CYME 7.0 Whats New Industrial and Transmission.pdf
Short Description
Descripción: Engineering Tool by CYME...
Description
CYME 7.0 Industrial and Transmission
CYME 7.0 Industrial and Transmission Power Engineering Software New Features and Modules
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Table of Contents Chapter 1 General Enhancements .............................................................. 5 1.1 Keywords Units ......................................................................................... 5 1.2 System Parameters .................................................................................... 5 1.3 Induction Motors ........................................................................................ 6 1.3.1 Locked Rotor Current Entry in p.u .......................................................... 6 1.3.2 Computation of the Power Factor .......................................................... 6 1.4 Transformer Loading (ANSI / IEC)................................................................... 6 1.5 Customer Types ........................................................................................ 7 Chapter 2 Load Flow Analysis .................................................................... 8 2.1 Tolerance on Impedances ............................................................................ 8 2.2 Include DC Network .................................................................................... 9 2.3 Line Charging ........................................................................................... 9 Chapter 3 Short Circuit Analysis ............................................................... 10 3.1 Tolerance on Impedances .......................................................................... 10 3.2 All Duty Type Analysis ............................................................................... 11 3.1 ANSI / IEC Report Enhancements................................................................. 12 3.1.1 Available reports ............................................................................ 12 3.1.1.1 ANSI & IEC Summary on all Buses ............................................................... 12 3.1.1.2
Fault Flow at a Bus ........................................................................................ 12
3.1.2 Sample Reports ............................................................................. 13 3.1.2.1 IEC Initial Duty Report ................................................................................... 13 3.1.2.2
IEC Peak Duty ............................................................................................... 14
3.1.2.3
ANSI Short Circuit Duties .............................................................................. 16
3.1.3
One Line Diagram Results ................................................................. 18
Chapter 4 Transient Stability Analysis...................................................... 19 4.1 Frequency by Zone .................................................................................. 19 4.1 Global Settings........................................................................................ 21 4.1 Over Current Relay .................................................................................. 23 4.1.1 General Settings ............................................................................ 23 4.1.2 Controlled Breakers ......................................................................... 24 4.1.3 TCC Settings ................................................................................. 25 Chapter 5 Motor Starting Analysis ............................................................ 26 5.1 Locked Rotor Analysis ............................................................................... 26 5.1.1 Analysis Settings ............................................................................ 26 5.1.2 Flicker Table Tab ............................................................................ 28 5.1.3 Locked Rotor Analysis Sample Output .................................................. 29 5.1.4 Display: Color by Voltage Level ........................................................... 30 5.2
Maximum Start Size Analysis ...................................................................... 31 3
New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
5.2.1 5.2.2
Analysis Settings ............................................................................ 31 Running the Analysis and Viewing the Results......................................... 31
Chapter 6 DC Analysis .............................................................................. 33 6.1 Introduction ............................................................................................ 33 6.2 DC Equipment ........................................................................................ 33 6.2.1 DC Bus ........................................................................................ 33 6.2.2 DC Cable ..................................................................................... 34 6.2.3 DC Impedance ............................................................................... 34 6.2.4 DC Load ...................................................................................... 35 6.2.5 DC Motor ..................................................................................... 35 6.2.6 Protective Devices .......................................................................... 37 6.2.7 Charger ....................................................................................... 38 6.2.8 Uninterruptable Power Supply (UPS) .................................................... 40 6.2.9 DC-DC Converter ........................................................................... 40 6.2.10 DC Battery.................................................................................... 41 6.2.10.1 Nominal Rating from Battery Data Sheet ...................................................... 42 6.2.10.2
Nominal Rating from Cell Data Sheet (IEEE 946 STD) ................................. 43
6.2.10.3
Station Battery Data ....................................................................................... 44
6.3 DC Load Flow Analysis .............................................................................. 46 6.3.1 Analysis Parameters ........................................................................ 47 6.3.2 Solving the Power Flow .................................................................... 48 6.3.3 Power Flow Reports ........................................................................ 49 6.4 DC Short Circuit ...................................................................................... 50 6.4.1 Analysis Parameters ........................................................................ 50 6.4.2 Solving the Sort Circuit ..................................................................... 51 6.4.3 Short Circuit Reports ....................................................................... 53 6.4.3.1 Summary on all bus report ............................................................................. 53 6.4.3.2
Fault a Bus report .......................................................................................... 54
6.5 Interface to AC System .............................................................................. 55 6.5.1 AC Power Flow .............................................................................. 55 6.5.2 Harmonic Analysis .......................................................................... 56 Chapter 7 CYMPROTEC ............................................................................. 59 7.1 New Features and Enhancements ................................................................ 59 7.1.1 Protective Device Analysis ................................................................ 59 7.1.2 TCC Library .................................................................................. 60 7.1.3 Device Settings Dialog Box ................................................................ 60 7.1.4 Live Preview Mode .......................................................................... 62 7.1.5 Device Reports .............................................................................. 62 7.1.6 General Enhancements .................................................................... 63 7.2 New Analysis Modules .............................................................................. 63 7.2.1 Sequence of operations .................................................................... 63 7.2.2 Minimum Fault Analysis .................................................................... 65
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Chapter 1 General Enhancements 1.1
Keywords Units
Once a Keyword is created the associated unit is displayed next to the key word in order to avoid any erroneous errors on the one line diagram display.
1.2
System Parameters
This now includes the KW tolerance for DC Networks.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
1.3
Induction Motors
1.3.1
Locked Rotor Current Entry in p.u
The locked rotor current of the motor in the database settings can now be entered in p.u of the rated current.
1.3.2
Computation of the Power Factor
The induction motor Power Factor can now be estimated give the loading factor of the motor.
1.4
Transformer Loading (ANSI / IEC)
In File → Preferences → Simulation you now specify the Transformer loading criteria on either ANSI or IEC standards.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
ANSI Loading Criteria is based on the Secondary Side MVA.
IEC Loading Criteria is based on the Transformer Primary Side MVA.
1.5
Customer Types
The Customer Type addition now includes the option to include DC load types.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Chapter 2 Load Flow Analysis 2.1
Tolerance on Impedances
CYMFLOW and CYMFAULT now include the capability to apply tolerances on Transformer, Line and Cable lengths for maximum and minimum analysis. These tolerances are either User Defined or as per IEC 60076 or IEEE C57.12 default values.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
2.2
Include DC Network
The Charger and UPS are operating as sources to the DC system drawing power from the AC system. The values of the Input Active and the Reactive power to the Charger or UPS are computed from the efficiency and operating power factor specified for each device To include the results of the DC system you need to access the CYMFLOW analysis Controls menu and activate the option in the AC load flow analysis. You can also access the DC Load Flow parameters with the
2.3
button.
Line Charging
The option to include or not Line charging effects in the power flow analysis is now available. The default option is to include line charging effects.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Chapter 3 Short Circuit Analysis 3.1
Tolerance on Impedances
CYMFAULT now include the capability to apply tolerances on Transformer and Synchronous Generator Impedances, Line and Cable lengths for maximum and minimum analysis.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
3.2
All Duty Type Analysis
Summary short circuit analysis for all ANSI or IEC duty types in a single run.
Display on the one line diagram the summary of results for any duty selected via the Short Circuit monitor for all fault types.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
3.1
ANSI / IEC Report Enhancements
Reports layout for all ANSI or IEC duty types have been modified especially when faulting a desired bus
3.1.1
Available reports
The Short Circuit Reports that the user can display on screen are now dependent on the type of fault applied. The following are examples of the reports available for IEC short circuit analysis. 3.1.1.1 ANSI & IEC Summary on all Buses
3.1.1.2 Fault Flow at a Bus IEC Initial Duty
IEC Breaking, Peak and Steady State Note :
The Fault Flow reports at a bus for the initial current and system wide contributions and voltage profiles are provided in detail. For all other duties fault level and first ring contributions are provided along with the IEC multiplying factors for the initial current..
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
ANSI all Duty Types
3.1.2
Sample Reports
3.1.2.1
IEC Initial Duty Report
IEC Short-Circuit - Faulted Bus Summary
Parameters Study Name
Coopr-Cyme-Variable-Frequency-Drive-Network-7.0.sxst
Date
Mon Feb 04 2013
Time
12h11m55s
Project Name
New
Faulted Bus
V-SB-012-A
Duty Type
Initial
Fault Type
All
Faulted Phases
Default
Fault Summary (Pre-Fault) Voltage
Voltage
Phase
kV
Deg
A
6.6
0
B
6.6
-120
C
6.6
120
Fault Summary (During Fault) Fault Type
Amp
Deg
LLL
16262
-84.89
LL
14083
-174.89
LLG
14951
166.82
LG
11902
-84.02
Thevenin Impedances at Faulted Bus 13
New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
R + jX pu
R/X
Z1
0.0527 + j0.5894
0.089
Z0
0.1472 + j1.2336
0.119
First Ring Contributions Device Number
Type
LLL
LG
LL
LLG
10165.7
4967.5
8803.7
8925.7
V-EHP-1005
Cable
6.6KV_B_TIE
Switch
0.0
0.0
0.0
0.0
V-EHP-1007
Cable
3143.5
5494.3
2722.4
4414.0
V-EHP-1008
Cable
2661.3
1298.2
2304.7
2325.0
V-EHP-1009
Cable
215.1
104.7
186.3
187.9
V-EHP-1010
Cable
82.5
40.2
71.4
72.1
First Ring Transfer Impedance Device Number
Type
Z1
Z0
V-EHP-1005
Cable
0.0520 + j0.5876
0.1473 + j1.2336
V-EHP-1007
Cable
0.0454 + j0.5828
0.0297 + j1.1649
V-EHP-1008
Cable
0.0467 + j0.5836
0.1473 + j1.2336
V-EHP-1009
Cable
0.0522 + j0.5889
0.1473 + j1.2336
V-EHP-1010
Cable
0.0527 + j0.5893
0.1472 + j1.2336
3.1.2.2
IEC Peak Duty
IEC Short-Circuit - Faulted Bus Summary
Parameters Study Name
Coopr-Cyme-Variable-Frequency-Drive-Network-7.0.sxst
Date
Mon Feb 04 2013
Time
12h08m28s
Project Name
New
Faulted Bus
V-SB-012-A
Duty Type
Peak
Fault Type
All
Faulted Phases
Default
Method
B
Fault Summary (Pre-Fault) Phase
Voltage
Voltage 14
New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
kV
Deg
A
6.6
0
B
6.6
-120
C
6.6
120
Fault Summary (During Fault) Fault Type
Amp
LLL
45995
LL
39832
LLG
42287
LG
33663
Thevenin Impedances at Faulted Bus R + jX pu
R/X
Z1
0.0527 + j0.5894
0.089
Z0
0.1472 + j1.2336
0.119
IEC Factors Device Number
Type
K
V-EHP-1005
Cable
2.000
6.6KV_B_TIE
Switch
2.000
V-EHP-1007
Cable
2.000
V-EHP-1008
Cable
2.000
V-EHP-1009
Cable
2.000
V-EHP-1010
Cable
2.000
First Ring Contributions Device Number
Type
LLL
LG
LL
LLG
V-EHP-1005
Cable
28753.8
14048.8
24901.5
24864.7
6.6KV_B_TIE
Switch
0.0
0.0
0.0
0.0
V-EHP-1007
Cable
8892.6
15539.4
7699.0
12264.1
V-EHP-1008
Cable
7526.4
3671.3
6519.5
6542.2
V-EHP-1009
Cable
608.1
297.0
526.1
528.9
V-EHP-1010
Cable
231.9
113.1
200.8
203.6
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
First Ring Transfer Impedance Device Number
Type
Z1
Z0
V-EHP-1005
Cable
0.0520 + j0.5876
0.1473 + j1.2336
V-EHP-1007
Cable
0.0454 + j0.5828
0.0297 + j1.1649
V-EHP-1008
Cable
0.0467 + j0.5836
0.1473 + j1.2336
V-EHP-1009
Cable
0.0522 + j0.5889
0.1473 + j1.2336
V-EHP-1010
Cable
0.0527 + j0.5893
0.1472 + j1.2336
3.1.2.3
ANSI Short Circuit Duties
ANSI Short-Circuit - Faulted Bus Summary
Parameters Study Name
Coopr-Cyme-Variable-Frequency-Drive-Network-7.0.sxst
Date
Tue Feb 05 2013
Time
13h21m22s
Project Name
New
Faulted Bus
V-SB-011-B
Duty Type
Contact Parting
Fault Type
All
Faulted Phases
A
Breaker Speed
2 cycles
Contact Parting
1.5 cycles
Fault Summary (Pre-Fault) Voltag Voltag e e Phase
kV
Deg
A
19052.56
0
B
19052.56
-120
C
19052.56
120
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Fault Summary (During Fault) Fault Type
Voltage
Voltage
Current
Current
Phase
kV
Deg
kA
Deg
A
0
90
16.63
-80.01
B
0
-30
16.63
159.99
C
0
-150
16.63
39.99
A
0
0
10.14
-72.89
B
22.75
-138.55
0
0
C
24.75
133.55
0
0
LLL
LG-A
Thevenin Impedances at Faulted Bus R + jX
R + jX
ohms
pu
X/R
Z1
0.1989 + j1.1281
0.0183 + j0.1036
5.673
Z0
1.2616 + j3.1322
0.1158 + j0.2876
2.483
Z1 (ANSI)
0.1975 + j1.1281
0.0181 + j0.1036
5.711
Z0 (ANSI)
1.2476 + j1.5308
0.1146 + j0.1406
1.227
2X1+X0
2R1+R0
pu
pu
(2X1+X0)/ (2R1+R0)
0.495
0.152
3.247
0.495
0.151
2.305
ANSI Factors LLL Fault Local
Remote
Multiplier
Multiplier
(LM)
(RM)
ANSI C37.010
1
ANSI C37.5
1
ANSI Standard
Fault
LG Fault I Sym RM only
I Sym Weighte d
Local
Remote
Multiplier
Multiplier
kA
kA
kA
(LM)
(RM)
1
16.63
16.63
16.63
1
1.105
16.63
18.38
18.33
1
Local Source Contribution
2.883%
Remote Source Contribution
97.117%
Fault
I Sym RM only
Weighted
kA
kA
kA
1
10.13
10.13
10.13
1.063
10.13
10.78
10.76
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New Features and Analysis Modules
I Sym
CYME 7.0 Industrial and Transmission
3.1.3
One Line Diagram Results
For the IEC Breaking, Peak and Steady State duties IEC Factors are applied on the initial current. Therefore the faulted bus short circuit level will automatically be displayed on screen corresponding to the duty type selected.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Chapter 4 Transient Stability Analysis 4.1
Frequency by Zone
This is an optional part of the study, which is particularly useful when interconnected systems with different frequencies are to be included in the transient stability study. After specifying the zones of the network you can specify the desired frequency of any zone in the “Frequency by Zone” dialog box of the transient stability program. Check “Specify Frequency by Zone” and then select the “User defined” settings to enter the desired frequency. The default frequency is the system nominal frequency entered in the parameters tab of the study.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
4.1
Global Settings
In the absence of data for controller models, or in the interest of saving time, it may be necessary to perform simplified stability simulations. That is why, in the Global Settings tab, you have the option to run your simulation with no Turbines, Exciters or Stabilizers, even if some have already been defined.
Note:
If a Generator has a synchronous machine stability model assigned to it, but no Turbine model is used, then the mechanical power input to the Generator is held fixed at its initial value throughout the simulation. Similarly, if no Exciter model is used, the field voltage of the Generator is held constant.
For Synchronous Generators, you have the option to simplify matters by applying the same synchronous machine model type to all Generators, or to utilize the models you have selected on an Individual basis. You can overwrite the individual generator control model specified at the network level with the following selections.
Note:
Make sure that sufficient data has been entered in the Generator database for each machine to be able to use the selected model type. (See Section Error! Reference source not found. Error! Reference source not found.)
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
The Exclude all Controls option disables all controls on all Generators. Alternatively, you may use the Exclude All option for each type such as Turbines, Stabilizers and Exciters with or without saturation modeling.
Wind Turbines and Photovoltaic can be assigned “Use Individual Settings” or apply a particular wind or solar model on all. In addition the constant power model is also available for the user at this level.
Induction motors can be assigned different models
Running Induction Motors
Starting Induction Motors
Apply Skin Effect on Running and Starting Motors
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Synchronous Motors have the same options as Generators.
4.1
Over Current Relay
The Over Current relay now includes the Transient Stability Functionality.
4.1.1
General Settings
The Over Current Relay network settings dialog box includes two tabs: General and Controlled Breakers. The settings at the General tab include the bus Number, the relay Status and the Text displayed in the relay one line diagram symbol. In addition, it includes the Time Current Settings, Relay Operating Time and Observation Delay. The Observation Delay in seconds is included in the total response of the system to account for the fact that the current may recover to within acceptable limits before the breaker trip signal is initiated.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
4.1.2
Controlled Breakers
The Controlled Breakers tab is used to select the circuit breakers that are to trip due to an over current in the protected branch.
The Breaker Operating Time in seconds represents the delay of the breaker trip mechanism to trip or close the contacts. This delay is entered in the Network Settings of the desired breaker.
The Total Breaker Operating Time in seconds is the sum of all three namely. Observation Delay + Relay Operating Time + Breaker Operating Time
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
4.1.3
TCC Settings
User defined Definite Time or directly from the device Time Current curves for either Definite Time or relays with time dial functionality. User Defined Definite Time Settings
The Relay Current Pick Up, Operating and Observation Delay times can be entered by the user.
Note
The Relay Pick Current is used to calculate the branch current threshold that will activate the trip signal.
Example Relay Pick up is 10 A The CT Ratio is 200:5 The Branch Current trip threshold is
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Chapter 5 Motor Starting Analysis The Dynamic Motor Starting Analysis now includes the A. Locked Rotor Analysis (LRA) to calculate the voltage dip of induction and synchronous starting motors on the network. B. The Maximum Start Size to estimate the maximum motor size that can be started on a given bus given the allowable voltage drop.
5.1
Locked Rotor Analysis
To access the Locked Rotor Analysis, go to Analysis > Motor Start > Locked Rotor. You can also choose Motor Start – Locked Rotor Analysis from the Simulation Toolbar and click on the Run Simulation
5.1.1
button.
Analysis Settings
Locked Rotor Analysis calculates the voltage dip starting motors will cause on a network. This calculation assists in determining the proper motor size for installation. Specify the Status (Off, Running, Locked Rotor) of the motors and the starting mode of each Starting motor. At least one motor in the network should be at Starting status to perform a Locked rotor analysis. To change and/or to view the current settings of a motor, click the Modify hyperlink.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Under the During Motor Start group box, you define if the equivalent source, regulators, generators and capacitors are locked or un-locked. For each class of devise, click to place a check mark in the selection box to lock.
Enable these options to calculate the voltage drop at the moment of motor start before regulators, generators or switched capacitors have time to react. In the Output Options group box, you can choose whether to display outputs automatically: summary report, detailed report. Check-mark Color by Voltage Dip to color-code the One Line diagram by voltage dip levels, based on the limits as defined in the Color by Voltage Dip tab% (see View > Display Options, Layers tab, select Analysis layers as the Category). Hint:
Run a Locked rotor analysis with different starting modes to see the decrease of the voltage dip in the network. The acceleration of the motor over time is not simulated.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
5.1.2
Flicker Table Tab
This Table defines the allowed voltage dip depending on the number of starts per day. These are used to compare with the real values obtained from the simulation. This comparison is included in the summary report. Voltage dip values greater than the maximum allowed setting will be displayed in red.
Starts/day (minimum), Starts/day (maximum): define the range of starts/day of motors. Motors with a starts/day value falling within a specific range will be subjected to that range’s allowed voltage dips.
Section Properties dialog box with Starts /day field. Each motor installed has a “Starts/day” value. This value has been introduced to help the users to find out if the actual voltage dip after a ‘Locked Rotor Analysis’ is under the maximum allowed voltage dip limits.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
5.1.3
Locked Rotor Analysis Sample Output
Locked Rotor Analysis Summary Motor Location:
V-K-001C
Input Summary: Nameplate HP Number of Phases Rated Voltage Applied Voltage Starts/Day Starting Assist Efficiency Power Factor Locked Rotor PF NEMA Code kVA/HP Ratio
6500 HP 3 6.60 kV 6.60 kV 1 Starts/Day Variable Frequency Starter 95.0% 89.0% 15.0% D 4.30
Flicker Curve Table:
No. 1 2 3 4 5 6
Minimum
Maximum
At Substation
At Upstream Section
At Motor Terminal
At Maximum Voltage Dip
Starts/Day 1 6 96 1440 14400 144000
Starts/Day 6 96 1440 14400 144000 1440000
(%)
(%)
(%)
(%)
3.00 2.00 2.00 0.00 0.00 0.00
7.00 5.00 3.50 1.50 0.80 0.50
9.00 7.00 5.00 1.50 0.80 0.50
9.00 7.00 5.00 1.50 0.80 0.50
At Substation
At Upstream Section
At Motor Terminal
At Maximum Voltage Dip
(%) 3.00 0.00
(%) 7.00 7.69 91.62 99.25
(%) 9.00 8.39 91.62 100.00
(%) 9.00 8.64 91.27 99.90
Output Summary: Current
Current
At Motor Terminal
(A)
R1
+jX1
2444.99 501.69 459.71
0.23 6.76 1.14
1.54 3.46 7.51
Nominal Locked Rotor Full Load Steady State Actual Current
Impedance(Ohms)
Voltage Dip:
Maximum Starting Dip Allowed Actual Starting Dip Calculated Actual Starting Voltage Pre-Start Voltage
Maximum motor starts/day that satisfies the Flicker Table: 0 per day Highest Constraint Location: At Upstream Section
Worst voltage Sections & Values: Phase
Section Id
Value (%)
A B C
V-K-001A V-K-001A V-K-001A
91.27 91.27 91.27
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
The detailed report is very similar to the power flow report. You can customize the report output. To do this, select the Report > On calculation menu option to display the Reports dialog box; locate your report in the list and click on the Properties hyperlink. This will display the corresponding Report Properties dialog box, where you can edit the parameters of your report.
5.1.4
Display: Color by Voltage Level
To define the color-coding used by the One Line diagram after a ‘Locked Rotor Analysis’, go to View > Display Options > Layers tab. Select the category Analysis Layer and select the layer Voltage Level Color (%).
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
5.2
Maximum Start Size Analysis
To access the Motor Start – Maximum Size Analysis, go to Analysis > Motor Start > Locked Rotor. You can also choose Motor Start – Maximum Start from the Simulation Toolbar and click on the Run Simulation
5.2.1
button.
Analysis Settings
This type of analysis is used to estimate the maximum motor size that can be started on a given section.
Select Network(s): select the feeder(s) to be considered by the analysis. Parameters: define the value for ‘Maximum voltage dip’ allowed and ‘Motor kva/hp Ratio’. Options: place a check mark next to the output you want to be displayed automatically once the analysis is completed – Display the report automatically and / or Display the result box.
5.2.2
Running the Analysis and Viewing the Results
Click Run to start the analysis. Depending on the options selected, either or both the ‘Maximum Motor Size Result Box’ and the ‘Maximum Start Size Analysis detail report’(s) will be displayed automatically.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
The Motor Size Result Box displays the same information as the detail report but displays the information one section at a time. Hint: If you did not check the Display the result box option, generate it by running the analysis again. Un-check the detail report so you will not get double reports. Hint:
Select a section from the detailed report and both the result box and the One Line will highlight the same section and vice versa.
Maximum Motor Size Result Box at Bus 266 The Maximum Start Size Analysis Detailed Report displays a detailed report on all theb sections of the feeder.
Maximum Motor Start Sample Report
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
Chapter 6 DC Analysis 6.1
Introduction
DC Analysis is limited to networks that contain safe power supplies to critical equipment such as DC Motors, Valves and other loads that are required when the DC battery is supplying power to these loads due to a loss in the supply voltage to the Charger. The equipment library has now been enhanced with the addition of DC equipment such as Station Batteries, Charger, Uninterruptable Power Supply (UPS) and DC / DC Converter. In addition DC Cables, Impedance branch, protective devices, loads and machines are now included in the library which allows the user to build any DC network with all the necessary network components.
6.2
DC Equipment
DC Bus
6.2.1
Sources
Loads
Branches
Protective Devices
DC Bus
Depending on the network topology the DC Bus base voltage will be automatically propagated by the software. As an example the Charger Rated output DC Voltage will be selected as the base voltage. Only DC equipment can be connected to a DC bus and all other AC network components will be blocked from connection to a DC bus.
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New Features and Analysis Modules
CYME 7.0 Industrial and Transmission
6.2.2
DC Cable
In DC circuits it is assumed that the two identical cables are connected between the positive and negative terminals of the devices.
This includes the General Data including the construction details of the cable, loading limits and symbol dialog boxes.
In the absence of the electrical parameters data the program can compute the electrical parameters of the Cable from the geometrical construction of the cable.
6.2.3
DC Impedance
The DC Impedance from an electrical stand point is treated exactly as a cable with the only difference being that the impedance value R + jX is entered as a total resistance and inductance of the cable.
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6.2.4
DC Load
DC loads are commonly rated based on their operating voltage and power.
The Rated voltage (V) of the load is specified along with either its Power (KW) or Current (A) and the other is computed since the power equation always should hold true.
6.2.5
DC Motor
The DC motor is very similar to an induction motor and is represented by the following equivalent circuit. Rs
Motor Resistance
L
Winding Inductance
Vg
Back e.m.f
RL
Magnetic Losses
Note
The value of RL is typically large and can be ignored, as can the inductance L which is generally small.
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Mechanical Power
This value may be entered in HP or KW. This power represents the mechanical power developed at shaft of the motor.
Rated Power
In KW is the electrical input power of the motor governed by the following relationship.
Rated Voltage
Motor nameplate voltage in Volts (V)
Efficiency
In % to quantify the electrical power losses in the motor.
Speed
The rated rpm of the motor at normal operating conditions
Load Factor Short Circuit contribution
The following is the short circuit contribution of the motor at its terminal:
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6.2.6
Protective Devices
The protective devices follow a common format as far as the data entry and settings in both the equipment and network properties of each device. Fuse
Switch
LVCB
Nominal Rating
. Rated current
In Amps. Different limits may be defined for equipment in the Loading Limits tab.
Rated Voltage
In kV.
Interrupting Rating
In Amps.
In the short-circuit results, the Withstand Rating is used by the program to check if the short circuit current exceeds the withstand rating of the device.
However, you must enter non-zero value for withstand rating. If this value is zero no check will be made.
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6.2.7
Charger
A charger is a constant voltage source, maintaining its terminal bus voltage at the desired control value as specified in the network settings. Whenever the terminal bus voltage drops below the desired regulated voltage of a charger, it will try to raise the voltage to the regulated value until the charger current reaches Imax. On the other hand if the terminal bus voltage is higher than the charger regulated voltage, the charger becomes inactive and is switched off from the system. However, when the current drawn from the charger is greater than Imax, the maximum current it can provide while keeping its terminal voltage constant at the same time, it becomes a constant current source. The current drawn from the charger is then kept at Imax, while the terminal voltage drifts, depending on the system loading and sources such as batteries or a UPS
Nominal Rating Nominal Voltages
In KW or Amps. Input AC Voltage in Kilo Volts (KV) Output DC Voltage in Volts (V)
Efficiency
In % to quantify the electrical power losses in the Charger.
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Power Factor
The operating power factor of the charger is used to calculate the AC reactive power component.
Maximum Output Current
Imax entered in % of Rated Current or in Amps. Once this threshold is reached the charger output current will be limited to Imax and the terminal voltage will drift, depending on system loading and the presence of other sources.
Control Type
Four Modes of Voltage Control are available
Short Circuit contribution
Fixed Voltage is the desired control voltage at the terminals of the charger
Fixed Power Factor in this option the program will compute the desired voltage at the charger terminal as per the following equation:
Float Voltage is the desired control voltage at the terminal of the charger to maintain a fully charged battery.
Equalization Voltage is the desired voltage at the terminals of the charger to boost the battery charging voltage for a selected period of time.
Specify the Short Circuit Contribution factor (K) of the charger in either % of rated current or Amps.
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6.2.8
Uninterruptable Power Supply (UPS)
A DC UPS is similar to a Charger since it is series component with AC and DC sides. A DC UPS which is a system by itself composed of a charger and a battery which are controlled to feed a dc network during a shutdown. The data and dialog boxes are pretty similar. The only difference is that there’s only one type of DC UPS. The DC battery within the UPS is not modeled at the present time.
6.2.9
DC-DC Converter
A DC-DC Converter is a series component that is comparable to a transformer in DC. It has a DC primary and a DC secondary. The primary is modeled with a load and has no influence on the DC Load Flow calculation on the secondary side.
Nominal Data
Nominal Rating Nominal Voltages
In KW or Amps. Primary Input DC Voltage in Volts (V) Secondary Output DC Voltage in Volts (V)
Efficiency In % to quantify the electrical power losses in the Converter.
Maximum Output Current
Imax entered in % of Rated Current or in Amps. Once this threshold is reached the Converter current will be limited to Imax and the terminal voltage will drift, depending on system loading and the presence of other sources. 40
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Control Type
Operating output DC Voltage in % of rated secondary voltage or Volts
Short Circuit contribution
Specify the Short Circuit Contribution factor (K) of the Converter Secondary in either % of rated current or Amps.
6.2.10 DC Battery
Each Battery consists of a number of Cells with a typical value of 2.08 Volts connected in series for the desired Battery Voltage as an example 12 or 24 V.
Typical Battery specifications are shown below displayed below.
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These in turn are connected in Series and Parallel combinations to generate the required DC Station Voltage and AH Capacity. The voltage could be in the range of 120, 240 or 480 Volts.
The Battery equipment properties offer two choices of entering the nominal information “Battery Type”: Nominal Rating from Battery Data Sheet 6.2.10.1
Nominal Rating from Cell Data Sheet (IEEE 946 STD)
Nominal Rating from Battery Data Sheet
Nominal Data
Nominal Voltage Number of Cells Nominal Capacity Internal Resistance per Cell
For a Single Battery in Volts (VB) Number of Cells within a Battery (NC) In Ampere Hours (Ah) The Internal Cell Resistance. (RC) Total Battery Resistance RB in this case would be
Maximum Discharge Current
Similar to Imax entered in Amps. Once this threshold is reached the Battery output current will be limited to Imax and the terminal voltage will drift, depending on system loading and the presence of other sources. This can either be entered by the user or click on the
Short Current
Circuit
to compute the battery short circuit current at its terminals as:
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6.2.10.2
Nominal Rating from Cell Data Sheet (IEEE 946 STD)
Nominal Data
Nominal Capacity Voltage Per Cell Number of Plates
Resistance Per Positive Plate
In Ampere Hours (Ah). This should be equal to the Capacity of the battery. Nominal Cell Voltage (VOC) in Volts Number of Total Plates positive and negative (NT). This should be an odd number The Number of Positive Plates (NP) is therefore computed as follows:
The resistance per positive plate in Ohms (RP) Note
Maximum Discharge Current
Short Current
Circuit
The positive plates are connected in parallel. Therefore the Internal Cell Resistance (RC) is now computed as follows:
Similar to Imax entered in Amps. Once this threshold is reached the cell output current will be limited to Imax and the terminal voltage will drift, depending on system loading and the presence of other sources. This can either be entered by the user or click on the to compute the cell short circuit current at its terminals as:
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6.2.10.3
Station Battery Data
Battery Type
The type of battery data entry in the equipment dialog box is displayed for reference.
Series Connected Batteries
This represents the Number of Batteries connected in series to obtain the desired station battery voltage output. (NB)
Parallel Strings
This represents the number of parallel strings of batteries to provide the desired Station Battery Capacity in Ampere Hours. (NS).
System Nominal Voltage
This the Station Battery Operating Voltage (VSB)
System Nominal Capacity
This is the Station Battery Capacity (AhSB) computed as follows:
External Connections
The resistance of all external cables connecting the individual batteries per string (RX) 44
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Short Circuit Contribution
Voltage Source Behind an Impedance
The SC Contribution of the battery can be defined in two methods:
Voltage Source Behind and Impedance
Constant Current Source
This the simple case of representing the station battery VSB in series with the total internal resistance of the battery
The Total Impedance would be
Where
The short station battery short circuit current at its terminals:
Constant Current Source
The option represents the battery as a constant current source contribution irrespective of the fault location. The Short Circuit current can be entered as a % of the Station Battery Short circuit current or in Amps.
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6.3
DC Load Flow Analysis
The default calculation method in the DC Analysis module is the Newton Raphson Load Flow solution method. Select DC Load Flow Analysis from the list of available analyses. (See illustration.) You can also select it from Analysis > DC Load Flow Analysis.
Before accessing the Analysis dialog box go to File → System Parameters to modify, if desired, the Base Power for solving the DC Networks.
Click on the Run Simulation icon
in the Simulation toolbar.
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6.3.1
Analysis Parameters
The DC Load Flow Analysis dialog box comprises configuration settings and four tabs that will allow you to set the:
DC Load Flow analysis Parameters such as tolerance, number of iterations, Load or Motor Scaling Factors, Include batteries and motors in the analysis or not.
Remove All Constraints
Adjust Impedance
If this option is checked then the load flow will be solved by relaxing all the constraints on Batteries, Chargers, UPS and Converters. This includes the limit on Imax and the detection of reverse power flow in devices. Note: This is useful for networks that have difficulty converging since the results of the load flow, with relaxed constraints, can provide useful tips as to where the problem may be.
If this option is checked you can click on the button to apply some impedance adjustment factors as a function of Temperature and Tolerance on the Cable length.
The next three dialog boxes are similar to the AC Load Flow Analysis module:
The Networks that the Load Flow is to be performed on.
The Loading / Voltage Limits of equipment and bus voltage violations.
The Output options for reports and one line Diagram. Notes:
You may select to analyze a network without analyzing all the other networks connected to this particular network.
The DC Load Flow can simultaneously solve multiple networks and networks with multiple swing sources.
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6.3.2
Solving the Power Flow
Once the parameters for the DC load flow analysis have been set, you may click on the Save button if you wish to permanently save the parameters to your disk. This is only useful if you wish to re-use the same parameters as default parameters for future studies. Click on the Run button to start the analysis and display the results on the one line diagram, the results box and in the reports. The default layer for the DC Power Flow Results is provided with the program and can be accessed through the results layer tool bar.
After the analysis is completed you can display and color code the one line diagram with any abnormal condition such as overloaded equipment and bus violations by clicking on the of the analysis tool bar.
icon .
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6.3.3
Power Flow Reports
To select and display the DC Load Flow Results reports click on the toolbar or select Report > On Calculation from the menu.
icon of the Simulation
. Lists of reports provided with the software are detailed below:
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6.4
DC Short Circuit
Select DC Short-Circuit from the list of available analyses. You may also select Analysis > Fault Analysis > DC Short-Circuit from the menu.
Click on the Run Simulation icon box.
6.4.1
in the Simulation toolbar to open the Short-circuit dialog
Analysis Parameters
The DC Short Circuit Analysis dialog box comprises configuration settings and four tabs that will allow you to set the:
Calculation including type of analysis and location of fault.
There are two possible calculation modes: Short-Circuit Levels at all Buses and Nodes
Compute the total short-circuit current at all buses and nodes.
Fault Flow Currents and Voltages
Compute the effect of a fault applied at one single location. The current and voltages on all sections/nodes of the respective network will be determined to illustrate the impact of the fault throughout the network. 50
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When the calculation mode “Fault Flow currents and voltages” is selected, the fault location group box is activated to allow users to specify the location at which a fault is to be applied. Location
Allows the user to specify the location at which a fault is to be applied. The fault can be applied to bus or node. Depending on the selection, a list of all the available nodes and buses in the network will be listed for selection.
The next three dialog boxes are similar to the AC Short Circuit Analysis module:
Parameters to specify the pre-fault voltage, security factors and DC equipment contributions.
The Networks that the Short Circuit is to be performed on.
The Output options for reports and one line Diagram.
6.4.2
Solving the Sort Circuit
Once the parameters for the DC short circuit analysis have been set, you may click on the Save button if you wish to permanently save the parameters to your disk. This is only useful if you wish to re-use the same parameters as default parameters for future studies. Click on the Run button to start the analysis and display the results on the one line diagram, the results box and in the reports. The default layers for the DC Short Circuit results provided with the program can be accessed through the results layer tool bar.
DC Short Circuit Results layer to display the short circuit level when a Summary on all Buses and Nodes is performed.
DC Fault Flow Results layer when you fault a single bus or node.
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Fault Level Summary on all bus and nodes
To fault a bus you can either specify the location in the fault analysis calculation dialog box or right click the mouse button followed by apply fault. The short circuit contributions of Batteries, Chargers, UPS, DC-DC converter and Motors are all displayed on the one line diagram along with the voltage of the healthy buses or nodes.
Fault at a bus
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6.4.3
Short Circuit Reports
To select and display the DC Short Circuit Reports click on the or select Report > On Calculation from the menu.
icon of the Simulation toolbar
. 6.4.3.1
Summary on all bus report
List of reports provided with the software for this are detailed below:
Here are is a sample of the summary report.
Detailed Bus Report
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6.4.3.2
Fault a Bus report
List of reports provided with the software for this are detailed below:
Here is a sample report in exported to MS Excel.
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6.5
Interface to AC System
6.5.1 AC Power Flow The Charger and UPS are operating as sources to the DC system drawing power from the AC system. The values of the Input Active and the Reactive power to the Charger or UPS are computed from the efficiency and operating power factor specified for each device .
To include the results of the DC system you need to access the CYMFLOW analysis Controls menu and activate the option
in the AC load flow analysis. You can also
access the DC Load Flow parameters with the
button.
By including the DC analysis keywords in ac power flow layer then the results of both analyses can be displayed on screen. 55
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Below is such an example:
Figure 6-1 : AC and DC Load Flow Results
6.5.2 Harmonic Analysis Power Electronic Devices such as Variable Frequency Drives (VFD”s), Chargers and UPS and FACTS devices now include a Harmonic Current Source Model.
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The Harmonic current source data can be entered in the database settings of the general Frequency Source included in the equipment library of harmonic devices.
The desired frequency source can then be associated to the particular device from the Harmonic Settings of that particular device in the Section Properties dialog box. An example illustrating the settings of the harmonic model for a Charger is shown below.
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To display the harmonic voltage and current distortion results simply activate the CYMHARMO analysis module, set the parameters, specify the location of the points of common coupling (PCC) between the AC and DC and display the results on the OLD, print reports and generate the charts.
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Chapter 7 CYMPROTEC CYME 7.0 brings numerous enhancements and new features to its Network Protection Analysis module. The CYMPROTEC Module is an advanced protection analysis module that is now fully integrated within the CYME 7.0 software package. New Features
Re-designed Protection Analysis Study Menu Device Library Editor Revamped TCC Settings dialog boxes Live Preview mode General Enhancements
New Analysis Modules Sequence of Operation Minimum Fault Analysis
7.1
New Features and Enhancements
7.1.1 Protective Device Analysis The protective Device Analysis now includes the option to access the short circuit analysis parameters dialog box and
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7.1.2 TCC Library To activate the TCC library functions go to Database > TCC Library menu, there are different options regarding the TCC Database.
Library Editor To modify the TCC Library by accessing the Library Editor, click on View to arrange the list displayed on the left hand side to show Protective Devices, Manufacturers, Re-closer Control Types, Cable Insulations, Cable Sizes, Relay Tap Ranges, Device Tolerance and Transformer Inrush. The display of each of the above categories would give access to different data that is pertinent to the category chosen, and these data can be modified. Import and Export Device Settings Device settings as entered in the Library Editor can be imported, or exported to another TCC Library. Re-Index, Compact and Repair Online Update
7.1.3 Device Settings Dialog Box The device settings now consist of Device Specific and General device Settings.
Relay Settings
General
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Common Pages that include information such as Clipping Coordination Curves, Drawing Options Short Circuit Arrows
Short Circuit and Full Load Current
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7.1.4 Live Preview Mode This is a new option allows the modification of any device setting and visualize the change on the TCC curve interactively on-screen.
7.1.5 Device Reports Over Current Relay example report Feeder Id Section ID Device Number Relay Type Manufacturer Model Operating Voltage Short-Circuit Minimum Short-Circuit Maximum
UTILITY-SUPPLY C-L1 C-L1 Electronic CUTLER HAMMER C-H FP5000 ANSI VERY 13.80 KV 921.00 A 14879.94 A Setting
Value Phase 70:1 Tap with Tap Range 0.05 0.05 / 2.4 0.65 45.50 A Off Off
Protection Type CT Ratio Operation Mode Time Dial Tap Range Tap Primary Pickup Short Time Instantaneous
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7.1.6 General Enhancements The Network Protection module in CYME 7.0 can help verify network protection schemes
7.2
User Defined SC Currents TCC View double click on the device click gives direct access to TCC Settings dialog TCC views are now saved with the study New TCC Keywords Customization (Global vs Local) Title Block Information (in Grid Options) Display Tool (TCC Toolbar) IntelliRupter® Type re-closer for up to 25 Curves
New Analysis Modules
7.2.1 Sequence of operations The Sequence of Operation analysis evaluates the impact of a fault on the network to provide the sequence of protective device operations triggered.
User-defined location.
fault
Simulation of any fault type. Calculation of the fault current and opening time of each protective device. Device settings, including
delays and re-closer times of breakers are included in the analysis.
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Tracing of the protective devices triggered in the one-line diagram
Tabular report listing the sequence of device triggered, the opening time and fault current detected at each operation
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7.2.2 Minimum Fault Analysis
The Minimum Fault analysis is offered to assist engineers in the verification of whether the protective devices can adequately detect and clear the minimum faults seen in their respective protection zone. A detailed report is provided to list all areas that are inadequately protected. Those areas are also color-coded on the one-line diagram for easier visualization.
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