Sungrow SG4950HV-MV User guide

SSGG44995500HHVV--MMVV//SSGG66225500HHVV--MMVV//SSGG66880000HHVV--MMVV MMVV TTuurrnnkkeeyy
SSttaattiioonnSSyysstteemm MMaannuuaallSSGG44995500__
66225500__66880000HHVV--MMVV--SSEENN--VVeerr2266--
220022111122
SG4950_6250_6800HV-MV-SEN-Ver26-202112
SG4950HV-MV/SG6250HV-MV/SG6800HV-MV
MMVV TTuurrnnkkeeyy SSttaattiioonn
SSyysstteemm MMaannuuaall

I
CCoonntteennttss
1 About This Manual ....................................................................................... 1
1.1 Validity ........................................................................................................ 1
1.2 Content........................................................................................................ 1
1.3 Target Group................................................................................................ 1
1.4 Symbols Explanation.................................................................................... 2
1.5 How to Use this Manual................................................................................ 3
1.6 Terminology................................................................................................. 3
2 Safety Instructions ...................................................................................... 4
2.1 Intended Usage............................................................................................ 4
2.2 Important Safety Instructions........................................................................ 4
2.2.1 General Safety Rules .......................................................................... 4
2.2.2 Manual Storage.................................................................................. 5
2.2.3 PV Arrays Hazards.............................................................................. 5
2.2.4 Ground Fault 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 Sand and Moisture Protection........................................................... 8
2.2.12 Symbols on the Device Body............................................................. 8
2.2.13 Safety Warning Signs ....................................................................... 9
2.2.14 Daily Operation and Maintenance ..................................................... 9
2.2.15 Disposal of Waste........................................................................... 10
2.2.16 Manual Description......................................................................... 10
3 Product Description .................................................................................. 11
3.1 Brief Introduction........................................................................................ 11
3.2 External Design of the MV Station............................................................... 11
3.2.1 MV Station Views.............................................................................. 11
3.2.2 Mechanical Parameter...................................................................... 12

II
3.2.3 Ventilation Design............................................................................. 13
3.3 Internal Design of the MV Station................................................................ 13
3.3.1 Internal Components ........................................................................ 13
3.3.2 Cable Entry Design ........................................................................... 14
3.3.3 Internal Devices of the MV Station..................................................... 14
3.3.4 Operations on the DC and AC Side.................................................... 15
4 Delivery ......................................................................................................... 18
4.1 Scope of Delivery....................................................................................... 18
4.2 Identifying the MV Station........................................................................... 18
4.3 Checking for Transport Damages ............................................................... 19
4.4 Storage of the MV Station........................................................................... 20
5 Mechanical Installation ............................................................................ 21
5.1 Transport ................................................................................................... 21
5.2 Hoisting the MV Station .............................................................................. 22
5.2.1 Safety Precautions ........................................................................... 22
5.2.2 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 Installating Oil-Water Separator(Optional) ......................................... 28
6 Electrical Installation ................................................................................ 29
6.1 Safety Instructions...................................................................................... 29
6.1.1 Generals Rules ................................................................................. 29
6.1.2 Five Safety Rules.............................................................................. 31
6.2 Preparation before Electrical Connections .................................................. 31
6.2.1 Installation Tools ............................................................................... 31
6.2.2 Opening the MV Station Door............................................................ 32
6.2.3 Checking the Cables......................................................................... 32
6.2.4 During Connection............................................................................ 32
6.3 Circuit Diagram and Cable Connection ....................................................... 33
6.3.1 Circuit Diagram................................................................................. 33
6.3.2 Cable Specifications......................................................................... 34
6.4 Ground Connection.................................................................................... 35
6.5 AC Connection........................................................................................... 37

III
6.5.1 Safety Instructions............................................................................ 37
6.5.2 AC Cable Connection........................................................................ 37
6.6 DC Connection........................................................................................... 39
6.6.1 Checking before Connection............................................................. 39
6.6.2 DC Cable Connection ....................................................................... 40
6.7 Communication Connection ....................................................................... 43
6.7.1 Communication Connection on the Inverter....................................... 43
6.7.2 Communication Connection on the Intelligent PMD(optional)............. 43
6.8 External Equipment Connection ................................................................. 44
6.9 Finishing Electrical Connection................................................................... 45
7 Commissioning ........................................................................................... 46
7.1 Safety Instructions...................................................................................... 46
7.2 Requirements of Commissioning ................................................................ 47
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
7.5 Starting the Device..................................................................................... 49
7.6 LCD Parameter Setting............................................................................... 50
7.7 Completing Commissioning........................................................................ 50
8 Starting/Stopping ...................................................................................... 51
8.1 Starting ...................................................................................................... 51
8.1.1 Inspection before Starting................................................................. 51
8.1.2 Start Steps ....................................................................................... 51
8.2 Stopping .................................................................................................... 52
8.2.1 Normal Stop ..................................................................................... 52
8.2.2 Stop in Case of Fault......................................................................... 52
9 LCD Menu Operation ................................................................................ 54
9.1 LCD Touch Screen ..................................................................................... 54
9.2 Default Screen ........................................................................................... 54
9.2.1 Initialization....................................................................................... 54
9.2.2 Default Screen Introduction .............................................................. 54
9.2.3 Backlight and Screensaver ............................................................... 55
9.3 Overview of LCD Menu and Icon ................................................................ 55

IV
9.3.1 Overview of Submenu and Icon ........................................................ 55
9.3.2 Layout of the submenus ................................................................... 56
9.4 Entering Password..................................................................................... 57
9.5 Setting Language....................................................................................... 58
9.5.1 Conventional Way............................................................................. 58
9.5.2 Shortcut ........................................................................................... 58
9.6 Setting Date and Time ............................................................................... 58
9.7 Energy Output Deviation Adjustment .......................................................... 59
9.8 Checking Running Information ................................................................... 59
9.9 Checking History Information ..................................................................... 60
9.9.1 Checking History Event .................................................................... 60
9.9.2 Checking History Data ..................................................................... 60
9.9.3 Checking History Fault ..................................................................... 60
9.9.4 Checking History Alarm .................................................................... 61
9.10 Checking Present Fault Information ......................................................... 61
9.11 Starting/Stopping..................................................................................... 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
10.1 Operation Mode....................................................................................... 65
10.1.1 Mode Change................................................................................. 65
10.1.2 Operation Mode Description ........................................................... 65
10.2 Complete Control Strategy(Optional) ........................................................ 67
10.3 Active Power Limitation ............................................................................ 67
10.3.1 Introduction to Active Power Limitation............................................ 67
10.3.2 How to Realize Power Limitation ..................................................... 68
10.4 Reactive Power Adjustment ..................................................................... 68
10.5 Low Voltage Ride Through (LVRT) ............................................................ 69
10.6 High Voltage Ride Through (HVRT) ........................................................... 70
10.7 MPPT....................................................................................................... 71
10.8 Intelligent Temperature-Control Technology ............................................. 71
10.9 Anti-PID Effect Function (Optional)........................................................... 71
10.9.1 Introduction to PID Effect ................................................................ 71

V
10.9.2 Anti-PID Function Setting................................................................ 72
10.9.3 PID Repair ...................................................................................... 72
10.10 Insulation Monitoring Function................................................................ 73
10.10.1 Introduction .................................................................................. 73
10.10.2 Simple Troubleshooting ................................................................ 73
10.11 Emergency Stop Button functions .......................................................... 74
10.12 Tripping Functions of the DC Main Switches ........................................... 74
10.13 Protection Function................................................................................ 74
10.13.1 DC Over-voltage Protection .......................................................... 74
10.13.2 AC Over/under-voltage Protection ................................................ 74
10.13.3 Frequency Anomaly Protection..................................................... 74
10.13.4 Islanding Protection ...................................................................... 75
10.13.5 Overload Protection ..................................................................... 75
10.13.6 Ground Protection ........................................................................ 75
10.13.7 Module Over-temperature 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 Fault and Troubleshooting on the MV Transformer.................................... 87
11.5 Other Fault and Troubleshooting .............................................................. 89
12 Routine Maintenance ............................................................................. 90
12.1 Safety Instructions.................................................................................... 90
12.1.1 General Safety Rules ...................................................................... 90
12.1.2 Five Safety Rules............................................................................ 91
12.2 Maintenance............................................................................................ 91
12.2.1 Introduction .................................................................................... 91
12.2.2 Maintenance Interval ...................................................................... 91
12.3 Cleaning the MV Station ........................................................................... 96
12.3.1 Introduction .................................................................................... 96
12.3.2 Cleaning Interval............................................................................. 96
12.3.3 Cleaning the Internal Dust ............................................................... 97
12.3.4 Cleaning the Foundation................................................................. 97
12.3.5 Checking and Cleaning the Filter .................................................... 97
12.3.6 Cleaning the Surface of the MV Station ........................................... 98

VI
12.3.7 Checking the Lock and Hinge ......................................................... 98
12.3.8 Checking the Sealing Strip .............................................................. 98
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 Tightening Torques................................................................................. 109
13.3 Exclusion of Liability ............................................................................... 109
13.4 Contact Information ............................................................................... 110

1
1 About This Manual
1.1 Validity
This manual is intended for the following product
•SG4950HV-MV
•SG6250HV-MV
•SG6800HV-MV
Hereinafter it will be referred to as " MV Station" unless otherwise specified.
1.2 Content
This manual contains the following information:
CCoonntteenntt DDeessccrriippttiioonn
Safety
instruction
Safety instructions concerning the installation, operation,
maintenance and troubleshooting of the MV Station
Product
Description The appearance and internal components of the MV Station
Delivery Delivery and inspection after receiving the MV Station
Installation Mechanical transport, 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 stop the MV Station internal devices during
normal maintenance or troubleshooting
Operation of
LCD Display Function and use of the MV Station HMI
Functions Descriptions of the MV Station main functions
Troubleshooti-
ng Simple troubleshooting of the MV Station
Daily operation Instructions and guide of the daily operation of the MV Station
1.3 Target Group
This manual is for technical personnel who are responsible for the transport, installation
and other operations of the MV Station. Only qualified personnel can perform the
installation, maintenance and troubleshooting of the MV Station. Unauthorized persons

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should not perform any operation on the MV Station and should be away from the MV
Station to avoid potential hazards. Qualified personnel are:
•Equipped with certain electrical, electrical wiring and mechanical knowledge and
familiar with electrical and mechanical principle diagram.
•Familiar with the construction and working principle of the PV grid-connected power
generation system.
•Familiar with the construction and working principle of the MV Station upstream and
downstream equipment.
•Trained specifically for electrical device installation and commissioning.
•Equipped with the ability to cope with the dangerous and emergency situations
during installation and 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 must be
accurately understood and respected during the installation and maintenance of the
equipment.
To ensure the optimum use of this manual, note the following explanations of the
symbols used.
DANGER indicates a hazard with a high level of risk which, if not avoided, will
result in death or serious injury.
WARNING indicates a hazard with a medium level of risk which, if not avoided,
could result in death or serious injury.
CAUTION indicates a hazard with a low level of risk which, if not avoided, could
result in minor or moderate injury.
NOTICE indicates a situation which, if not avoided, could result in equipment or
property damage.
1 About This Manual System Manual

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NOTE indicates additional information, emphasized contents or tips to help
you solve problems or save time.
The symbols below may be found on the electrical parts of the device. Make sure to
read the following symbols and fully understand them before installing the equipment.
SSyymmbbooll EExxppllaannaattiioonn
Lethal voltage inside! Do not touch!
Hot surface! Do not touch the hot surface of the device.
Protective earth. Earthing securely to ensure personal safety.
1.5 How to Use this Manual
Read this manual and other related documents before transporting and installing 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 contents of this manual is strictly forbidden without
prior written authorization of Sungrow.
The contents of the manual will be periodically updated or revised due to the product
development. It is probably that there are changes of manual in the subsequent edition.
1.6 Terminology
NNaammee FFoorr sshhoorrtt
MV Turnkey Station MV Station
Module unit/ Inverter unit Inverter
Intelligent power distribution cabinet Intelligent PMD or PMD
The foregoing devices are expressed in the abbreviation form in this document unless
otherwise specified.
System Manual 1 About This Manual

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2Safety Instructions
2.1 Intended Usage
The MV Station, designed and manufactured by Sungrow, is mainly applied to large-
and-medium PV power stations. The MV Station can meet the requirements of modular
design and quick installation for large-and-medium PV power stations, and can ensure
long-term, reliable, and safe feed-in operation.
Installation of the MV Station not in compliance with the description in this
manual or installation or modification of the device without authorization from
Sungrow may lead 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. Refer to
corresponding manuals for the safety instructions on the internal devices.
2.2.1 General Safety Rules
Touching of the terminals or contactors connected to the grid may lead to
electric shock hazards!
•Do not touch the terminals or conductors connected to the grid.
•Respect all safety instructions on the grid connection.
Lethal voltages are present inside the device!
•Pay attention and follow the warning signs on the device.
•Respect all safety instructions in this manual and other pertinent documents.

5
Electric shock or fire may occur due to the device damage or system fault.
•Visual inspect for device damages or other hazards
•Check if the external devices and circuit connections are safe.
•Only operate the device when it is safe to do so.
All installations and operations on the MV Station must be in full accordance to
the national and local regulations and standards.
2.2.2 Manual Storage
Product manuals are indispensable part of the product. Very important information
about the transport, installation, maintenance and troubleshooting of the MV Station is
included in this manual. All the descriptions in this manual, especially those safety-
related items, must be complied with. Read 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 damage, personal injury, or property loss may be
caused if otherwise
•This manual and relevant documents should be available for relevant persons at all
times.
2.2.3 PV Arrays Hazards
DC high voltage! Electric shock hazards!
When exposed to sunlight, PV array will produce voltage, which is very high in
large-scale power stations.
Death from burning and electric shock due to touching the PV array
During installation, maintenance and troubleshooting of the device, ensure:
•Station is disconnected from the PV array.
•Necessary warning signs are in place to prevent accidental reconnection.Necessary
warning signs are in place to prevent accidental reconnection.
System Manual 2 Safety Instructions

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2.2.4 Ground Fault Protection
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 protection measures.
2.2.5 Live Line Measurement
High voltages are present inside the device. Death resulting from burning and
electric shock upon touching the live components of the MV Station. During live
line measurement,
•wear suitable protective equipment, for example dielectric gloves, and
•accompany by other persons.
2.2.6 Measuring Instrument
Instrument for measurement of the electrical parameters should meet the requirements
listed 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 arc
and other dangerous situations.
•Use suitable protective equipment, for example dielectric gloves if live line
measurement is required.
2.2.7 Volt-free Operations
Perform operations on the MV Station only when all devices inside the MV Station, esp.
the modules are completely voltage free.
•Avoid any accidental re-connections.
•Verify that no voltage or current is present with appropriate measurement instrument
•Ground and short-circuit whenever necessary.
•Cover possible live parts to avoid accidental contact.
•Ensure sufficient escape room.
•Wait at least 20 minutes to have the capacitors discharge completely before
performing operations on internal components.
2 Safety Instructions System Manual

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2.2.8 Danger from Electric Arc
To avoid personal injury or device damage, perform operations on the MV
Station as described in this manual. Incorrect operations may cause electric
arcs or even fires, explosion, and other dangers. Sungrow shall not be held liable
for such damage due to violations of warning labels or description in this
manual.
The following improper operations may result in the electric arc, fire, explosion, or other
dangers. Once the faults occur, only qualified personnel can perform related operations
for improper operation may worsen the situation.
•Plug/Unplug live 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 power cable is not securely connected
•Spare parts, such as screws, are left inside the power module
•Improper operations performed by untrained or unqualified personnel
Evaluate in advance whether the electric arc is likely to occur in the operation area
before performing operations on the device. If there is the risk, it is required that:
•The operator must have received related safety training
•Identify the specific electric arc area as far as possible
•Wear protective equipment that meets the requirement before performing
operations in the area
System Manual 2 Safety Instructions

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EElleeccttrriicc AArrcc RRiisskk oonn tthhee MMVV SSiiddee
•Electric arcs can be caused by fault in the switchgear during operation. This
electric arc may cause personal injury
•If arc faults occur in the switchgear, the (SF6) gas evacuates under the
compartment of the switchgear.
•Only perform operation on the switchgear when it is voltage-free.
•Keep a safe distance from the switchgear when performing switching
operations on the switchgear.
•Only qualified personnel can perform the switching operation. Wear required
protective equipment before the operation.
•Ensure the escape route inside the switchgear room is freely accessible at all
times without any blocks or obstructions. Remove the blocks or obstructions
if necessary.
2.2.9 ESD Protection
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, safety footwear, and safety gloves.
2.2.10 LCD Parameter Setting
Some settable parameters on the LCD are closely related to the operations of the MV
Station and internal devices. Therefore these parameters can only be set after reliable
evaluation of the system.
•Improper parameter setting may affect the functionality of the device.
•Only qualified personnel can set the parameters.
2.2.11 Sand and Moisture Protection
Do not open the MV Station door in sand storm, thunderstorm, strong wind or hail days
or when the ambient humidity is above 95%.
2.2.12 Symbols on the Device Body
Symbols on the devices body contain important information on the safe operation of the
MV Station and its internal devices. Do not tear or damage them!
2 Safety Instructions System Manual

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Do not damage or tear the symbols.
•All symbols on the device body must be clearly visible.
•Replace the symbols once any damaged or unclearness is detected.
2.2.13 Safety Warning Signs
During transport, installation, maintenance and troubleshooting of the MV Station, keep
non-related persons away.
•Post warning signs near the MV Station upstream and downstream switches to
prevent accidental connection.
•Place necessary warning signs or barriers near the on-site operation areas.
2.2.14 Daily Operation and Maintenance
Make sure the MV Station doors are closed and locked during daily operation to prevent
internal devices from damages by rain or rodents.
Routine check and maintain the MV Station and internal devices to ensure long and
reliable operation of 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 since most PV stations are installed in
places far away from the urban areas.
The pressure relief valve of the transformer must be open before the running of
switchgear.
Take the followings into consideration during daily operation and maintenance:
•The nameplate is pasted on the MV Station body. It contains very important
parameter information about the devices. Protect the nameplate during all
operations.
•Heating components may exist inside the MV Station. When the device stops, the
heating components may still be hot. Wear proper glove when working on them.
•Wear proper PPE, such safety glasses, safety footwear and safety gloves if
necessary.
•Necessary auxiliary measures are recommended to ensure personal and device
safety.
System Manual 2 Safety Instructions

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2.2.15 Disposal of Waste
When the MV Station or internal devices is end of life, it cannot be disposed of together
with household wastes. Some components inside can be recycling and some
components can cause environment pollution.
Contact the local authorized collection point.
2.2.16 Manual Description
For user’s convenience, there are a large number of pictures in this manual.
These pictures 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, maintenance and troubleshooting of the device.
All the descriptions in this manual are based on the standard MV Station, and
the actual product you receive may differ. If necessary, specify your
requirements when placing the order.
This manual may not cover all possible situations. Should a specific problem occur that
is not explained in this manual, contact Sungrow.
2 Safety Instructions System Manual

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3Product Description
3.1 Brief Introduction
The MV Station mainly applies to medium and large-scale PV generation systems.
Based on standard-sized outdoor container, the MV Station integrates inverter,
transformer, switchgear, power distribution unit, monitoring unit to meet with the
requirements of modular design and fast installation of the PV systems.The MV Station
converts 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 of the MV Station are as follows:
CCoonnttrrooll aanndd MMoonniittoorriinngg WWiinnddooww
The Control and Monitoring window is located on the front door of the inverter.
As shown in the figure below, the LED indicators are at the upper part, the color liquid
crystal (LCD) touchscreen is at the middle part, and the emergency stop button is at the
lower part.

12
ffiigguurree 33--11 Control and Monitoring window
The LEDs at the upper side of the Control and Monitoring Window: POWER indicates
power-on state; OPERATION indicates normal operation; and FAULT indicates the
occurrence of faults.
The working status of the MV Station can be acquired through these LEDs.
LLEEDD CCoolloorr DDeessccrriippttiioonn
POWER Green The control circuit power supply is supplying power.
OPERATIO-
N
White MV Station is in stop mode.
Green MV Station is in grid-connected run mode.
Yellow MV Station 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.
TThhee EEMMEERRGGEENNCCYY SSTTOOPP BBuuttttoonn
When an emergency occurs, press the emergency stop button to disconnect the DC
and AC circuit breakers immediately.
TThhee MMAAIINNTTEENNAANNCCEE IINNTTEERRFFAACCEE
The cover plate of the LCD can only be opened with the key. Remove the key and store
it properly after use.
The cover plate of the LCD can only be opened with the key. Remove the key
and store it properly after use.
3.2.2 Mechanical Parameter
DDiimmeennssiioonnss
External dimensions are shown in figure below.
3 Product Description System Manual