, and the output generation to control the multilevel dc-link inverter. The algorithm is applied successfully to a seven-level inverter with separate maximum power point tracking algorithm for each PV source and under nonuniform irradiance (partial shading). Digital processing unit F28335 eZdsp is used to control the PV system in the real-time mode, and MATLAB–Simulink real-time data exchange is employed to display the extracted power and to control the system parameters via a designed graphical user interface window. The implementation and experimental results are presented. (Index Terms—Maximum power point tracking (MPPT), multilevel inverter, photovoltaic partial shading, real-time data exchange (RTDX).)
PE55
Mutual Impedance of Small Ring-Type Coils for Multiwinding Induction Heating Appliances
Abstract—This paper proposes amodel of the IEEE 2013 mutual impedance between ring-type coils used in domestic induction hobs. Recent developments in these appliances have focused on flexible cooking surfaces, including adjustable-size or total-active surfaces. Flexible cooking surfaces are implemented by means of several small ring-type closely arranged coils,
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each one supplied by a resonant inverter. The basic winding is a ring-type circular small coil, whose self-impedance has been reported previously. In this paper, the coupling between coils in terms of impedance is derived. The coils are modeled as axisymmetric current density distributions with parallel revolution axes. The mutual impedance between the coils is obtained considering two media representing the load and the ferrite, respectively. Experimental measurements have been performed to validate the results. (Index Terms—Frequencydependent impedance, home appliances, impedance matrix, impedance measurements, induction heating, inductors, mutual coupling, mutual impedance.) Nonlinear Behavior and Abstract—Three-phase voltage source IEEE 2013 Instability in a Three-Phase converters (VSCs) are commonly used to Boost Rectifier Connected convert ac power from a three-phase grid to a to a Nonideal Power Grid regulated dc voltage with unity input power With an Interacting Load factor. The control of the VSC is normally achieved by an outer voltage feedback loop and a sinusoidal pulsewidth-modulated inner current loop. However, the nonideal power grid and the presence of other interacting loads give rise to nonlinear operation and drive the VSC to enter an irreversible instability region. In this paper, an irreversible bifurcation phenomenon in a three-phase VSC connected to a power grid with an interacting load is reported. The converter can also be regarded as exhibiting a catastrophic bifurcation in which the input current expands to impose undesirable component stress. A large-signal analysis is adopted to identify the physical origin of the phenomenon and to locate the boundary of the instability. Experimental results on a 4-kVA ac/dc converter prototype provide verification of the instability phenomenon. (Index Terms— Bifurcation, instability, power grid, three-phase voltage source converter (VSC).) Novel Energy Conversion System Based on a Multimode Single-Leg Power Converter
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Abstract—This paper presents a novel power IEEE 2013 conversion topology for systems, which include a boost and bidirectional converters to control the power flows between sources, batteries, 37/55
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and ultracapacitors. The proposed system (multimode single-leg power converter) substitutes the boost converter and bidirectional converter with a multifunctional bidirectional converter and has cost effectiveness and fault tolerance, preserving the same energy conversion functionalities of the conventional energy conversion system. To verify the performance of the proposed system, its operations are categorized and explained to four different modes. Then, each mode of the proposed system is simulated and implemented experimentally using a prototype test bed. The results present that the proposed conversion system is feasible and applicable for a wide range of applications including alternative/renewable power systems and electric vehicles (EVs).(Index Terms— Bidirectional converter, energy conversion, hybrid vehicles, renewable energy.) PE58
Origin of Cross-Coupling Abstract—Long strings of photovoltaic (PV) IEEE 2013 Effects in Distributed DC– modules are found to be vulnerable to shading DC Converters in effects, causing significant reduction in the system Photovoltaic Applications power output. To overcome this, distributed maximum power point-tracking (DMPPT) schemes have been proposed, in which individual dc–dc converters are connected to each PV module to enable module-wise maximum power extraction. There are twomain concepts to implementDMMPTsystems: series and parallel configuration, describing the connection of the output terminals of the converters. Both systems are studied intensively, with innovative solutions to encountered operational challenges and novel control methods. However, a comprehensive dynamic model for neither system has been presented so far. This paper fills the gap by presenting small-signal models for both configurations, explaining the observed operational peculiarities. The analytical claims are verified with a practical system comprising two maximum power point-tracking buck–boost converters. (Index Terms—Cascaded converters, dc–dc power conversion,
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photovoltaic (PV) power systems.) PE59
Perturbation On-Time Abstract—The proposed perturbation on-time IEEE 2013 (POT) Technique in Power technique suppresses total harmonic distortion Factor Correction (PFC) (THD) and, thus, improves the power factor in Controller for Low Total the power factor correction (PFC) controller. Harmonic Distortion and Besides, the adaptive control of the minimum off High Power Factor time by the proposed inhibit time control can improve efficiency even at lowac input voltage. Therefore, highly integrated PFC converter fabricated in the TSMC 800-V ultrahigh voltage process can achieve low THD of 6%, high PF of 99%, and high efficiency of 95% at the output power of 90W. (Index Terms— Inhibit time (IT) control, nonnegative-voltage zero current detector (NNV-ZCD), perturbation on time (POT), power factor correction (PFC), ultrahigh voltage (UHV).)
PE60
Precise Accelerated Torque Control for Small Inductance Brushless DC Motor
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Abstract—In this paper, precise accelerated IEEE 2013 torque control for a small inductance brushless dc motor (BLDCM) is achieved by electromagnetic torque control and disturbance torque suppression. First, the electromagnetic torque ripple is reduced in commutation and conduction regions. In the former region, the ripple is suppressed by overlapping commutation control and optimizing the duty ratio of the active controller. In the latter region, the unbalance ripple caused by the unbalanced three phase windings is reduced by the proposed asymmetry compensation function, and the disturbance ripple created by the back electromotive force (EMF) is compensated by feedforward control. Second, the disturbance torque has been observed and compensated through the improved disturbance torque controller whose compensation coefficient is obtained by line-to-line back EMF coefficient estimation. And, both the disturbance observation and speed measurement are all synchronized with the encoder pulse alteration. Experimental results are presented to demonstrate the validity and effectiveness of the proposed accelerated torque control scheme. (Index Terms—Accelerated torque, brushless dc motor (BLDCM), disturbance 39/55
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suppression, electromagnetic torque, small inductance, torque ripple.) PE61
Problems Incurred in a Abstract—This paper presents several of the IEEE 2013 Vector- Controlled Single- problems encountered with vector-controlled Phase Induction Motor, single-phase induction motor (SPIM), and and a Proposal for a discusses about the complex implementation of Vector-Controlled Two- a vector controlled SPIM drive. The vectorPhase Induction Motor as a controlled symmetrical two-phase induction Replacement motor (TPIM) is presented as a viable replacement for the vector-controlled SPIM. The implementation of the proposed vectorcontrolled TPIM is simple compared to the vectorcontrolled SPIM. All the TPIM parameters can be calculated simply and precisely. The proposed strategy for TPIM is derived from the indirect vector control strategy used for three-phase ac machines. Several differences between the vector control strategies for the TPIM and for three-phase ac motor are discussed. The validity of the proposed vector-controlled TPIM was verified by simulations and experiments. (Index Terms —Vector-controlled single-phase induction motor (SPIM), vector-controlled two-phase induction motor (TPIM), unsymmetrical motor.)
PE62
Reconfigurable Solar Converter: A Single-Stage Power Conversion PVBattery System
PE63
Series Asymmetrical Half- Abstract—In this paper, an isolated series IEEE 2013 Bridge Converters With asymmetrical halfbridge converter (SA-HBC) is Voltage Autobalance for proposed to satisfy the high power and high
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Abstract—This paper introduces a new IEEE 2013 converter called reconfigurable solar converter (RSC) for photovoltaic (PV)-battery application, particularly utility-scale PV-battery application. The main concept of the new converter is to use a single-stage threephase grid-tie solar PV converter to perform dc/ac and dc/dc operations. This converter solution is appealing for PV-battery application, because itminimizes the number of conversion stages, thereby improving efficiency and reducing cost, weight, and volume. In this paper, a combination of analysis and experimental tests is used to demonstrate the attractive performance characteristics of the proposed RSC. (Index Terms—Converter, energy storage, photovoltaic (PV), solar.)
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High Input-Voltage Applications
PE64
input-voltage requirements. In the proposed converter, two half-bridge modules with series configuration are adopted in the primary side to reduce the switch voltage stress to half of the input voltage.Moreover, the series half-bridge cells share the same transformer and leakage inductance, which simplifies the circuit structure. Zero-voltage-switching transition is achieved for all the active switches by employing the asymmetrical control scheme to reduce the switching losses. Furthermore, the voltages of the input capacitors are automatically balanced without any additional components or complex control methods. In addition, a family of dc–dc converters with series half-bridge structure is explored to give a universal discussion and extensive applications of the proposed contributions for the high input-voltage systems. Finally, a 500–600-V input 48- V output 1-kW prototype operating with 100 kHz switching frequency is built and tested to demonstrate the effectiveness of the proposed SA-HBC converter. The efficiency of 95% at full load is realized. (Index Terms—High voltage applications and voltage autobalance ability, series asymmetrical half-bridge converter (SAHBC).)
Soft-Switching DC/DC Abstract—Anew soft-switching dc/dc IEEE 2013 Converter With a Full ZVS converter, which can solve the drawbacks of Range and Reduced Output existing phase-shifted full-bridge converters Filter for High-Voltage such as narrow zero-voltage-switching (ZVS) Applications range, large circulating current, large duty-cycle loss, and a large output filter in highvoltage applications, is proposed in this paper. The proposed converter is composed of two symmetric half-bridge inverters that are placed in parallel on the primary side and are driven in a phase-shifting manner to regulate the output voltage. At the rectifier stage, two full-bridge rectifiers sharing two low-current-rating diodes are employed. This structure allows the proposed converter to have the advantages of a full ZVS range, no problems related to dutycycle loss, no circulating current, and a significantly reduced output filter. In this paper,
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the circuit configuration, operation principle, and relevant analysis results of the proposed converters are presented. Experimental results on a prototype converter realized with the specification of 80-in plasma display panel sustain power module (320–385 Vdc input, 205 Vdc /5 A output) validate the theoretical analysis. (Index Terms—No circulating current, no duty-cycle loss, phaseshift, zero-voltage switching (ZVS).) PE65
Space-Vector-Modulated Abstract—The Z-source inverter is a relatively IEEE 2013 Three-Level Inverters With recent converter topology that exhibits both a Single Z-Source Network voltage-buck and voltage-boost capability. The Z-source concept can be applied to all dc-toac, acto- dc, ac-to-ac, and dc-to-dc power conversion whether two-level or multilevel. However, multilevel converters offer many benefits for higher power applications. Previous publications have shown the control of a Zsource neutral point clamped inverter using the carrier-based modulation technique. This paper presents the control of a Z-source neutral point clamped inverter using the space vector modulation technique. This gives a number of benefits, both in terms of implementation and harmonic performance. The adopted approach enables the operation of the Z-source arrangement to be optimized and implemented digitally without introducing any extra commutations. The proposed techniques are demonstrated both in simulation and through experimental results from a prototype converter. (IndexTerms—Buck–boost, neutral point clamped inverter, space vector modulation (SVM), Z-source inverter.)
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Synchronous-Reference- Abstract—Switched boost inverter (SBI) is a IEEE 2013 Frame-Based Control of single-stage power converter derived from Switched Boost Inverter for Inverse Watkins Johnson topology. Unlike the Standalone DC Nanogrid traditional buck-type voltage source inverter Applications (VSI), the SBI can produce an ac output voltage that is either greater or less than the available dc input voltage. Also, the SBI exhibits better electromagnetic interference noise immunity when compared to the VSI, which enables compact design of the power converter. Another
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advantage of SBI is that it can supply both dc and ac loads simultaneously from a single dc input. These features make the SBI suitable for dc nanogrid applications. In this paper, the SBI is proposed as a power electronic interface in dc nanogrid. The structure and advantages of the proposed SBI-based nanogrid are discussed in detail. This paper also presents a dq synchronousreference- frame-based controller for SBI, which regulates both dc and ac bus voltages of the nanogrid to their respective reference values under steady state as well as under dynamic load variation in the nanogrid. The control system of SBI has been experimentally validated using a 0.5-kW laboratory prototype of the SBI supplying both dc and ac loads simultaneously, and the relevant experimental results are given in this paper. The low cross regulation and the dynamic performance of the control system have also been verified experimentally for a 20% step change in either dc or ac load of SBI. These experimental results confirm the suitability of the SBI and its closed-loop control strategy for dc nanogrid applications. (Index Terms—DC nanogrid, switched boost inverter (SBI), synchronous reference frame (SRF) control.) PE67
Synthesizable Integrated Abstract—In this paper, an automatic design IEEE 2013 Circuit and System Design tool for a solar energy harvesting IC and for Solar Chargers system is developed with visual basic software, and the synthesis tool employed in this approach can be used to shorten the design time to market. In addition, a smart meter system is developed to measure the solar energy harvesting system’s information with an online system. Users can thus get the proposed system’s information at any time and from anywhere. Finally, good agreement has been found between the analytic and experimental results. (Index Terms—Digital-to-analog converter (DAC), energy harvesting, pulsewidth modulation (PWM).)
PE68
The TAIPEI Rectifier—A Abstract—A new, three-phase, two-switch, IEEE 2013 New Three-Phase Two- power-factorcorrection (PFC) rectifier that can Switch ZVS PFC DCM achieve less than 5% inputcurrent total harmonic
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Boost Rectifier
distortion (THD) and features zero-voltage switching (ZVS) of all the switches over the entire input-voltage and load ranges is introduced. The proposed rectifier also offers automatic voltage balancing across the two output capacitors connected in series,whichmakes it possible to use downstreamconverters designed with lower voltage-rated component that offer better performance and are less expensive than their high-voltage-rated counterparts. In addition, the proposed rectifier also exhibits low commonmode EMI noise. The performance of the proposed rectifier was evaluated on a 2.8-kW prototype with a 780-V output that was designed to operate in 340–520-VL-L,RMS input-voltage range. (Index Terms—Boost converter, discontinuous conduction mode, power factor correction, three phase, voltage balancing, zerovoltage switching.)
Triple Loop Modulation (TLM) for High Reliability and Efficiency in a Power Factor Correction (PFC) System
Abstract—The proposed triple loop IEEE 2013 modulation (TLM) can ensure reliability of the power factor correction (PFC) system due to the improvement of transient response. In conventional design, low bandwidth of less than 20Hz that rejects ac source of 60/120 Hz coupling deteriorates system reliability in case of output load variation. Contrarily, the proposedTLMcan automatically adjust bandwidth to rapidly increase or decrease inductor current to shorten transient response time. Besides, in the steady state, system stability can be guaranteed by low-frequency compensation pole without being affected by the TLM. The test circuit fabricated in a VIS 500 V UHV laterally diffused metal–oxide– semiconductor transistor process demonstrates that the highly integrated PFC controller with the proposed TLM has high power factor of 99%, high efficiency of 95%, and high power driving capability of about 90 W. The improvement in transient response is twofold faster than in conventional PFC design with output load variation from 90 to 20W and vice versa. (Index Terms—Fast transient response,
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power factor correction (PFC), triple loop modulation (TLM).) Unterminated Small-SignalAbstract—The “black- box” modeling of dc–dc IEEE 2013 Behavioral Model of DC– converters has always been an attractive topic DC Converters widely used in engineering practice. However, in order to obtain unterminated model of dc–dc converter, the one had to be removed from the original environment and connected to the high bandwidth voltage source and current sink for easier decoupling of the source and the load dynamics. This paper addresses an online dc– dc converter characterization procedurewhere converter under test can remainworking in the original environment, at the particular operating point, and be connected to any type of the source and the load while the terminated frequency response characteristics are obtained. The source and the load dynamics can then be decoupled from the measured frequency responses using here proposed linear transformation matrix. The verification and validation of the proposed technique will be both presented in this paper. (Index Terms— Behavioral model, dc power systems, decoupling, electronic power converters, unterminated transfer functions.) Γ-Z-Source Inverters
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Abstract—Voltage-type Γ-Z-source inverters IEEE 2013 are proposed in this letter. They use a unique Γshaped impedance network for boosting their output voltage in addition to their usual voltagebuck behavior. Comparing them with other topologies, the proposed inverters use lesser components and a coupled transformer for producing the high-gain and modulation ratio simultaneously. The obtained gain can be tuned by varying the turns ratio γΓZ of the transformer within the narrow range of 1 < γΓZ ≤ 2. This leads to lesser winding turns at high gain, as compared to other related topologies. Experimental testing has already proven the validity of the proposed inverters. (Index Terms —Embedded-Z-source, quasi-Z-source, Tsource, trans-Z-source, Z-source, Γ-Z-source inverters.)
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S.No Project Titles
Domain
IEEE Year
Comparison of Power Quality Improvement Techniques in AC-DC Cuk Converter
Power Electronics/Matlab
2012 – 2013
2 Discontinuous Energy Pump Source Inverters
Power Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
Simulation and Hardware Implementation of Incremental Power 4 Conductance MPPT With Direct Control Method Electronics/Matlab Using Cuk Converter
2012 – 2013
Multiphase DC–DC Converters Using a Boost5 Half-Bridge Cell for High-Voltage and High-Power Applications
Power Electronics/Matlab
2012 – 2013
A Comparison of Symmetrical and Asymmetrical Power 6 Three-Phase H-Bridge Multilevel Inverter for DTC Electronics/Matlab Induction Motor Drives
2012 – 2013
A Hybrid Cascade Converter Topology With Power 7 Series-Connected Symmetrical and Asymmetrical Electronics/Matlab Diode-Clamped H-Bridge Cells
2012 – 2013
A Review of Various Carrier based PWM 8 Methods for Multilevel Inverter
Power Electronics/Matlab
2012 – 2013
Analysis of Cascaded H Bridge Multilevel Inverters Power 9 with Electronics/Matlab Photovoltaic Arrays
2012 – 2013
1
3
Power Quality Improvement Techniques in ACDC Cuk Converter
Power Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
Generalised pulse width modulation approach for Power 13 DC capacitor voltage balancing in diode-clamped Electronics/Matlab multilevel converters
2012 – 2013
Induction Motor Drive Using Seven Level 14 Multilevel Inverter for Energy Saving in Variable Torque Load Application
2012 – 2013
10
Cascaded Multilevel Inverter for Hybrid Electric Vehicles
Fault Recovery Strategy for Hybrid Cascaded H11 Bridge Multi-Level Inverters Flying Capacitor Multilevel Inverter Based Shunt 12 Active Power Filter with Trifling Susceptibility to Divisional Voltages Deregulation
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Power Electronics/Matlab
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Power Electronics/Matlab
2012 – 2013
GZVNewly-Constructed Simplified Single-Phase Multistring Multilevel Power 16 Inverter Topology for Distributed Energy Electronics/Matlab Resources
2012 – 2013
Nine level Cascaded H-bridge Multilevel DC-Link Power 17 Inverter Electronics/Matlab
2012 – 2013
15 Multilevel inverters for low-power application
Power Electronics/Matlab
2012 – 2013
The Comparative Analysis of MultiCarrier Control Power 19 Techniques For SPWM Controlled Cascaded HElectronics/Matlab Bridge Multilevel Inverter
2012 – 2013
Power Electronics/Matlab
2012 – 2013
Design Considerations of Soft Switched Buck PFC Power 21 Converter Electronics/Matlab with Constant On-Time (COT) Control
2012 – 2013
18
Role of High Power Semiconductor Devices in Hybrid Electric Vehicles
20 Bridgeless High-Power-Factor Buck Converter
22
A Modular Grid-Connected Photovoltaic Generation System Based on DC Bus
Power Electronics/Matlab
2012 – 2013
23
A Novel High Step-Up DC–DC Converter for a Microgrid System
Power Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
High-Performance Adaptive Perturb and Observe Power 25 MPPT Technique for Photovoltaic-Based Electronics/Matlab Microgrids
2012 – 2013
An Islanding Detection Method for a Grid24 Connected System Based on the Goertzel Algorithm
Power Electronics/Matlab
2012 – 2013
Multicascoded Sources for a High-Efficiency FuelPower 27 Cell Hybrid Power Electronics/Matlab System in High-Voltage Application
2012 – 2013
28
A High-Efficiency Grid-Tie Battery Energy Storage Power System Electronics/Matlab
2012 – 2013
29
Design and Implementation of a Photovoltaic High- Power Intensity-Discharge Street Lighting System Electronics/Matlab
2012 – 2013
26
Interleaved Soft-Switching Boost Converter for Photovoltaic Power-Generation System
DEVELOPMENT OF A GRID CONNECTED www.ieeeproject.in/ieee-power-electronics-projects/
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
30 PHOTOVOLTAIC POWER CONDITIONING Power SYSTEM BASED ON FLYING CAPACITORS Electronics/Matlab INVERTER High-Efficiency MOSFET Inverter with H-Type Configuration for 31 Photovoltaic Nonisolated AC-Module Applications A New Approach to Achieve Maximum Power 32 Point Tracking for PV System With a Variable Inductor 33
Power Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
Power Electronics for Photovoltaic Energy System Power of an Oceanographic Buoy Electronics/Matlab
2012 – 2013
Single-Phase Seven-Level Grid-Connected 34 Inverter for Photovoltaic System 35
Power Electronics/Matlab
2012 – 2013
Analysis of two resonant converters with the same Power converter leg Electronics/Matlab
2012 – 2013
Series resonant inverter with selective harmonic 36 operation applied to all-metal domestic induction heating 37
2012 – 2013
Power Electronics/Matlab
2012 – 2013
High Frequency Resonant SEPIC Converter with Power Wide Input and Output Voltage Ranges Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
38 Multiplier SEPIC Converter
39
Discontinuous Operation Modes of Current-fed Quasi-Z-Source Inverter
Power Electronics/Matlab
2012 – 2013
40
High Frequency Transformer Isolated Z-Source Inverters
Power Electronics/Matlab
2012 – 2013
Power Electronics/Matlab
2012 – 2013
Photovoltaic Lighting System Based On ZSource/Quasi-Z-Source Converter Topology
Power Electronics/Matlab
2012 – 2013
43 Switched-Inductor Quasi-Z-Source Inverter
Power Electronics/Matlab
2012 – 2013
44 Trans-Z-Source Inverters
Power Electronics/Matlab
2012 – 2013
Z-SOURCE INVERTER BASED 45 PHOTOVOLTAIC POWER GENERATION
Power
2012
41 LCCT-Z-Source Inverters
42
www.ieeeproject.in/ieee-power-electronics-projects/
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
SYSTEM
Electronics/Matlab
– 2013
Power Electronics/Matlab
2012 – 2013
Analysis, design and experimental results of a floating-output Power 47 interleaved-input boost-derived DC–DC high-gain Electronics/Matlab transformer-less converter
2012 – 2013
Analysis, Design, and Experimentation of an 48 Isolated ZVT Boost Converter With Coupled Inductors
Power Electronics/Matlab
2012 – 2013
Average current controlled switching regulators with cascade boost converters
Power Electronics/Matlab
2012 – 2013
Closed-Loop Analysis and Cascade Control of a 50 Nonminimum Phase Boost Converter
Power Electronics/Matlab
2012 – 2013
A Multicarrier Pulse Width Modulator for the Auxiliary Converter and the Diode Rectifier
Power Electronics/Matlab
2012 – 2013
A Three-Phase Unity Power Factor Single-Stage 52 AC–DC Converter Based on an Interleaved Flyback Topology
Power Electronics/Matlab
2012 – 2013
An Efficient High-Step-Up Interleaved DC–DC 46 Converter With a Common Active Clamp
49
51
53
EMI Filter Design for a MHz, kW ThreePhase/Level PWM Rectifier
Power Electronics/Matlab
2012 – 2013
54
Three–leg power converter topology for a battery Power charger Electronics/Matlab
2012 – 2013
55
A Novel Control Scheme of Synchronous Buck Converter for ZVS in Light-Load Condition
Power Electronics/Matlab
2012 – 2013
56
Comparative study of Proportional Integral and Backstepping Controller for Buck Converter
Power Electronics/Matlab
2012 – 2013
57
Dynamic Characteristics of Current-Fed Superbuck Converter
Power Electronics/Matlab
2012 – 2013
58
Inherent clamp flyback–buck converter with winding cross-coupled inductors
Power Electronics/Matlab
2012 – 2013
New Approach for MPPT Control of Photovoltaic Power 59 System With Mutative-Scale Dual-Carrier Electronics/Matlab
2012 – 2013
Single-Inductor Four-Switch Non-Inverting Buck- Power 60 Boost DC-DC Converter Electronics/Matlab
2012 – 2013
www.ieeeproject.in/ieee-power-electronics-projects/
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
61
Synchronous Buck Converter based PV Energy Power System for Portable Applications Chaotic Search Electronics/Matlab
2012 – 2013
62
Current-Fed Quasi-Z-Source Inverter With Power Voltage Buck–Boost and Regeneration Capability Electronics/Matlab
2012 – 2013
63
Single-Phase Seven-Level Grid-Connected Inverter for Photovoltaic System
Power Electronics/Matlab
2012 – 2013
64
Current-Fed Quasi-Z-Source Inverter With Power VoltageBuck–Boost and Regeneration Capability Electronics/Matlab
2012 – 2013
65
Reducing Common-Mode Noise in Two-Switch Forward Converter
Power Electronics/Matlab
2012 – 2013
66
Optimization of Perturb and Observe Maximum Power Point Tracking Method
Power Electronics/Matlab
2012 – 2013
67
Mix-Voltage Conversion for Single-Inductor Dual- Power Output Buck Converters Electronics/Matlab
2012 – 2013
68
Bridgeless SEPIC Rectifier With Unity Power Factor and Reduced Conduction Losses
Power Electronics/Matlab
2012 – 2013
69
PFC Cuk Converter Based Electronic Ballast for Power an W Compact Fluorescent Lamp Electronics/Matlab
2012 – 2013
70
Modelling and simulation of power factor corrected Power AC–DC converters Electronics/Matlab
2012 – 2013
A Modified SEPIC Converter for High-Power71 Factor Rectifier and Universal Input Voltage Applications
Power Electronics/Matlab
2012 – 2013
72
An Improved Sliding Mode Controller for Boost Converter in Solar Energy System
Power Electronics/Matlab
2012 – 2013
73
A Passive Soft-Switching Snubber for PWM Inverters
Power Electronics/Matlab
2012 – 2013
74
Bridgeless SEPIC Rectifier With Unity Power Factor and Reduced Conduction Losses
Power Electronics/Matlab
2011 – 2012
75
PFC Cuk Converter Based Electronic Ballast for Power an 18 W Compact Fluorescent Lamp Electronics/Matlab
2011 – 2012
76
Transformerless Single-Phase Multilevel-Based Photovoltaic Inverter
2011 – 2012
Power Electronics/Matlab
Mix-Voltage Conversion for Single-Inductor Dual- Power www.ieeeproject.in/ieee-power-electronics-projects/
2011 50/55
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
77 Output Buck Converters
Electronics/Matlab
– 2012
A Simple Digital Autotuning For Analog Controller Power in SMPS Electronics/Matlab
2011 – 2012
Circuit Analysis and Modeling of a Phase-Shifted Pulsewidth modulation Full-Bridge-Inverter-Fed Power 79 Ozone Generator With Constant AppliedElectrode Electronics/Matlab Voltage
2011 – 2012
A Soft Switching Scheme for Multiphase DC/Pulsating-DC Converter for Three-Phase 80 High-Frequency-Link Pulsewidth Modulation(PWM) Inverter
Power Electronics/Matlab
2011 – 2012
An Inrush Mitigation Technique of Load 81 Transformers for the Series Voltage Sag Compensator
Power Electronics/Matlab
2011 – 2012
82
Single-Phase AC–AC Converter Based on Quasi- Power Z-Source Topology Electronics/Matlab
2011 – 2012
83
An Efficient AC–DC Step-Up Converter for Low- Power Voltage Energy Harvesting Electronics/Matlab
2011 – 2012
78
Design and Implementation of a Current-Source 84 Converter for Use in Industry Applications of DSTATCOM
Power Electronics/Matlab
2011 – 2012
Analysis of Boundary Control for Buck Converters Power With Instantaneous Constant-Power Loads Electronics/Matlab
2011 – 2012
A Single-Input Space Vector for Control of AC– Power 86 DC Converters Under Generalized Unbalanced Electronics/Matlab Operating Conditions
2011 – 2012
85
Power Electronics/Matlab
2011 – 2012
88 Switched Inductor Z-Source Inverter
Power Electronics/Matlab
2011 – 2012
Hybrid Integration of a Low-Voltage, High89 Current Power Supply Buck Converter With an LTCC Substrate Inductor
Power Electronics/Matlab
2011 – 2012
Nonisolated High Step-up Boost Converter 90 Integrated With Sepic Converter
Power Electronics/Matlab
2011 – 2012
91 Synthesis of Multiple-Input DC/DC Converters
Power Electronics/Matlab
2011 – 2012
87
Effects of Switching Asymmetry on an Isolated Full-Bridge Boost Converter
Optimal Pulsewidth Modulation of Nine-Switch www.ieeeproject.in/ieee-power-electronics-projects/
Power
2011 51/55
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
92 Converter
Electronics/Matlab
– 2012
93 A New ZVT-ZCT-PWM DC–DC Converter
Power Electronics/Matlab
2011 – 2012
Design Guidelines of New Step-up DC/DC 94 Converter for Fuel Cell Powered Distributed Generation Systems
Power Electronics/Matlab
2011 – 2012
Current Harmonic Compensation and Power 95 Factor Improvement by Hybrid Shunt Active Power Filter
Power Electronics/Matlab
2011 – 2012
Power Electronics/Matlab
2011 – 2012
Stability Analysis of a Non-Inverting Synchronous Power 97 Buck-Boost Power Converter for a Solar Power Electronics/Matlab Management System
2011 – 2012
96
An Improved Sliding Mode Controller for Boost Converter in Solar Energy System
98
Digital Average Current-Mode Control of PWM DC–DC Converters Without Current Sensors
Power Electronics/Matlab
2011– 2012
99
Multilevel Inverter For Grid-Connected PV System Employing Digital PI Controller
Power Electronics/Matlab
2011 – 2012
Analysis and Implementation of a Hybrid HighPower Power-Factor Three-Phase Unidirectional Rectifier Electronics/Matlab
2011 – 2012
100
A Novel Single-Stage High-Power-Factor 101 Electronic Ballast With Boost Topology for Multiple Fluorescent Lamps
Power Electronics/Matlab
2011 – 2012
A Novel Power Management Control Strategy for Power Stand-alone Photovoltaic Power System-Matlab Electronics/Matlab
2011 – 2012
Comparison of Z-Source Inverter and Traditional Power 103 Two-Stage Boost-Buck Inverter in Grid-tied Electronics/Matlab Renewable Energy Generation
2011 – 2012
104
Analysis and Implementation of a Hybrid HighPower Power-Factor Three-Phase Unidirectional Rectifier Electronics/Matlab
2011 – 2012
105
A Hybrid Three Phase Current Source Rectifier For High Power Application
Power Electronics/Matlab
2011 – 2012
106
Quasi-Z-Source Inverter for Photovoltaic Power Power Generation Systems Electronics/Matlab
2011 – 2012
102
A Modified SEPIC Converter for High-Power107 Factor Rectifier and Universal Input Voltage Applications www.ieeeproject.in/ieee-power-electronics-projects/
Power Electronics/Matlab
2011 – 2012
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IEEE 2013 -2012 projects in power electronics, 2013 ieee projects in power electronics, IEEE 2013 power electronics project titles | IEEE projects 2013 - 20…
108 Dead-Time Elimination for Voltage Source Inverters
Power Electronics/Matlab
2011 – 2012
Photovoltaic Parallel Resonant DC-link Soft Power Switching Inverter using Hysteresis Current Control Electronics/Matlab
2011 – 2012
Switched-Capacitor/Switched-Inductor Structures Power 110 for Getting Transformerless Hybrid DC–DC Electronics/Matlab PWM Converters
2011 – 2012
Capacitor Balance Issues of the Diode-Clamped Power 111 Multilevel Inverter Operated in a Quasi Two-State Electronics/Matlab Mode
2011 – 2012
Improved Z-Source Inverter With Reduced Z112 Source Capacitor Voltage Stress and Soft-Start Capability
Power Electronics/Matlab
2011 – 2012
113
Multistring Five-Level Inverter With Novel PWM Power Control Scheme for PV Application Electronics/Matlab
2011 – 2012
114
A Hybrid Wind-Solar Energy System: A New Rectifier Stage Topology
Power Electronics/Matlab
2011 – 2012
Fundamental Frequency Switching Strategies of a Power 115 Seven-Level Hybrid Cascaded H-Bridge Electronics/Matlab Multilevel Inverter
2011 – 2012
A BIDIRECTIONAL UPS INVERTER 116 UTILISING HIGH FREQUENCY CENTERTAPPED TRANSFORMER
2011 – 2012
109
Power Electronics/Matlab
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