A Acronyms and Abbreviations

Power2000Solution Description7 Acronyms and Abbreviations

Huawei Solar Hybrid Technical Proposal(Pure Solar)

2012-12-9Huawei Technologies Co., Ltd.

Internal

Technical Proposal of the Power2000 Solar Power Solution for the XX Project (V1.0)INTERNAL

PowerCube 1000 V300R002 Technical Proposal(Pure Solar)

2012-12-9Huawei Confidential No spreading without permissionPage 2 of 24

ContentsAbout This Documentii1 Power2000 Overview11.1 Positioning11.2 Benefits12 Application Scenarios33 Power2000 Functions63.1 Power Supply63.2 Power Distribution63.3 Protection73.4 Alarm Generation83.5 PV Module Support83.6 Remote Element Management93.7 PV Module Theft Detection94 Configurations105 Component Description115.1 PV Modules115.2 PV Module Supports125.3 Solar Controller125.3.1 SC4850E135.5 OMU-B175.6 Storage Batteries185.6.1 SCBs196 Monitoring System23A Acronyms and Abbreviations24

ContentsPower2000Solution Description

Power2000Solution DescriptionContents

1 Power2000 Overview1.1 PositioningThe 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 BenefitsEnvironmentally FriendlyThe eco-designed Power2000 effectively uses renewable energy such as solar and wind energy to reduce greenhouse gas emissions.Low OPEXRenewable resources are used, saving energy while reducing emissions without extra energy costs.Easy MaintenancePhotovoltaic (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 MonitoringThe Power2000 monitors site status and environments remotely and transmits monitoring data over dry contacts.Modular DesignThe Power2000 adopts a modular design, which facilitates installation, capacity expansion, and maintenance.Various Application ScenariosThe Power2000 is not only applicable to mainstream base stations, but also applicable in remote areas such as islands, deserts, and undeveloped villages.1 Power2000 Overview

Power2000Solution Description2 Application Scenarios

1Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd (2011-09-13)

Issue 03 (2011-09-13)Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd3

2 Application ScenariosThe Power2000 uses the Solar Power System to supply power.FeaturesThe 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 SystemEnergyPower Supply SystemApplicable ConditionFeature

Solar energySolar Power SystemAverage amount of daily sunshine in a year is longer than 3 hours.The load power is medium or small and no mains is provided.The site is unattended.The solar power cabinet is installed outdoors.The recommended direct current (DC) load power is 1000 W or lower.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.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.

Network DiagramPV 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 2-2 Solar Power System with junction boxes

Figure 2-2 shows the network diagram for the Solar Power System without junction boxes.Figure 2-3 Solar Power System with one solar controller

Figure 2-4 Solar Power System with two solar controllers

Table 2-2 Mapping between Solar Power Systems and Load PowerSolar Power SystemLoad PowerRemarks

With one solar controller700 W (5.5 hours per day)A single load route: 550 W

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

1 Power2000 Overview

1Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd (2011-09-13)

3 Power2000 Functions3.1 Power SupplyIntroductionPower is supplied by the Solar Power System.Features48 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 DistributionIntroductionControl systems distribute power for power inputs, storage batteries, and loads. Extra power distribution equipment is not required, which reduces costs and facilitates site setup.FeaturesAll controllers perform power distribution. See Table 3-1 for details.Table 3-3 Power distribution specificationsModelPV Input RouteLoad RouteBattery Route

SC4850ENine bare crimp terminals, total rating input current is 50A,overcurrent threshold is 55Aone 25 A circuit breaker, two 10 A circuit breakers, and one 6 A circuit breakerOne 100 A circuit breaker

3.3 ProtectionIntroductionProtection 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).FeaturesReverse polarity protection for storage batteriesBattery overvoltage protectionBattery overtemperature protectionLLVD protection3.4 Alarm GenerationIntroductionWhen an alarm is generated, maintenance personnel rectify faults immediately. Alarm records help to identify faults, improving maintenance efficiency.FeaturesOutput overvoltageOutput undervoltageLLVDBLVDBattery high temperaturePower2000 faultyLoad fuse blownBattery fuse blownSurge protection device (SPD) faultyPV array faultyPV array lostControlling panel fault alarmInput power board short-circuitedInput power board open-circuitedLoad overcurrentDry contact input faultyIn 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 SupportIntroductionPV 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.FeaturesPV 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 ManagementIntroductionThe 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.

GPRS stands for general packet radio service and SMS stands for short message service.FeaturesIn 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.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 DetectionIntroductionPV module theft can be detected in real time and reported to the monitoring center over an EMS.FeaturesPV 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.2 Application Scenarios

1Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd (2011-09-13)

4 ConfigurationsThe Solar Power System consists of PV modules, PV module supports, solar controllers, junction boxes, storage batteries, and an OMU-B (optional). Table 4-1 lists the solar controller models.Table 4-4 Bill of main materialNoItemDescriptionUnitQuantity

1PV ModulePV Module,190Wp,PCS16

2Support StructureSupport structure -40m/s,hot-dit-galvanized compliance with ISO1461-1999SET2

3Solar Power System ControllerSC4850EPCS1

5Battery48V,600Ah, battery group (2V cell) SET1

3 Power2000 Functions

1Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd (2011-09-13)

5 Component Description5.1 PV ModulesFunctionPV 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 5-5 PV module

FeaturesA PV module has the following features:Good light transmissionDouble-layer solar cell, with high circuit reliabilityLong service life (25 years)Multi-layer polyolefin compressed circuit, which is moisture-proof, well-insulated and works stably under undervoltage conditions.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 SpecificationsTable 5-1 describes PV module technical specifications.Table 5-5 PV module technical specificationsItemSpecifications

Highest voltage for system networking1000 V (PV modules used)

Peak power STC (Pm)190 W

Optimal operating voltage36.5 V

Optimal operating current5.2 A

Open-circuit voltage45.2 V

Short-circuit current5.62 A

Operating temperature40C to +85C (40F to +185F)

Operating humidity5%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 SupportsA 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 ControllerThe 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 SC4850EFigure 5-4 shows the SC4850E exterior and Figure 5-5 shows the SC4850E interior.Figure 5-6 SC4850E exterior

Figure 5-7 SC4850E interior

In Figure 5-5, SC4850E

5.4 OMU-BIntroductionThe 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 5-8 shows an OMU-B.Figure 5-8 OMU-B

FunctionsTable 5-3 describes the OMU-B functions.Table 5-6 OMU-B functionsFunctionDescription

CommunicationsThe OMU-B performs the following communications functions: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).

ComputingThe OMU-B performs the following computing functions: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 reportingCollects and reports the following performance data:Operating temperatureBusbar voltageOutput currentDaily peak PV voltageDC load power consumptionAccumulated power consumption per hourMaximum DC load power consumption per dayMinimum DC load power consumption per dayAccumulated power generation of the Solar Power System per hour

Alarm generationGenerates alarms for low fuel level and fuel addition.

Web UIThe 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 BatteriesStorage batteries store electricity and power loads when solar energy is insufficient.Power2000 storage batteries are classified into solar cycle batteries (SCBs) SCBsIntroductionSCBs are applicable to the Solar Power System, Solar-D.G. Hybrid Power System, and Solar-wind Hybrid Power System.AppearanceFigure 5-9 shows an 800 Ah SCB.Figure 5-9 800 Ah SCB

FunctionsSCBs store energy and supply power when the main power source fails.FeaturesSCBs 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 35C (95F).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 25C (77F) 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.Environmental SpecificationsTable 5-7 SCB environmental specificationsItemSpecifications

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

Relative humidity< 90% RH

Altitude 4000 m (13,123.2 ft)

Technical SpecificationsTable 5-8 SCB technical specificationsBattery TypeRated VoltageRated CapacityDimensionsWeight (kg [lb])

Depth (mm [in.])Width (mm [in.])Height (mm [in.])Total Height (Including Terminals, mm [in.])

SCB-600A2600231 (9.09)180 (7.09)396 (15.59)408 (16.06)48 (105.84)

4 Configurations

1Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd (2011-09-13)

6 Monitoring SystemFeaturesSupports 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 DiagramThe 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 6-10 In-band monitoring network diagram

Figure 6-11 Out-of-band monitoring network diagram

5 Component Description

1Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd (2011-09-13)

Acronyms and AbbreviationsA

ACMATS control module

ACDBalternating current distribute box

APMadvanced power module

B

BLVDbattery low voltage disconnection

BSbypass switch

C

CAPEXcapital expenditure

D

DBSdistributed base station

DCBdeep cycle battery

DCDBdirect current distribute box

D.G.diesel generator

DSAUDCDB signal analysis unit

G

GPRSgeneral packet radio service

GSMGlobal System for Mobile Communications

H

HCUhybrid control unit

HPShybrid power system

I

IPInternet Protocol

K

kWhkilowatt-hour

L

LLVDload low voltage disconnection

M

MPPTmax power point track

MTBFmean time between failures

N

NetEcoNetwork Ecosystem

O

OMUoperation management unit

OPEXoperational expenditure

P

PSUpower supply unit

PMBpower monitor board

PMUpower monitor unit

R

ROIReturn on Investment

S

SCUsolar control unit

SPDsurge protection device

SSRsolar supply rack

SSUsolar supply unit

T

TCOTotal Cost of Ownership

TNVtelecommunication network voltage