Huawei Solar Hybrid Technical_Proposal(Pure Solar)

Huawei Solar Hybrid Technical Proposal(Pure Solar)

2013-6-25

Huawei Technologies Co., Ltd.

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Contents

Contents About This Document ...................................................................Error! Bookmark not defined. 1 Power2000 Overview .................................................................................................................... 1 1.1 Positioning ....................................................................................................................................................... 1 1.2 Benefits ............................................................................................................................................................ 1

2 Application Scenarios .................................................................................................................. 3 3 Power2000 Functions .................................................................................................................... 6 3.1 Power Supply ................................................................................................................................................... 6 3.2 Power Distribution ........................................................................................................................................... 6 3.3 Protection ......................................................................................................................................................... 7 3.4 Alarm Generation ............................................................................................................................................. 7 3.5 PV Module Support .......................................................................................................................................... 8 3.6 Remote Element Management ......................................................................................................................... 8 3.7 PV Module Theft Detection ............................................................................................................................. 9

4 Configurations ............................................................................................................................. 10 5 Component Description............................................................................................................. 11 5.1 PV Modules .................................................................................................................................................... 11 5.2 PV Module Supports ...................................................................................................................................... 12 5.3 Solar Controller .............................................................................................................................................. 12 5.3.1 SC4850E ............................................................................................................................................... 12 5.5 OMU-B .......................................................................................................................................................... 14 5.6 Storage Batteries ............................................................................................................................................ 15 5.6.1 SCBs ..................................................................................................................................................... 15

6 Monitoring System ..................................................................................................................... 18 A Acronyms and Abbreviations .................................................................................................. 19

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1 Power2000 Overview

1

Power2000 Overview

1.1 Positioning The Power2000, consisting of a power supply system and a site monitoring system, is applicable to indoor and outdoor sites where the load power is not great or there is no mains supply.

1.2 Benefits Environmentally Friendly The eco-designed Power2000 effectively uses renewable energy such as solar and wind energy to reduce greenhouse gas emissions.

Low OPEX Renewable resources are used, saving energy while reducing emissions without extra energy costs.

Easy Maintenance Photovoltaic (PV) modules, as the key component in the Power2000, are designed to be maintenance-free while offering high reliability, low fault rate, and easy maintenance.

Remote Monitoring The Power2000 monitors site status and environments remotely and transmits monitoring data over dry contacts.

Modular Design The Power2000 adopts a modular design, which facilitates installation, capacity expansion, and maintenance.

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1 Power2000 Overview

Various Application Scenarios The Power2000 is not only applicable to mainstream base stations, but also applicable in remote areas such as islands, deserts, and undeveloped villages.

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2 Application Scenarios

2

Application Scenarios

The Power2000 uses the Solar Power System to supply power.

Features The Solar Power System converts the power from PV modules into –48 V DC power by using a solar controller and storage batteries to supply power for base stations and other –48V DC equipment. It cannot be connected to the power grid. Table 2-1 Features and applicable conditions of the Solar Power System

Energy

Power Supply System

Applicable Condition

Feature

Solar energy

Solar Power System



Average amount of daily sunshine in a year is longer than 3 hours.



The system uses solar energy to power loads, solving the problem when no mains is supplied and diesel generator (D.G.) maintenance costs are high. In addition, it facilitates energy saving and emission reduction.



The load power is medium or small and no mains is provided.



Carrier-class reliability, mature technologies, and hardened components ensure low maintenance rate.



Maintenance-free PV modules bring low operating expense (OPEX).



Voltages and alarms are reported over dry contacts or serial ports, reducing the times of preventive maintenance inspection (PMI).



Components can be flexibly configured or increased based on load power.



The site is unattended.



The solar power cabinet is installed outdoors.



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The recommended direct current (DC) load power is 1000 W or lower.

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2 Application Scenarios

Network Diagram PV modules convert solar energy into electricity, which converges at junction boxes or the solar controller. The solar controller monitors the power supply, powers loads, and stores unused electricity in storage batteries which start to power loads at night or on cloudy days when there is not enough sunlight. Figure 2-1 shows the network diagram for the Solar Power System with junction boxes. Figure 2-1 Solar Power System with junction boxes

Figure 2-2 shows the network diagram for the Solar Power System without junction boxes. Figure 2-2 Solar Power System with one solar controller

Figure 2-3 Solar Power System with two solar controllers

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2 Application Scenarios

Table 2-2 Mapping between Solar Power Systems and Load Power

Solar Power System

Load Power

Remarks

With one solar controller

700 W (5.5 hours per day)

A single load route: 550 W

NOTE

The previous table assumes that peak sunlight per day is 5.5 hours.

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3 Power2000 Functions

3

Power2000 Functions

3.1 Power Supply Introduction Power is supplied by the Solar Power System.

Features 

–48 V DC power is supplied.



Outdoor scenarios are supported.



In the Solar Power System that uses the Solar Controller 4850E (SC4850E), the ports for PV modules support a maximum of 50 A. For example, if each PV module is 190 Wp, 18 PV modules are supported.



The SC4850E manages power supply in pulse width modulation (PWM) mode and supports the convergence of nine PV inputs.

3.2 Power Distribution Introduction Control systems distribute power for power inputs, storage batteries, and loads. Extra power distribution equipment is not required, which reduces costs and facilitates site setup.

Features All controllers perform power distribution. See Table 3-3 for details.

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3 Power2000 Functions

Table 3-3 Power distribution specifications

Model

PV Input Route

Load Route

Battery Route

SC4850E

Nine bare crimp terminals, total rating input current is 50A,overcurrent threshold is 55A

one 25 A circuit breaker, two 10 A circuit breakers, and one 6 A circuit breaker

One 100 A circuit breaker

3.3 Protection Introduction Protection mechanisms ensure that the Power2000 still works properly in the case of misoperation or under abnormal operating conditions. Normal operation is resumed after the underlying issues are solved, helping to eliminate down time and maximize return on investment (ROI).

Features 

Reverse polarity protection for storage batteries



Battery overvoltage protection



Battery overtemperature protection



LLVD protection

3.4 Alarm Generation Introduction When an alarm is generated, maintenance personnel rectify faults immediately. Alarm records help to identify faults, improving maintenance efficiency.

Features 

Output overvoltage



Output undervoltage



LLVD



BLVD



Battery high temperature



Power2000 faulty



Load fuse blown



Battery fuse blown



Surge protection device (SPD) faulty



PV array faulty

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PV array lost



Controlling panel fault alarm



Input power board short-circuited



Input power board open-circuited



Load overcurrent



Dry contact input faulty

3 Power2000 Functions

In in-band mode, alarms are transmitted to an element management system (EMS) over RS485 ports if the protocol supported by the solar controller is in compliance. Certain alarms can also be transmitted over dry contacts. In out-of-band mode, alarms are transmitted to an EMS over a box type operation manage unit (OMU-B).

3.5 PV Module Support Introduction PV module supports are classified into standard supports, scalable low supports, and scalable high supports. Electricity generation can be maximized by adjusting the angle, direction, and height of PV module supports.

Features PV module supports have the following features: 

Support HUAWEI PV modules.



Can be combined flexibly to reduce construction cost.



Can be adjusted to 15 degrees, 25 degrees, 35 degrees, or 45 degrees.

Scalable high supports help to save site space and prevent theft.

3.6 Remote Element Management Introduction The Power2000 can communicate with HUAWEI Network Ecosystem (NetEco) in in-band (over Huawei base stations) or out-of-band (by IP, GPRS, or SMS) mode for data transmission and remote monitoring. NOTE

GPRS stands for general packet radio service and SMS stands for short message service.

Features 

In out-of-band mode, the Power2000 communicates with an EMS over an OMU-B by GPRS or IP.



In in-band mode, the Power2000 communicates with an EMS over Huawei base stations and RS485 ports on the solar controller.



HUAWEI NetEco is supported.

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3 Power2000 Functions



Remote monitoring is supported.



Remote management of power supply reduces local maintenance and PMI, which decreases maintenance costs.



Real-time information uploading and alarm reporting help customers to understand the site status and potential risks, which improves power supply reliability.



Management and statistics collection help customers to analyze power supply problems, which facilitates network optimization and improves competitiveness.

3.7 PV Module Theft Detection Introduction PV module theft can be detected in real time and reported to the monitoring center over an EMS.

Features 

PV modules are costly and often stolen. Not only does theft bring financial loss, it can also cause load disconnection because of insufficient power. PV module theft detection, in addition to other antitheft measures, prevents PV modules from being stolen and protects customer investment.



An alarm is generated when a PV module is stolen.

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4 Configurations

4

Configurations

The Solar Power System consists of PV modules, PV module supports, solar controllers, junction boxes, storage batteries, and an OMU-B (optional). Error! Reference source not found. lists the solar controller models. Table 4-4 Bill of main material

No

Item

Description

Unit

Quantity

1

PV Module

PV Module,190Wp,

PCS

16

-40m/s,hot-dit-galvanized compliance with ISO1461-1999

SET

2

Support structure 2

Support Structure

3

Solar Power System Controller

SC4850E

PCS

1

5

Battery

48V,600Ah, battery group (2V cell)

SET

1

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5 Component Description

5

Component Description

5.1 PV Modules Function PV modules are important for light-to-electricity conversion in the Solar Power System and are resistant to corrosion, wind, and rain. PV modules are connected in series or parallel to meet load voltage and current requirements. Figure 5-1 shows a PV module. Figure 5-1 PV module

Features A PV module has the following features: 

Good light transmission



Double-layer solar cell, with high circuit reliability



Long service life (25 years)



Multi-layer polyolefin compressed circuit, which is moisture-proof, well-insulated and works stably under undervoltage conditions.

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5 Component Description

Certified by the Technical Watch-Over Association (TUV), underwriters laboratory (UL), International Organization for Standardization (ISO), Conformite Europeenne (CE), and International Electrotechnical Commission (IEC).

Technical Specifications Table 5-5 describes PV module technical specifications. Table 5-5 PV module technical specifications

Item

Specifications

Highest voltage for system networking

1000 V (PV modules used)

Peak power STC (Pm)

190 W

Optimal operating voltage

36.5 V

Optimal operating current

5.2 A

Open-circuit voltage

45.2 V

Short-circuit current

5.62 A

Operating temperature

–40°C to +85°C (–40°F to +185°F)

Operating humidity

5%–95% RH

Dimensions (L x W x H)

1580 mm x 808 mm x 35 mm (72.83 in. x 31.81 in. x 1.38 in.)

5.2 PV Module Supports A PV module support, consisting of a support and antitheft screws, is used to install PV modules. PV module supports are classified into standard supports, scalable low supports, and scalable high supports.

5.3 Solar Controller The solar controller, as the key component in the Solar Power System, controls the solar energy supplied to storage batteries and loads to ensure that they work in safe operating current and voltage ranges. Its performance affects the service life and efficiency of storage batteries. The solar controller monitors the Solar Power System, generates alarms for faults, and records and uploads alarm information. It is often installed outdoors.

5.3.1 SC4850E Figure 5-2 shows the SC4850E exterior and Figure 5-3 shows the SC4850E interior.

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5 Component Description

Figure 5-2 SC4850E exterior

Figure 5-3 SC4850E interior

NOTE

In Figure 5-3, SC4850E

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5 Component Description

5.4 OMU-B Introduction The OMU-B is a site monitoring transmission terminal. It allows the solar controller to communicate with an EMS by GPRS or IP to monitor power supply remotely. Figure 5-4 shows an OMU-B. Figure 5-4 OMU-B

Functions Table 5-6 describes the OMU-B functions. Table 5-6 OMU-B functions

Function

Description

Communications



Implements communication over the southbound RS485 port or SC48200O solar controller.



Communicates with the NetEco by GPRS, IP, or Huawei proprietary protocols.



Communicates with a PC by IP. OMU-B software can be upgraded or alarms can be queried on the web user interface (UI).

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5 Component Description

Function

Description

Computing



Calculates the real-time load power based on the load current and voltage uploaded by the solar controller.



Calculates backup time based on the preset battery capacity, load currents, and percentage of the remaining capacity to the total capacity.



Calculates the remaining fuel amount based on the fuel level reported by the solar controller. The prerequisite for the calculation is that the solar controller is configured with a fuel level sensor.

Performance data collection and reporting

Collects and reports the following performance data: 

Operating temperature



Busbar voltage



Output current



Daily peak PV voltage



DC load power consumption



Accumulated power consumption per hour



Maximum DC load power consumption per day



Minimum DC load power consumption per day



Accumulated power generation of the Solar Power System per hour

Alarm generation

Generates alarms for low fuel level and fuel addition.

Web UI

The following operations can be performed with a web UI: 

Query current alarm information.



Set network parameters for the communication by GPRS and IP.



Manage user information, such as changing user passwords.



Upgrade software online.



Query and export historical logs and alarms.



Query the OMU-B software version.

For details about the OMU-B, see the OMU-B User Manual.

5.5 Storage Batteries Storage batteries store electricity and power loads when solar energy is insufficient. Power2000 storage batteries are classified into solar cycle batteries (SCBs) SCBs

Introduction SCBs are applicable to the Solar Power System, Solar-D.G. Hybrid Power System, and Solar-wind Hybrid Power System. Issue Error! Unknown document property name. (2006-03-01)

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5 Component Description

Appearance Figure 5-5 shows an 800 Ah SCB. Figure 5-5 800 Ah SCB

Functions SCBs store energy and supply power when the main power source fails.

Features SCBs are developed by Huawei and has the following features: 

The service life of an SCB is longer than 20 years in floating charge mode. One SCB can be charged and discharged 1500 times when the DOD is 30% and the temperature is 35°C (95°F). By adopting the thick plate, Huawei-patent anticorrosive alloy, and 4BS diachylum technology, the SCB has the oxygen complex reaction efficiency record of more than 99%. This improves the service life of SCBs.



The SCB is sealed reliably to be free of acid leakage. Securely sealed terminals and valves and highly precise heat-seal acrylonitrile butadiene styrene resin (ABS) shell ensure no electrolyte leakage.



The factory capacity is more than 100% of the nominal capacity. The self discharge ratio within 30 days at 25°C (77°F) is less than 3%.



Electric charge is released within a long period of time, which makes SCBs applicable to the scenario with solar energy. The excellent shallow discharge performance allows for extra long cycle life with low electric charge.



Battery cables are insulated well and are of high quality. Battery terminals are properly connected to the connection bar and the connection resistance is very low. The connection bar is covered by rubber, which improves security.



The SCB is aesthetically designed and easy to install. The SCB uses the streamline design with matte color in appearance and modular design in structure.

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5 Component Description

Environmental Specifications Table 5-7 SCB environmental specifications

Item

Specifications

Operating temperature

Working for a long time at the temperature below 35°C (95°F) or for 500 hours at the temperature above 35°C (95°F)

Relative humidity

< 90% RH

Altitude

≤ 4000 m (13,123.2 ft)

Technical Specifications Table 5-8 SCB technical specifications

Batter y Type

Rated Voltag e

Rated Capacit y

Dimensions Depth (mm [in.])

Width (mm [in.])

Height (mm [in.])

Total Height (Includin g Terminal s, mm [in.])

SCB-6 00A

2

600

231 (9.09)

180 (7.09)

396 (15.59)

408 (16.06)

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Weight (kg [lb])

48 (105.84)

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6 Monitoring System

6

Monitoring System

Features 

Supports in-band and out-of-band communication.



Processes and stores bottom-layer data.



Transmits data in in-band (over Huawei base stations later than GBSS12.0 and the RS485 port on the solar controller) or out-of-band (by IP and GPRS) mode.



Works with HUAWEI NetEco.

Network Diagram The Power2000 can be networked in in-band or out-of-band mode. If the base station is manufactured by Huawei and of the version later than GBSS12.0, Power1000 V200R003 is networked in in-band mode, as shown in Figure 6-1. If the base station is not provided by Huawei or is of the version earlier than GBSS12.0, Power1000 V200R003 is networked in out-of-band mode, as shown in Figure 6-2. Figure 6-1 In-band monitoring network diagram

Figure 6-2 Out-of-band monitoring network diagram

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7 Acronyms and Abbreviations

Acronyms and Abbreviations

A ACM

ATS control module

ACDB

alternating current distribute box

APM

advanced power module

B BLVD

battery low voltage disconnection

BS

bypass switch

C CAPEX

capital expenditure

D DBS

distributed base station

DCB

deep cycle battery

DCDB

direct current distribute box

D.G.

diesel generator

DSAU

DCDB signal analysis unit

G GPRS

general packet radio service

GSM

Global System for Mobile Communications

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HCU

hybrid control unit

HPS

hybrid power system

7 Acronyms and Abbreviations

I IP

Internet Protocol

K kWh

kilowatt-hour

L LLVD

load low voltage disconnection

M MPPT

max power point track

MTBF

mean time between failures

N NetEco

Network Ecosystem

O OMU

operation management unit

OPEX

operational expenditure

P PSU

power supply unit

PMB

power monitor board

PMU

power monitor unit

R ROI

Return on Investment

S SCU

solar control unit

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SPD

surge protection device

SSR

solar supply rack

SSU

solar supply unit

7 Acronyms and Abbreviations

T TCO

Total Cost of Ownership

TNV

telecommunication network voltage

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