光伏电站运行维护手册-英文版.docx

Chinese government donate Solar Grid-Connected Electricity Generation Project in Tunisia Operation and Maintenance ManualYingli Energy (Beijing) Co., Ltd.July 2015Table of Contents1. General principle of operating and maintenance22. Inspection period and inspection organization structure72.1 Inspection period table73. Maintenance and repair for battery module83.1 Daily inspection93.2. Periodic inspection104. DC Power Distribution Cabinet Manual.114.1 Installation &Application scope114.2 Referencestandardandratingdate.124.3 Layoutfordistribution134.4 Operation.145. Grid connection inverter operation and maintenance procedures175.1. Operating process for booting:175.2 Shutdown process185.3 Maintenance process for inverter185.4 Common processing method for faulty machine196. Operation and maintenance procedures for AC distribution cabinet206.1, AC power distribution cabinet216.2 AC distribution cabinet into operation (first start)226.3 Stop maintenance for AC distribution cabinet221. General principle of operating and maintenance1. Purpose of creating this procedure: This procedure describes the daily operation and maintenance procedures and precautions for photovoltaic power station photovoltaic modules, inverters, and AC power distribution cabinet power equipment, as well as monitoring software settings, and serves as the general principle of attendant and maintenance personnel for operating and maintaining equipment in the photovoltaic power plant;2. This procedure applies to: photovoltaic power station attendant, maintenance personnel. They should be familiar with this procedure;3. Implement equipment management system strictly, arrange special personnel to manage the equipment, and equipment management personnel shall have appropriate qualifications;4. Equipment management personnel shall be familiar with the structure of power station system, and shall master testing and measurement methods for conventional components, such as open space, fuses, diodes etc;5. Equipment should be regularly checked, and See table 1 for detailed contents;6. During the normal operation of the equipment, it shall strictly control the operation against the equipment. When maintaining all equipment in the system service, it shall shut them down in advance, and then maintain until equipment stops working, and is prohibited maintaining when the equipment powers up;7. When maintaining the inverter, the maintenance against the equipment shall be carried out after 15 minutes when they are shut down, so as to avoid accidents caused by internal high pressure;8. Equipment downtime should strictly comply with equipment operating procedures;9. Equipment maintenance should be carried out by at least two people and they shall equip with insulating protective equipment, and shall strictly follow the maintenance procedures;10. Label shall be set when performing equipment maintenance operations to prevent accident by falsely switching;11. The site shall cleaned up after the completion of equipment maintenance, and equipment operating procedures shall be strictly followed when energizing;12. Each maintenance log shall be kept when performing the maintenance, and shall analyze causes of damage. The replaced components should be centrally stored and processed;13. For the accidents that the maintenance personnel can not handle, it shall timely report, and the fault model, equipment serial number and symptoms shall be recorded and delivered to manufacturers for processing so as to avoid further expansion of the fault;14. Flowchart for system downtimePress stop switch of AC power distribution cabinet, disconnect the circuit breaker in the side of PV output side (grid-side)Press shutdown key to operate and control inverterDisconnect the AC output breaker of inverterDisconnect the DC input breaker of inverterSystem downtime15. Flowchart for initial start systemWhen switching on (a single inverter will serve as an individual), the power transmission process is shown as follows:Closing the total PV system and network switchEnsure that the breaker in the PV output side (grid-side) for AC power distribution cabinet is switching on (Switch on if not) Switch on the breaker of AC distribution cabinetSwitch on AC output breaker of inverterSwitch on DC output breaker of inverterThe inverter is switched on and put into operationSwitching on all inverters according to the above process and complete the system boot.Note:1) During the boot process, the sequence for switching on AC breaker and DC breaker is not strictly defined. The switching of each breaker will not affect the normal grid connection of inverters. Generally, it shall first switch on the AC breaker and then DC breaker.2) When it is required to switch off the inverter, it is generally required to perform the shutdown operation through the menu on the LCD screen, then shut down according to the operation procedures. It prohibited switching off the AC and DC breaker, especially DC breaker, when the inverter system connects with the equipment with large power, which will cause permanent damage to DC breaker in severe cases.3) AC distribution cabinet will automatically disconnect when PV output side (grid side) is power off, and AC contactor will automatically switch on when PV output side (grid-side) is energized. When re-opening the inverter or finding fault, please first confirm that the PV output side (grid-side) breaker is disconnected.Table 1 ContentsS/n.ItemsContentsSitesNote1Visual inspectionWhether the appearance is damaged, each cable is connected properly and ground wire is connected.Bridge appearance, cables, terminals connections and cabinet appearance2JunctionWhether connections are secureJunction of inlet and outlet terminal, breaker, fuse holder, contactors and other electrical connections.Power off before checking3Check when the machine is runningHeating: The temperature for reactor and module is normal, the internal fan is operating normally, conductive connection is not producing heat and no heat waveJunction for reactor, modules and conductive cableOperation sound is normal, no abnormal sound and discharge soundContact point and breaker for contactor and connection points for conductive cable4Check after thunderstorm and grounding checkWhether the lightning protection device is damagedLightning protection device, grounding devicesTable 2 Common toolsS/n.Tool name1Digital Multimeter2Current clamp3Electrician combination tool4Megger5Ground resistance tester6Laptop7Ladder8Electrician insulated tools2. Inspection period and inspection organization structure2.1 Inspection period tableContentsInspection periodLess than 50KWp50KWp 1MWpMount PV modulesComponent surface cleanliness1 time/month1 time/weekComponent appearance, odor abnormal1 time/month1 time/weekwarning signs for electrified component1 time/month1 time/weekComponent grounding1 time/quarter1 time/monthModule temperature anomalies1 time/quarter1 time/monthModule string current consistency1 time/quarter1 time/monthSupporting structureSupporting structure connection1 time/six months1 time/monthSupporting structure corrosion protection situation1 time/six months1 time/monthbuilding material and building PV systemsAbnormal appearance1 time/quarter1 time/monthDrainage system1 time/quarter1 time/monthDoors and windows, hardware and bolts1 time/quarter1 time/monthSealant1 time/quarter1 time/monthPV array and building binding partPV array angle1 time/six months1 time/six monthsPV array overall situation1 time/six months1 time/six monthsAnchoring structures for photovoltaic systems1 time/six months1 time/six monthsForce components, link components and bolts1 time/six months1 time/six monthsPV systems around the situation1 time/six months1 time/six monthsDC combiner boxAbnormal appearance1 time/quarter1 time/monthTerminal abnormal1 time/quarter1 time/monthInsulation resistance1 time/year1 time/monthDC circuit breaker1 time/quarter1 time/monthSurge protector1 time/quarter1 time/monthDC fuse1 time/quarter1 time/monthInverterAbnormal appearance1 time/quarter1 time/monthWarning sign1 time/quarter1 time/monthCooling fan1 time/quarter1 time/monthbreaker1 time/quarter1 time/quarterBusbar capacitance temperature1 time/quarter1 time/monthPower quality1 time/2 years1 time/2 yearsGrounding and lightning protection systemsPV grounding system and building grounding device1 time/six months1 time/six monthsComponents, supporting structure, cable metal armor ground connection1 time/six months1 time/six monthsGrounding resistance for grounding wire1 time/six months1 time/six monthsOvervoltage protection1 time/six months1 time/six monthsLightning protection devices1 time/six months1 time/six monthsDistribution lineAC power distribution cabinet1 time/six months1 time/quartercable1 time/six months1 time/quarterData communication systemAbnormal appearance1 time/week1 time/weekTerminal display1 time/day1 time/daySensor sensitivity1 time/year1 time/yearAnalog digital converter (A/D) precision1 time/year1 time/yearService life of main components1 time/month1 time/month3. Maintenance and repair for battery moduleThe solar cell module is the most important part that determines power generation efficiency and capacity of entire system. The quality and adequacy maintenance of battery module will directly affect their life service.The system check will be carried out when the solar photovoltaic power generation system project is completed. In addition to visual inspection, the open circuit voltage of solar cell array, insulation resistance of each part shall be measured.The result for observation and measurement shall be kept and served as a reference for unusual circumstance found during future routine inspection and periodic inspection. Recommended inspection items: 1) Dirty and damage on the surface;2) Whether external wiring is damaged;3) Whether the bracket is corrosion and rust.3.1 Daily inspectionDaily inspection includes the visual inspection that is carried out each month. When it is considered abnormal, it may seek assistance from professionals. Table 1.1 Daily inspection itemsItemsVisual inspectionMeasurement experimentMeasureSolar cell moduleWhether the component surface is dirty or damageInsulation resistance measurementRegularly arrange staff to clean up the dirt on the surface of component, and contact the manufacturer timely if the damage is not artificialExternal wiring is damageOpen circuit voltage measurement (if necessary)Find breakage and insulate with insulating tapeWhether the bracket is corrosion, rustThe corrosion and rusty place have carried out rust removal and anticorrosive treatmentGround wire is damaged, the ground terminal is looseRepair grounding wire and secure ground terminal3.2. Periodic inspectionIn the special case of electrical equipment, periodic inspection in accordance with safety regulations is necessary. For the periodic inspection period, the number of inspection shall be issued in accordance with output capacity if Electric Security Association is commissioned. The installed capacity for power plant shall be greater than 100kW, and more than two checks shall be carried out each year, 1) Dirty and damage on the surface;2) Whether external wiring is damaged;3) Whether the bracket is corrosion and rust.Specific measure refers to Table 1.1Inspection and testing shall be carried out on the ground in principle. Depending on the individual system equipment installation environment and other reasons, the inspector can carry out the inspection on the roof after making security confirmation. If abnormal is found, seek advices from manufacturers and professional and technical personnel (and electrical technician related to power distribution).4.DC Power Distribution Cabinet Manual 4.1.Installation &Application scopeDC power distribution cabinet gathers and controls the direct circuit from the combiner box, which can be connected to the inverter or directly output to such as the inverter or battery. This cabinet is applicable to normal environment, rated insulation voltage is DC1250V, rated DC current is DC1000V, rated current to 630A to the PV DC power distribution system. The cabinet is an integrated intelligent DC power distribution unit which is used to the city PV power generation system, monitoring the data from each string, and uploading the data. Pollution level: 3 Elevation: no more than 2000m. The surroundings should be no explosive materials and combustible materials, should be no gas which can break the insulation and corrode the metal, should be no conductive dust. Installation place: should be no strenuous vibration and bump, the installation angle should be no more than 5%. The fluctuation range of the voltage is +/-10% float compared with the rated voltage. 4.2.Reference standard and rating date 2.1 Reference standard GB7521.1 Low voltage switchgear and control equipment, section 1: type approval test and partial type approval test equipment. GB7251.3 Low voltage switchgear and control equipment, section 3: low voltage switchgear and control equipment which allows non-professionals entering the working place.special requirement to the distribution board.：2.2 Rating dateRated insulation voltageDC1250Rated working voltageDC1000VTraveling wave current315ABranch current80ADC meter accuracy0.5 leverWorking environment temperature-2065Working environment humidity0-95%Protection LevelIP404.3.Layout for distribution1-DC Ammeter；2-AC Ammeter；3-Hall-sensor Power Supply Module；4-MainBreaker；5-Branch Breaker；6-DC meter Power Supply；7-Fan,Thermostat, Limit, Lamp power supply ；8-Incoming Line；9-Thermostat；4.4.OperationATTENTION！OPERATIONS TO THE DC POWER DISTRIBUTION CABINET MUST BE DONE BY THE PROFESSIONALS! Before the first use of the cabinet, please be sure to check the following items: all the components inside the cabinet are in good condition or not; connections between copper bars & connections between copper bar and cables are in good condition or not(to avoid dislocation); Cable connections are loose or not, dislocation or not. 4.4.1 BreakerSwitching on order：Main breakerBranch breakerPower micro turn-offTemperature control micro turn-offMeters micro turn-offSwitching off order ：Meters micro turn-offTemperature control micro turn offpower micro turn-offBranch breakerMain breaker4.4.2 DC Meters ParametersTechnical parametersnormMeasure outcomeRange for DC voltage 01000V（Access directly by power）Range for DC current09999A（Access by Hall-sensor）Measurement precision（more than）0.5 levelDisplay modeLEDWorking power85265VAC,50HZEnvironmentTemperatureWorking：-10+55；Storage：-20+70Humidity93%RH, no condensing, no corrosive gas KeySET：Functions switching or back to previous menu(normally, switch between read and prog)Left Key：submenu left shift or decreasing data；（combination meter, watt meter in normal condition, press left or right key to check the electric quantity）Right Key：submenu right shift or increasing data.Enter：entering to next level or confirmation. Menu symbols and meaning categorysymbolMeaning rangeMain menurEAdRead onlyAbbreviation：rdProgProgramming Abbreviation：pgTransformation ratio（ratio）PtMeasuring range for voltage Max 1000VCtCurrent ratio1-9999communicationAdCommunication address1247bdCommunication baud rate（bps）1200、2400、4800、9600,etccodePSProgramming protection passwordSet to 1122Note：because of the different models, some parameter settings have no meaning to the meters. Operation flow chart Layout 1: displaying flow chartlayout 2 : programming flow chartlayout 3: programming flow chart Note：1. rEAd read only，in this interface, press “enter” to access.2. Prog programming menu，in this interface, press “enter” to access.3. Prog- the left and right key can be switched to different parameters. Press “enter” key , it is lighting, and can be revised. If you press “SET” key, means discarding the revision, if you press “ENTER” key, means you confirm the revision, and then save.4.4.3 SPDThe SPD in this DC power distribution cabinet is with a window, and in normal condition the window is green. After it is struck by lighting the window is turning to red. Then you need to replace the lightning protection module or the whole set SPD.5. Grid connection inverter operation and maintenance proceduresGrid connection inverter is the important electrical equipment in the photovoltaic power generation system. Procedures shall be strictly followed when operating and inspecting the equipment, and operation and maintenance shall be carried out periodicallyThe inverter operation flow can refer to this process. For detailed operating procedures and performance parameters, please refer to SG100K3s relevant parameter in the product manual.5.1. Operating process for booting:Before starting, it is recommended to use multimeter to test the voltage in the DC side and AC side and verify the conditions f