Sungrow SG2500U-MV User guide

SG2500U-MV-V11-SEN-Ver10-201805
SG2500U-MV
MV Turnkey Station
System Manual

I
Contents
1About This Manual....................................................................1
1.1 Preface........................................................................................................1
1.2 Validity .........................................................................................................1
1.3 Content........................................................................................................1
1.4 Target Group................................................................................................1
1.5 Symbols Explanation...................................................................................2
1.6 How to Use this Manual ..............................................................................3
1.7 Terminology.................................................................................................3
2Safety Instructions ...................................................................4
2.1 Intended Usage...........................................................................................4
2.2 Important Safety Instructions.......................................................................4
2.2.1 General Safety Rules..........................................................................5
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 ESD Protection....................................................................................7
2.2.9 LCD Parameter Setting.......................................................................7
2.2.10 Sand and Moisture Protection...........................................................7
2.2.11 Symbols on the Device Body............................................................7
2.2.12 Safety Warning Signs........................................................................7
2.2.13 Daily Operation and Maintenance.....................................................7
2.2.14 Disposal of Waste.............................................................................8
2.2.15 Manual Description ...........................................................................8
2.3 Safety Instructions of Each Working Area...................................................8
2.3.1 Safe Operation of the MV Station room ..............................................9
2.3.2 Safe Operation of the Transformer Room...........................................9
3Product Description ...............................................................10
3.1 Brief Introduction .......................................................................................10
3.2 MV Station Internal Construction...............................................................10

II
3.3 Overall Design of the MV Station ..............................................................11
3.3.1 MV Station Views ..............................................................................11
3.3.2 Mechanical Parameter..................................................................... 13
3.3.3 Ventilation Design ............................................................................ 14
3.4 Interior Design of the MV Station.............................................................. 14
3.4.1 Internal Components........................................................................ 14
3.4.2 Cable Entry Design .......................................................................... 15
3.4.3 Internal Devices of the MV Station................................................... 16
3.4.4 Operations on the DC circuit breakers............................................. 17
4Identify and Store the MV Station......................................... 18
4.1 Identifying the MV Station......................................................................... 18
4.2 Checking for Transport Damages............................................................. 18
4.3 Storage of the MV Station......................................................................... 18
5Mechanical Installation.......................................................... 20
5.1 Transport .................................................................................................. 20
5.2 Hoisting the MV Station............................................................................ 21
5.2.1 Safety Precautions........................................................................... 21
5.2.2 Hoisting ............................................................................................ 22
5.2.3 Fastening of Connectors.................................................................. 23
5.3 Foundation................................................................................................ 23
5.3.1 Selection of Installation Site............................................................. 23
5.3.2 Foundation Requirements................................................................ 23
5.3.3 Recommended foundation construction plan................................... 24
5.3.4 Other Precautions ............................................................................ 26
5.4 Removing Flashings and Cover Plates................................................ 27
6Electrical Installation............................................................. 28
6.1 Safety Instructions.................................................................................... 28
6.1.1 Generals rules.................................................................................. 28
6.1.2 Five Safety Rules............................................................................. 29
6.2 Parts for Cabling....................................................................................... 30
6.2.1 Copper Wire Connection.................................................................. 30
6.2.2 Aluminum Wire Connection.............................................................. 31
6.3 Tightening Torques................................................................................... 31
6.4 Preparation before Electrical Connections............................................... 31
6.4.1 Installation Tools............................................................................... 32
6.4.2 Opening the MV Station door........................................................... 32
6.4.3 Removal of the Protective Grid........................................................ 32

III
6.4.4 Removing Sealing Tapes of Cable Inlet holes ..................................32
6.4.5 Checking the Cables.........................................................................32
6.4.6 During Connection ............................................................................33
6.5 MV Station Circuit Diagram and Cable Connection ..................................33
6.5.1 Circuit Diagram .................................................................................33
6.5.2 Cable Specifications..........................................................................33
6.6 General principles for cable connections ..................................................34
6.7 DC Connection..........................................................................................34
6.7.1 Checking before Connection.............................................................34
6.7.2 DC Cable Connection .......................................................................34
6.8 AC Connection ..........................................................................................36
6.8.1 Safety Notices...................................................................................36
6.8.2 AC Cable Connection........................................................................37
6.9 Ground Connection ...................................................................................37
6.9.1 Brief Introduction...............................................................................37
6.9.2 Equipotential Connection of MV Station Internal Devices.................37
6.9.3 External grounding............................................................................38
6.10 Communication Connection ............................................................39
6.11 External Power Supply Connection.............................................40
6.12 Finishing Electrical Connection .......................................................41
7Commissioning.......................................................................42
7.1 Safety Instructions.....................................................................................42
7.2 Requirements for Commissioning.............................................................42
7.3 Checking before Commissioning ..............................................................43
7.3.1 Checking the Cable Connection .......................................................43
7.3.2 Checking the module ........................................................................43
7.3.3 Checking PV Array............................................................................43
7.3.4 Checking Grid Voltage ......................................................................44
7.4 Preparation before Starting .......................................................................44
7.5 Starting the Device ....................................................................................44
7.6 LCD Parameter Setting.............................................................................45
7.7 Completing Commissioning.......................................................................45
8Starting/Stopping....................................................................47
8.1 Starting ......................................................................................................47
8.1.1 Inspection before starting..................................................................47
8.1.2 Starting Steps....................................................................................47
8.2 Stopping.....................................................................................................48

IV
8.2.1 Normal Stop ..................................................................................... 48
8.2.2 MV Station Stops when A Fault Occurs............................................ 48
9LCD Menu Operation............................................................. 49
9.1 LCD Touch Screen ................................................................................... 49
9.2 Default Screen.......................................................................................... 49
9.2.1 Initialization....................................................................................... 49
9.2.2 Default Screen Introduction.............................................................. 49
9.2.3 Backlight and Screensaver .............................................................. 50
9.3 Overview of LCD Menu and Icon ............................................................. 50
9.3.1 Overview of Submenu and Icon....................................................... 50
9.3.2 Layout of the submenus................................................................... 50
9.4 Entering Password ................................................................................... 51
9.5 Language Setting ..................................................................................... 52
9.5.1 Conventional Way............................................................................ 52
9.5.2 Shortcut............................................................................................ 52
9.6 Date and Time Setting.............................................................................. 53
9.7 Running Information Checking................................................................. 53
9.8 History Information Checking ................................................................... 54
9.8.1 History Event Checking.................................................................... 54
9.8.2 History Data Checking ..................................................................... 55
9.8.3 History Fault Checking..................................................................... 55
9.8.4 HistoryAlarm Checking.................................................................... 56
9.9 Present Fault Information Checking......................................................... 56
9.10 Starting/Stopping............................................................................. 57
9.11 Load Default ................................................................................... 57
9.12 Firmware Version Checking............................................................ 57
9.13 Parameters of LCD......................................................................... 58
9.13.1 Communication Parameters........................................................... 58
9.13.2 Running Parameters ...................................................................... 59
9.13.3 Protection Parameter ..................................................................... 61
10 MV Station Functions ............................................................ 66
10.1 Operation Mode.............................................................................. 66
10.1.1 Mode Change................................................................................. 66
10.1.2 Operation Mode Description .......................................................... 66
10.2 Complete Control Strategy ............................................................. 68
10.3 Active Power Limitation .................................................................. 68
10.3.1 Introduction to Active Power Limitation.......................................... 68

V
10.3.2 How to Realize Power Limitation....................................................68
10.4 Reactive Power Adjustment.............................................................69
10.5 L/HVRT............................................................................................70
10.6 Temperature Derating......................................................................71
10.7 MPPT...............................................................................................71
10.8 Intelligent Temperature-Control Technology....................................72
10.9Insulation Monitoring Function.........................................................72
10.9.1 Introduction .....................................................................................72
10.9.2 Simple Troubleshooting ..................................................................72
10.10 GFDI Function .................................................................................73
10.11 Vs-U Curve......................................................................................73
10.12 Protection Function..........................................................................73
10.12.1 DC over-voltage protection ...........................................................73
10.12.2 AC over/under-voltage protection .................................................73
10.12.3 Frequency anomaly protection......................................................73
10.12.4 Islanding protection.......................................................................73
10.12.5 Reverse polarity protection ...........................................................74
10.12.6 Overload protection.......................................................................74
10.12.7 Ground protection .........................................................................74
10.12.8 Module over-temperature protection.............................................74
10.12.9 Internal over-temperature protection.............................................74
10.13 Firefighting.......................................................................................74
10.13.1 General Introduction .....................................................................74
10.13.2 Smoke Detector ............................................................................74
11 Troubleshooting......................................................................76
11.1 Safety Instructions...........................................................................76
11.2 Fault Checking.................................................................................76
11.3 Fault and Troubleshooting on the LCD screen................................77
11.4 LCD DisplayAlarm Information and Troubleshooting .....................81
11.5 Other Faults.....................................................................................83
12 Routine Maintenance..............................................................84
12.1 Safety Instructions...........................................................................84
12.1.1 Safety Instructions...........................................................................84
12.1.2 Five Safety Rules............................................................................85
12.2 Maintenance....................................................................................85
12.2.1 Introduction .....................................................................................85
12.2.2 Maintenance Interval.......................................................................85

VI
12.2.3 Filter checking and cleaning........................................................... 87
12.2.4 Cleaning MV Station Air Inlet Window............................................ 88
12.2.5 Replacement of the electrical components.................................... 89
12.3 On-site painting make-up measures............................................... 89
12.4 Replacement of the electrical components..................................... 93
13 Appendix ................................................................................ 94
13.1 MV Station System Parameter........................................................ 94
13.1.1 Input data (DC side)....................................................................... 94
13.1.2 Output data (Grid side)................................................................... 94
13.1.3 Mechanical parameters.................................................................. 94
13.1.4 System data ................................................................................... 94
13.2 Exclusion of Liability ....................................................................... 95
13.3 Contact Information ........................................................................ 95

1
1 About This Manual
1.1 Preface
Thank you for purchasing the MV Turnkey Station from Sungrow Power Supply Co., Ltd.
We hope that the device will meet your satisfaction. Your commands and feedbacks on the
performance and function of the device are very important for our further improvement.
1.2 Validity
This manual is applicable to the MV Turnkey Station product of SG2500U-MV (hereinafter it
will be referred to as "MV Station" unless otherwise specified).
1.3 Content
This manual contains the following information:
Content
Description
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
Troubleshooting
Simple troubleshooting of the MV Station
Daily operation
Instructions and guide of the daily operation of the MV Station
1.4 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
should not perform any operation to 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 upstream and
downstream equipment
Trained specifically for electrical device installation and commissioning

1 About This Manual System Manual
2
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
1.5 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.
NOTE indicates additional information, emphasized contents or tips to help
you solve problems or save time.
The symbols below may be pasted on the electrical parts of the MV Station or its inside
device. Make sure to read the following symbols and fully understand them before installing
the equipment.
Symbol
Explanation
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.