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Electrical Installation

6.1

Safety Instructions

6.1.1 Generals Rules

High voltage! Electrical shock hazards!

•

Do not touch the live components of the device.

•

Make sure the AC and DC sides are voltage-free before installation.

•

Never put flammable materials in the vicinity of the MV Station.

If a ground fault occurs in the PV system, some parts that are supposedly

voltage-free may carry lethal voltage. Accidental touch may cause serious

damage. Make sure there is no system ground fault before operation and take

proper protective measures.

•

Observe all the country-specific standards and regulations.

•

Connect the MV Station to public grid only after receiving authorization from
the local network operator.

Only professional electricians can perform the operations described in this

chapter.

Observe all the instructions during electrical connection.

Disconnect all AC and DC switches before electrical connection.

Содержание SG4950HV-MV

Страница 1: ...S St ta at tiio on nS Sy ys st te em m M Ma an nu ua allS SG G4 49 95 50 0_ _ 6 62 25 50 0_ _6 68 80 00 0H HV V M MV V S SE EN N V Ve er r2 26 6 2 20 02 21 11 12 2 SG4950_6250_6800HV MV SEN Ver26 2021...

Страница 2: ......

Страница 3: ...ault Protection 6 2 2 5 Live Line Measurement 6 2 2 6 Measuring Instrument 6 2 2 7 Volt free Operations 6 2 2 8 Danger from Electric Arc 7 2 2 9 ESD Protection 8 2 2 10 LCD Parameter Setting 8 2 2 11...

Страница 4: ...2 2 Hoisting 22 5 2 3 Fastening of Connectors 24 5 3 Foundation 25 5 3 1 Selection of Installation Site 25 5 3 2 Foundation Requirements 25 5 3 3 Recommended Foundation Construction Method 26 5 3 4 I...

Страница 5: ...7 3 Checking before Commissioning 47 7 3 1 Checking the Cable Connection 47 7 3 2 Checking the Module 47 7 3 3 Checking PV Array 48 7 3 4 Checking Grid Voltage 48 7 4 Preparation before Starting 49 7...

Страница 6: ...62 9 12 Load Default 62 9 13 Checking Firmware Version 63 9 14 Parameters of LCD 63 9 14 1 Communication Parameters 63 9 14 2 Running Parameters 64 9 14 3 Protection Parameter 64 10 Main Functions 65...

Страница 7: ...ature Protection 75 10 13 8 Internal Over temperature Protection 75 11 Troubleshooting 76 11 1 Safety Instructions 76 11 2 Checking Fault 76 11 3 Fault and Troubleshooting on the Inverter 77 11 4 Faul...

Страница 8: ...8 12 4 Painting Make up Measures 98 12 5 Replacement of the Electrical Components 102 12 5 1 Safety Instructions 102 12 5 2 Replace DC Fuses 102 13 Appendix 106 13 1 System Parameter 106 13 2 Tighteni...

Страница 9: ...rt installation and electrical connection of the MV Station Commissioning Safety notices and commissioning process when the MV Station is powered on for the first time Start Stop Steps to start and st...

Страница 10: ...commissioning Familiar with the country regional standards and specifications Familiar with this manual 1 4 Symbols Explanation This manual contains important safety and operational instructions that...

Страница 11: ...g the device Documents must be stored at hand and available at all times All rights reserved including the pictures markings and symbols used Any reproduction or disclosure even partially of the conte...

Страница 12: ...ad to personal injuries or device damages and may void pertinent warranty claims from Sungrow 2 2 Important Safety Instructions Read the safety instructions carefully before installing the MV Station...

Страница 13: ...d all the instructions thoroughly prior to any operation work on the MV Station Transport install maintain and service the MV Station by strictly following the descriptions in this manual Device damag...

Страница 14: ...below Instrument for measurement of the electrical parameters should be high quality instrument with sufficient measuring range Make sure the connection and use of the instrument are correct to avoid...

Страница 15: ...ve HV fuse on the MV Station DC side Touch possibly live cable end on which insulation processing is not performed Touch copper bars terminals or other internal components that may carry voltage The p...

Страница 16: ...tection Devices may be damaged irreversibly by electrostatic discharge ESD Avoid unnecessary touching of the PCB Observe all the ESD related safety instructions Wear proper PPE such as safety glasses...

Страница 17: ...the MV Station Take proper insulation protection measures during live line operation At least two persons are required until the operation is performed Proper field rescue facilities are required sinc...

Страница 18: ...are indicative only For details about the device refer to the actual product you receive Keep this manual at a convenience place near the device for future reference during installation operation main...

Страница 19: ...ts DC current generated from the PV array into grid compatible AC current which can be directly fed into the medium voltage grid 3 2 External Design of the MV Station 3 2 1 MV Station Views Four views...

Страница 20: ...tion is in alarm run mode FAULT Red A fault occurs and has not been removed The indicator will be off when the fault is cleared T Th he e E EM ME ER RG GE EN NC CY Y S ST TO OP P B Bu ut tt to on n Wh...

Страница 21: ...view of the major electrical components inside the MV Station N No o D De ev viic ce e D De es sc cr riip pt tiio on n A Inverter Convert the DC current generated from the PV array into AC current B M...

Страница 22: ...is shown below N No o N Na am me e D De es sc cr riip pt tiio on n A DC cable inlet DC cables connect to the inverter through these holes B AC cable outlet AC cables connect to the switchgear through...

Страница 23: ...the internal device The figure above is indicative only and actual product may differ N No o N Na am me e A Communication area including the communication devices B Isolate switch C Power distribution...

Страница 24: ...circuit breakers can be used together with a micro motor When there is the power supply on the AC side of the inverter the energy can be stored to the breaker through this motor When there is no powe...

Страница 25: ...ED Never manually connect the AC circuit breaker when the AC side carries voltage Switch off Press the Push OFF button on the breaker panel to switch off the breaker After the breaker is switched off...

Страница 26: ...55 M6 20 M5 16 E Spring washer M16 F Flat washer M16 G Nut M16 The foregoing components are based on the standard MV Station and those of the actual product may differ Specifically refer to the enclo...

Страница 27: ...f any damage is found contact the shipping company or Sungrow immediately Check the scope of delivery described in 4 1 Scope of Delivery for completeness Check that the MV Station and internal devices...

Страница 28: ...re is too low heat the MV Station internal devices Temperature 40 C 70 C Relative humidity 0 95 non condensation Store the MV Station in a dry clean and solid ground with sufficient load capacity The...

Страница 29: ...ly those safety instructions should be observed at all times All the accessory appliances to be used during transport should be maintained beforehand The transport of the MV Station must be performed...

Страница 30: ...s strictly forbidden Anybody standing under the boom or MV Station is strictly forbidden in the whole hoisting process The hoisting work must be stopped in violent weather days For example in strong w...

Страница 31: ...23 f fiig gu ur re e 5 5 1 1 Lifting by a single hoist f fiig gu ur re e 5 5 2 2 Lifting of two cranes The figure above is indicative only System Manual 5 Mechanical Installation...

Страница 32: ...Station in a vertical manner Do not drag or drop the MV Station on any surface When the MV Station has been hoisted for about 300mm from the ground stop to check if all the connections are still firm...

Страница 33: ...e mainly the geographical and environmental conditions Then design and construct the foundation Improper foundation construction may affect the place of the MV Station open close of the door and later...

Страница 34: ...uct the foundation F Fiix xiin ng g m me et th ho od d R Re ef fe er re en nc ce e Welding 5 3 3 1 Scheme 1 Fixing by Welding Welding and fastening 5 3 3 2 Scheme 2 Fixing by Welding and Fastening 5 3...

Страница 35: ...st tr ru uc ct tiin ng g t th he e F Fo ou un nd da at tiio on n It is recommended to construct the foundation as the following solution N No o N Na am me e D Embedded channel steel E Cushion include...

Страница 36: ...is used as an oil tray and the installation position of the oil water separator is reserved at the bottom of the MV Station as shown in figure A below There are two oil water separator installation p...

Страница 37: ...upposedly voltage free may carry lethal voltage Accidental touch may cause serious damage Make sure there is no system ground fault before operation and take proper protective measures Observe all the...

Страница 38: ...orm the electrical connection Professional electricians should meet the related requirements listed in 2 Safety Instructions in this manual Sungrow shall not be held liable for any personal injury or...

Страница 39: ...t instrument Ground and short circuit whenever necessary Cover possible live parts to avoid accidental contact 6 2 Preparation before Electrical Connections Electrical connections between devices insi...

Страница 40: ...insulation or damages in the cables may cause hazards Replace them if necessary 6 2 4 During Connection Make sure the DC cables are correctly routed before connection Do not pull the cables hard duri...

Страница 41: ...33 6 3 Circuit Diagram and Cable Connection 6 3 1 Circuit Diagram f fiig gu ur re e 6 6 1 1 Wiring scheme 1 f fiig gu ur re e 6 6 2 2 Wiring scheme 2 System Manual 6 Electrical Installation...

Страница 42: ...sformer 3 Switchgear 4 Intelligent PMD 6 3 2 Cable Specifications Choose cables according to the rules below All the cables must have sufficient ampacity The ampacity of the conductor can at least be...

Страница 43: ...ce es s All electrical devices inside the MV Station should be connected equipotentially through the total equipotential connection copper bar integrated into the PMD shown as A in the figure below Th...

Страница 44: ...at two points of the MV Station should be connected to the ground system of the PV plant G Gr ro ou un nd diin ng g iin nt te er rf fa ac ce e o op pt tiio on na all The grounding interface is compose...

Страница 45: ...evices must be carried out only after receiving approval from the distribution utility as required by national and state interconnection regulations Strictly follow all the instructions when connectin...

Страница 46: ...r cable use copper wiring terminals In case of aluminium cable use copper to aluminium adapter terminals The HV wiring terminal can be connected to a maximum of two cables corresponding to the right s...

Страница 47: ...the PV modules for possible ground fault Open circuit voltage of the PV array should not exceed the max DC voltage of the module The module may be damaged if otherwise If a ground fault is detected r...

Страница 48: ...ts s Use a cooper core an aluminium core cable For the cable specification please select according to the width of the copper bar and the size of the wiring hole as well as local regulations Fasten t...

Страница 49: ...ength 2cm longer than the depth of the cable lug is recommended 2 Wrap the cable lug with the heat shrink tubing 3 Shrink the tubing with hot air blower Cable protectors are advisable in the cable cro...

Страница 50: ...bolts with screwdriver or spanner step 6 Confirm that all cable connections are secure E En nd d Incorrect connection sequence may cause fire Pay maximum attention to the connection sequence Ensure th...

Страница 51: ...ommunication Connection on the Intelligent PMD optional optical fiber Refer to the manual of the corresponding device 6 7 1 Communication Connection on the Inverter RS485 ports and Ethernet port are r...

Страница 52: ...xternal Equipment Connection The lower part of the intelligent power distribution cabinet is the power distribution terminal and wiring area as shown in figure D below Select the corresponding ports f...

Страница 53: ...s are correct and firm Close the cable entries on the bottom of the module by following the reversed procedure in opening the cable entries The gap at the cable inlet outlet at the bottom and right of...

Страница 54: ...ation Grid connection of the MV Station can be performed only after receiving approval from the local utility grid company and by qualified personnel After the MV Station is operating make sure there...

Страница 55: ...sioning All commissioning operations must be performed only by qualified personnel Commission the device when it is sunny and the environmental conditions are stable to ensure the successful commissio...

Страница 56: ...mental condition is stable since the voltage of PV array may change with the solar radiation and the temperature of the PV cells Record the PV array status via the U 1 curve Commission the device when...

Страница 57: ...ed and all measured values lie within the acceptable range the device can be switched on for the first time Proceed as follows to start the MV Station step 1 Close the upstream and downstream switches...

Страница 58: ...onality of the LCD display Record accurately the module operation data during commissioning The duration of commissioning depends on the plant scale plant location on site environmental conditions and...

Страница 59: ...and professional test is necessary before starting the MV Station 8 1 2 Start Steps When the abovementioned conditions are fulfilled proceed as follows to start the MV Station step 1 Close the upstre...

Страница 60: ...normal maintenance and service work as follows step 1 Stop the MV Station through the stop instruction on the LCD panel step 2 Disconnect the DC side and auxiliary power supply switches step 3 Discon...

Страница 61: ...nditions stop the MV Station via the stop instruction on the LCD panel Press the emergency stop button immediately in case of emergency to make a timely response The emergency stop button will stay in...

Страница 62: ...e actual local time after time calibration check and replace the button cells on the back of the LCD panel 9 2 Default Screen 9 2 1 Initialization The LCD is initialized when the intelligent PMD is po...

Страница 63: ...nd Screensaver If no operation has been performed on the screen for more than 5 minutes the backlight will go off Tap the screen to activate the backlight so that the latest interface reappears 9 3 Ov...

Страница 64: ...t for the default menu N No o D De es sc cr riip pt tiio on n A Title bar The first line from the top is the present success rate of communication The left side of the second line is the name of the p...

Страница 65: ...rs running parameters protection parameters and communication parameters B Bu ut tt to on n F Fu un nc ct tiio on n Backspace key delete the digit input Clr Clear the digitals input Esc Escape and clo...

Страница 66: ...2 Shortcut The language setting shortcut shown by A is in the lower right corner of the Home menu Select either language by tapping the language button Language on the button is the present display l...

Страница 67: ...Station R Re ea all t tiim me e D Da at ta a The real time running information of the modules can be checked The output power DC voltage current power factor reactive power efficiency daily monthly a...

Страница 68: ...f the current event records Tap Prev or Next to turn pages up or down E En nd d 9 9 2 Checking History Data System can record the MV Station running information for the latest 90 days with the records...

Страница 69: ...enter into the history information sub menu step 3 Tap his alarm and enter into the history alarm sub menu History alarms can be viewed from this sub menu with up to 5 records can be shown in one page...

Страница 70: ...the MV Station through the LCD screen in either of the following manners Tap Start Stop from the default menu Tap Start Stop from the Function menu By tapping the start stop button on the screen all...

Страница 71: ...Communication Parameters Improper communication parameter configuration may lead to communication failure Follow strictly the instructions of the plant staff in configuring the communication paramete...

Страница 72: ...p ENTER to confirm setting Tap Prev or Next to turn pages up or down E En nd d 9 14 3 Protection Parameter S Se et tt tiin ng g P Pr ro ot te ec ct tiio on n P Pa ar ra am me et te er r step 1 Tap Fun...

Страница 73: ...onnections are disconnected The module is therefore electricity free I In niit tiia all S St ta an nd db by y When the module upstream and downstream connections are connected and the DC switches are...

Страница 74: ...Ru un n mode During this period if you want to start the module manually first confirm the stop clear protection program from the LCD panel and then start the module If the fault is unrecoverable stop...

Страница 75: ...screen Remote Local Both Remote and Local codes are effective Proceed to set the control strategy on the LCD screen as follows step 1 Tap Function from the default menu step 2 Tap Set parameter step 3...

Страница 76: ...ub menu and can be set accordingly 10 4 Reactive Power Adjustment MV Station can provide reactive power output User can open or close the reactive power adjustment switch and set the reactive power ou...

Страница 77: ...ge and duration when the voltage of the grid connected point drops due to the power system failure or disturbance PV plant can provide the dynamic reactive power support during the period A Ac ct tiiv...

Страница 78: ...er r S Sy ys st te em m requires PV plant should be able to operate as required within certain voltage range G Gr riid d c co on nn ne ec ct tiio on n p piin nt t v vo ollt ta ag ge e R Re eq qu uiir...

Страница 79: ...n will increase the fan speed for better heat dissipation The intelligent temperature control technology can synchronize the speed of fan and temperature of the IGBT module and thus optimize the modul...

Страница 80: ...Anti PID mode in the protection parameter of the MV Station is Repair when enabling the PID repair function If the MV Station is in deep standby state or the repair process is interrupted user can en...

Страница 81: ...itoring mode and negative pole grounding mode will be restored Manual mode Without shutdown conditions of the equipment on the touch screen parameters setup interface enable manual insulation monitori...

Страница 82: ...main switches of the MV Station E En nd d 10 13 Protection Function MV Station has complete protection functions to protect itself when input voltage or grid is abnormal until the anomaly is removed a...

Страница 83: ...Station permissible maximum input power MV Station will limit the power yield at maximum AC power point If the temperature exceeds the permissible value MV Station will automatically stop operating un...

Страница 84: ...onents from the same manufacturer The model number can be acquired from the marking of the MV Station or the component itself If otherwise contact Sungrow If the field work needs to replace the compon...

Страница 85: ...o the grid Minor Some components are faulty but the MV Station can still feed power to the grid Warning Functions of the MV Station are normal but the output power drops due to external factors The fa...

Страница 86: ...re inside the control cabinet Major 1 Check the grid voltage and inspect whether the grid voltage harmonic is normal 2 Check whether the fans operate normally 3 Check the AC filtering system and inspe...

Страница 87: ...k with a thermodetector whether the present ambient temperature is within the permissible range of the module 2 Check that the air inlets of the MV Station are not obstructed Replace the filters when...

Страница 88: ...er power outage occurs on the AC side 3 Check whether the AC circuit breakers of the module are connected Ctrol power supply flt The control power supply is abnormal Major 1 Check whether the control...

Страница 89: ...tact AC SPD flt The SPD on the AC side of the module is faulty Major 1 Refer to the measure for DC SPD flt 2 Check whether the micro circuit breaker connected in series to the SPD is disconnected 3 If...

Страница 90: ...I leakage pro The sampling value of the AC leakage currents exceeds the protective threshold Major 1 Check whether the AC cables are damaged 2 If the LV side of the transformer is connected in the Y t...

Страница 91: ...r AC switches are damaged 3 Check whether AC switches are connected disconnected normally 4 Check AC switches for conductivity with a multimeter Radiator over temp The temperature of the heat sink ins...

Страница 92: ...ty Replace the filters when necessary Anti PID power fit Anti PID power supply is abnormal Minor 1 Check the insulation of AC cables 2 Check AC SPD 3 Check the neutral point on the LV side of the tran...

Страница 93: ...securely fastened DC fuse abnorm al DC fuses of the inverter are abnormal Minor Check whether the DC fuse have blown If so contact Sungrow and replace the fuses Branch Fuse flt Branch fuses of the in...

Страница 94: ...ures for Branch breaker flt Check whether the DC switch is connected I leakage pro The sampling value of the AC leakage currents exceeds the protective threshold Major 1 Check whether the AC cables ar...

Страница 95: ...ngrow DC Sensor err DC sensors of the inverter are abnormal Minor Contact Sungrow Branch fwd Idc high Branch forward current is excessively high Minor Contact Sungrow Branch rev ldc high Branch revers...

Страница 96: ...Heavy gas trip The gas is excessively high and tripping occurs Major Contact Sungrow Trans oil T alarm The temperature in the oil tank of the transformer is abnormal and an alarm is triggered Minor Co...

Страница 97: ...LCD display and the DSP LCD power supply malfunction Check the connection between the LCD display and the DSP when the MV Station is voltage free Failure to communicate with PC Possible reasons are va...

Страница 98: ...eserved at all times 12 1 1 General Safety Rules Lethal voltage inside the MV Station Wait at least 20 minutes after MV Station stops before opening the cabinet door Make sure the device internal is c...

Страница 99: ...nment condition or long time operation however may cause age and damage of the MV Station Check and maintain the MV Station periodically and replace the aged components can effectively enlarge the ser...

Страница 100: ...work Make sure all bolts are securely fixed Repair immediately any anomalies found during routine maintenance If any doubts arise contact Sungrow M Ma aiin nt te en na an nc ce e o on nc ce e e ev ve...

Страница 101: ...tation are within normal ranges and dust the MV Station if necessary Check whether the air inlet and outlet are blocked Warning labels and marks Check whether the warning labels and marks are firmly a...

Страница 102: ...ign objects dirt or condensation inside the container Air inlet outlet Check whether the air inlet filters and ventilation ducts of the MV Station and its internal devices are normal and clean or repl...

Страница 103: ...Ma aiin nt te en na an nc ce e o on nc ce e e ev ve er ry y 6 6 m mo on nt th hs s t to o a a y ye ea ar r C Ch he ec ck k iit te em m C Ch he ec ck k m me et th ho od d Safety function Check the sto...

Страница 104: ...ing of the MV Station surrounding areas and the MV Station interior is important for the maintenance of the MV Station Due to ambient temperature humidity dust and vibration there may be dust depositi...

Страница 105: ...5 Checking and Cleaning the Filter 12 3 5 1 Filter Screen at Air Inlet B Br riie ef f I In nt tr ro od du uc ct tiio on n The air inlet is located at the top of the inverter It is recommended to clea...

Страница 106: ...ter 12 3 7 Checking the Lock and Hinge Check the functionality and state of the lock and hinge of the MV Station after the cleaning work Lubricate the lock and hinge if necessary 12 3 8 Checking the S...

Страница 107: ...be cleaned by water use 97 alcohol until the surface is clean enough to accept Or try other local frequently used non corrosiveness detergent M Ma aiin nt te en na an nc ce e a an nd d O Op pe er ra...

Страница 108: ...the surface is clean and dry paint the scratched parts of the paint by banister brush and make sure the painting is as uniform as possible M Ma aiin nt te en na an nc ce e a an nd d O Op pe er ra at t...

Страница 109: ...ean and dry paint the base material revealed parts with zinc primer or other local primers with the same function for protection The paints should cover the revealed primer completely 4 Paint the scra...

Страница 110: ...analysis and confirmation by Sungrow is needed Failure to follow this procedure may lead to physical injury or death and void all warranty from Sungrow 12 5 2 Replace DC Fuses Strictly observe the ins...

Страница 111: ...boxes upstream step 3 Disconnect the DC and AC side switches of the MV Station and auxiliary power supply switches and perform Step 4 about 20 minutes later when the capacitor inside the machine disch...

Страница 112: ...ch he em me e 1 1 F Fo or r t th he e H Ho olld de er r T Ty yp pe e D De es sc cr riip pt tiio on ns s F Fiig gu ur re e 1 As shown in the right figure identify the faulty fuse 2 Remove the fuse by...

Страница 113: ...g g T Ty yp pe e D De es sc cr riip pt tiio on ns s F Fiig gu ur re e 1 Unscrew fastening bolt of the to be replaced fuse with a socket spanner 2 Remove the fuse 3 Use M8 30 bolt to fasten new fuse wi...

Страница 114: ...C C AC output power 4950kVA 50 Max inverter output current 2 x2887 A Max AC output current 143A AC voltage range 20 kV 35 kV Nominal grid frequency Grid frequency range 50 Hz 45 55 Hz 60 Hz 55 65 Hz H...

Страница 115: ...al max 40 kVA Operating ambient temperature range 35 to 60 50 derating Allowable relative humidity range 0 100 Cooling method Temperature controlled forced air cooling Max operating altitude 1000 m st...

Страница 116: ...45 55 Hz 60 Hz 55 65 Hz Harmonic THD 3 at nominal power Power factor at nominal power Adjustable power factor 0 99 0 8 leading 0 8 lagging Feed in phases AC connection 3 3 PE E Ef ff fiic ciie en nc c...

Страница 117: ...ude 1000 m standard 1000 m optional Display Touch screen Communication Standard RS485 Ethernet Optional optical fiber Grid support Q at night Optional L HVRT active reactive power control and power ra...

Страница 118: ...hout authority Product malfunctions due to operation attached or neighboring devices running out of the allowed limit values Unforeseen calamity or force majeure The use of supplied software produced...

Страница 119: ...ervice greece sungrow co India Sungrow India Private Limited Gurgaon 9108041201350 service in sungrowpower com Italy Sungrow Italy Milano service italy sungrow co Japan Sungrow Japan K K Tokyo 81 3 62...

Страница 120: ...tative Bureau Istanbul 90 2127318883 service turkey sungrow co UK Sungrow Power UK Ltd Milton Keynes 44 0 0908 414127 service uk sungrow co U S A Mexico Sungrow USA Corporation PhoenixArizona 1833 747...

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