Sungrow SC1200UD-US User manual

SSCC11220000UUDD--UUSS//SSCC11337755UUDD--UUSS//
SSCC11557755UUDD--UUSS//SSCC11772255UUDD--
UUSSPPoowweerr CCoonnvveerrssiioonn SSyysstteemm
((PPCCSS))OOppeerraattiioonn MMaannuuaall SSCC11220000__
11337755__11557755__11772255UUDD--UUSS--OOEENN--
VVeerr1133--220022110044
SC1200_1375_1575_1725UD-US-OEN-Ver13-202104
SC1200UD-US/SC1375UD-US/
SC1575UD-US/SC1725UD-US
PPoowweerr CCoonnvveerrssiioonn SSyysstteemm ((PPCCSS))
OOppeerraattiioonn MMaannuuaall

I
CCoonntteennttss
1 About This Manual ....................................................................................... 1
1.1 Validity ......................................................................................................... 1
1.2 Brief Introduction.......................................................................................... 1
1.3 Target Group................................................................................................ 2
1.4 How to Use This Manual............................................................................... 2
1.5 Symbols Explanation.................................................................................... 2
2 Safety Instructions ...................................................................................... 4
2.1 Intended Usage............................................................................................ 4
2.2 Important Safety Instructions........................................................................ 5
2.2.1 Manuals ............................................................................................. 6
2.2.2 Personnel ........................................................................................... 6
2.2.3 Markings on the PCS .......................................................................... 6
2.2.4 Safety Warning Signs ......................................................................... 7
2.2.5 Emergency Escape Route .................................................................. 7
2.2.6 Storage Battery Protection .................................................................. 7
2.2.7 Live Line Measurement....................................................................... 8
2.2.8 Measuring Instrument......................................................................... 8
2.2.9 ESD Protection ................................................................................... 8
2.2.10 Moisture protection........................................................................... 8
2.2.11 Maintenance and Service ................................................................. 9
2.2.12 Disposal of Waste............................................................................. 9
2.2.13 Others .............................................................................................. 9
3 Product Description .................................................................................. 10
3.1 Appearance............................................................................................... 10
3.2 Communication Solution ............................................................................ 12
3.2.1 RS485 Communication..................................................................... 12
3.2.2 Ethernet Communication .................................................................. 13
3.2.3 Communication with BMS................................................................. 14
3.3 Circuit Diagram .......................................................................................... 14
4 PCS Start/Stop ........................................................................................... 15
4.1 Operations on DC Load Switch ................................................................... 15

II
4.2 Starting the PCS......................................................................................... 16
4.2.1 Inspection before PCS Start .............................................................. 16
4.2.2 Starting the Device ........................................................................... 17
4.3 Stopping the PCS....................................................................................... 17
4.3.1 Normal Stop ..................................................................................... 18
4.3.2 Stop in Case of Fault or Emergency .................................................. 18
5 Operating Mode ......................................................................................... 19
5.1 Basic Functions.......................................................................................... 19
5.2 Working State Description.......................................................................... 20
5.3 State Switching .......................................................................................... 21
5.4 Working Mode ........................................................................................... 21
5.4.1 On-Grid Mode .................................................................................. 21
5.4.2 VSG Mode........................................................................................ 22
5.4.3 Mode Switching................................................................................ 23
6 Web Operation ........................................................................................... 24
6.1 Running Environment Requirements........................................................... 24
6.2 Login Steps................................................................................................ 24
6.3 Web Main Interface.................................................................................... 24
6.4 Web Menu................................................................................................. 25
6.5 Operation Procedure.................................................................................. 26
6.6 Overview.................................................................................................... 27
6.6.1 General Information.......................................................................... 27
6.6.2 Real-time status................................................................................ 28
6.7 Device Monitoring ...................................................................................... 28
6.7.1 Realtime Value.................................................................................. 28
6.7.2 Node Status ..................................................................................... 28
6.7.3 Operation Parameters....................................................................... 28
6.7.4 Protection Parameters ...................................................................... 32
6.7.5 System Parameters .......................................................................... 36
6.7.6 Timed Charge and Discharge............................................................ 37
6.7.7 Device Instruction............................................................................. 38
6.8 Device ....................................................................................................... 38
6.8.1 Device List........................................................................................ 38
6.8.2 Firmware Update.............................................................................. 39
6.8.3 Fault Recorder.................................................................................. 39
6.9 History Data ............................................................................................... 40

III
6.9.1 Operation Log................................................................................... 40
6.9.2 Historical status ................................................................................ 40
6.9.3 Parameter Log.................................................................................. 40
6.9.4 Measuring Point Log......................................................................... 40
6.10 System .................................................................................................... 41
6.10.1 System Maintenance...................................................................... 41
6.10.2 System Time................................................................................... 41
6.10.3 Transfer Configuration .................................................................... 42
6.10.4 Template Management................................................................... 43
6.10.5 Port Parameter ............................................................................... 43
6.11 About....................................................................................................... 44
7 PCS Functions ............................................................................................ 45
7.1 L/HVRT(UL)................................................................................................ 45
7.2 Temperature Derating ................................................................................ 46
7.2.1 Discharge Temperature Derating ...................................................... 46
7.2.2 Charge Temperature Derating........................................................... 46
7.3 Altitude Derating......................................................................................... 47
7.3.1 Discharge Altitude Derating .............................................................. 47
7.3.2 Charge Altitude Derating................................................................... 47
7.4 Protection Functions .................................................................................. 48
8 Routine Maintenance ............................................................................... 51
8.1 Safety Instructions ..................................................................................... 51
8.1.1 Safety Rules ..................................................................................... 51
8.1.2 Five Safety Rules.............................................................................. 51
8.2 Maintenance and Interval........................................................................... 52
8.3 Filter Checking and Cleaning ..................................................................... 54
8.4 Replacing Electrical Components ............................................................... 55
9 Troubleshooting ......................................................................................... 56
9.1 Fault Checking........................................................................................... 56
9.2 Other Faults ............................................................................................... 56
10 Appendix .................................................................................................... 58
10.1 Technical Data ......................................................................................... 58
10.2 Exclusion of Liability ................................................................................. 60
10.3 Contact Information ................................................................................. 61

1
1 About This Manual
1.1 Validity
This Installation Manual is valid for the following device types:
•SC1200UD-US
•SC1375UD-US
•SC1575UD-US
•SC1725UD-US
The SC1200UD-US/SC1375UD-US/SC1575UD-US/SC1725UD-US device is referred
to as “PCS” hereinafter unless otherwise specified.
1.2 Brief Introduction
This manual mainly contains the following content.
•Safety Instructions
Safety instructions for installation of the PCS.
•Product Description
System composition, PCS function and operation mode is described.
•Use
Introduce the PCS operation and use of Web.
•Routine Maintenance
Introduce the daily maintenance of the PCS and the replacement of certain
accessories.
•Troubleshooting
Introduce the potential faults and troubleshooting of the PCS.
•Others
Technical data of the PCS, exclusion of liability and the way to contact Sungrow.

2
1.3 Target Group
This manual is aimed at technical personnel who are responsible and qualified for the
PCS installation and commissioning. Readers should be familiar with the electrical and
mechanical diagrams and characteristics of the electrical components.
1.4 How to Use This Manual
Read this manual and other related documents carefully before any work on the PCS.
Documents must be stored carefully and available at all times. Additional documents
are also available to the users:
•Installation Manual (in the scope of delivery)
•Connection Requirements for Medium-voltage Transformers
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.
1.5 Symbols Explanation
This manual contains important safety and operational instructions that must be
accurately understood and followed during the installation and maintenance of the
equipment.
To ensure optimum use of this manual, note the following explanations of 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 Operation Manual

3
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 PCS. Make sure to read
the following symbols and fully understand them before installing the equipment.
SSyymmbboollss EExxppllaannaattiioonnss
Risk of electric shock!
Hot surface! Do not touch the hot surface of the device.
Do not touch live parts until 5 minutes after disconnection from the
power sources.
Protective earth. Earthing securely to ensure personal safety.
Operation Manual 1 About This Manual

4
2Safety Instructions
2.1 Intended Usage
This series of Power Conversion System researched and developed by Sungrow Power
Supply Co., Ltd., is a PCS for energy storage system without transformer. It provides an
interface for the grid and battery for storage system charging and discharging. Through
step up by the external transformer, the PCS AC side can connect to the grid or load.
With TYPE 3R protection rate, the PCS can be installed outdoors.
Through the external medium-voltage transformer, the AC output voltage of PCS will be
raised to conform to parameters of local utility grid. Then the PCS can be connected to
the grid. For specific technical requirements of transformer, please refer to the "-
Connection Requirements of Medium-Voltage Transformer".
The charging and discharging system with Power Conversion System is shown below:
FFiigguurree 22--11 Energy storage system
NNoo.. NNaammee
A Energy storage batteries (lead-acid battery, lithium battery and etc.)
BPower Conversion System
C Medium-voltage transformer
D Utility grid
E Loads

5
•Installation described in this section must be strictly observed. Any other or
additional installation other than the described installation is not permitted.
•Installation and connections other than the contents described in this section
may lead to device damages and void warranty claims from Sungrow.
2.2 Important Safety Instructions
This section introduces the safety instructions during installing or commissioning of the
PCS. Read the safety instructions in this section before installation. Please also respect
all warnings, instructions, and cautions in respective chapters before installation and
commissioning.
Shock Hazard!
Death resulting from burns and electric shock upon touching the PCS live
components.
•Do not touch the terminals or conductors connected to the grid.
•Observe all safety regulations regarding the grid connection.
Shock hazard inside the product!
•Note and respect the warning labels in the product.
•Respect all safety instructions in this manual and other related documents.
Electric shock or fire due to device damage or system fault!
•Visual check if there is device damage or other potential dangers before
operation.
•Check if other external devices or circuit connections are safe.
•Operate the device only when it is safe to do so.
Operation Manual 2 Safety Instructions

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The equipment shall be dried after passing through condensing environment,
and it is recommended to dry it under ventilation for at least 24 hours.
Before running the equipment, insulation resistance test shall be performed,
and then withstand voltage test after the insulation resistance test is passed:
•When all the tests pass, the running operation can be continued.
•If the insulation and withstand voltage test fail, it is required to continue to
dry until the requirements are met.
Generally, the equipment can run normally after 2 rounds of drying.
After completing maintenance and troubleshooting, power on the device in
strict accordance with the instructions in this manual.
2.2.1 Manuals
Very important information about transportation and installation of the PCS are included
in this manual. All the descriptions in this manual, especially those safety-related items,
must be complied with.
•Please read all the instructions thoroughly prior to any transportation or installation
work on the PCS. Device damage, personal injury and property loss may follow if
otherwise.
•This manual and relevant documents should be available for relevant persons at all
times.
2.2.2 Personnel
•Only professional electrician or personnel with professional training can transport or
install the PCS;
•Operator should be familiar with the construction and working principle of the whole
energy storage system;
•Operator should be familiar with the PCS Operation Manual and Installation Manual;
•Operator should be familiar with the country/local specific standards.
2.2.3 Markings on the PCS
•PCS enclosure and interior warning labels contain important warning and safety
information. Do not tear or damage it.
•Nameplates located in the back panel and inside the front door contain very
important PCS parameter information. Do not tear or damage them.
2 Safety Instructions Operation Manual

7
•All safety instructions, warning labels and nameplate on the PCS body must
be clearly visible;
•Replace the markings once they damaged or unclear.
2.2.4 Safety Warning Signs
Please respect the followings during installation, daily maintenance or troubleshooting
of the PCS:
•An obvious marking should be placed in the PCS switches upstream and
downstream to keep the switch from accidental reconnection;
•A temporary warning sign or barrier must be posted around the installation area;
•Remove the door keys and keep them appropriately after the installation work.
2.2.5 Emergency Escape Route
The emergency escape route is critical during an emergency situation.
•Keep the escape route clear and unblocked at all times.
•Never block or lock the emergency escape route.
2.2.6 Storage Battery Protection
High Voltages exist between the positive and negative polarities of the storage batteries
for large-scale PV plant. Electrical shock or life risk may occur by accidental touch.
High voltages exist between the positive and negative polarities of the storage
batteries!
•Ensure the PCS and storage batteries are disconnected completely during
device maintenance.
•Place warning labels in the disconnection place to avoid accidental
reconnection.
If the battery needs to be reconnected after the switch or circuit on battery
output side is disconnected, ensure that:
•The DC switch is disconnected, and the PCS has been stopped for at least 5
minutes.
•Voltages inside the device fall within safe range.
Operation Manual 2 Safety Instructions

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2.2.7 Live Line Measurement
High voltages are present in the device. Death resulting from burning and
electric shock upon touching the live components of the PCS. During live line
measurement,
•use suitable protective equipment , for example dielectric gloves, and
•accompany by other persons.
2.2.8 Measuring Instrument
To ensure each electrical parameter meets requirement during electrical connection
and commissioning, please use related electrical measurement instruments.
•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
•Personal Protective Equipment (for example, insulation gloves and etc.) must
be equipped for live line measurement.
2.2.9 ESD Protection
The PCS may be damaged irreversibly by electrostatic discharge (ESD) at its
components.
•During the operation of the PCS, please observe all the ESD-related safety
regulations, for example wear antistatic wrist strap.
•Avoid unnecessary touch of the printed circuit board or other sensitive
components.
2.2.10 Moisture protection
Moisture can damage the PCS. For normal operation of the PCS, please respect
the followings:
•Do not open the PCS doors when relative humidity is higher than 95%.
•Do not maintain or service the PCS in rainy or other bad days.
2 Safety Instructions Operation Manual

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2.2.11 Maintenance and Service
Wait at least 5 minutes after the PCS AC and DC connections are disconnected
and then open the PCS front door to maintain or service.
Before any service work, observe the followings.
•Ensure that the PCS will not be started accidentally.
•Verify that the PCS interior is discharged completely with a multimeter.
•Necessary ground and short circuit connect.
•Cover the adjacent electrical components with insulation cloth during operation.
•Ensure the clearness of the safety route during maintenance and service work.
2.2.12 Disposal of Waste
When the PCS is end of life, it cannot be disposed of together with household wastes.
Please contact the local authorized collection point.
2.2.13 Others
Please observe country/local-specific standards and regulations.
•Only service the device when it is voltage-free.
•Never work alone when servicing this device. Two persons are required until
the PCS is properly shut down and de-energized.
Other protection measures:
•Use suitable protective equipment (for example safety goggles, earplugs, dielectric
gloves, insulating shoes) when maintaining or servicing the device.
•Emergency aid should be prepared beforehand since the PCS is always installed far
away from the downtown area.
•Every possible auxiliary method should be taken to ensure the safety of personnel
and device.
•All the pictures and descriptions in this manual apply to the standard
configuration PCS. The actual product you receive may differ. Should you
have any specific requirements, please inform us.
•This manual may not cover all possible situations. Should a specific
problem occur that is not explained in this manual, please contact Sungrow.
Operation Manual 2 Safety Instructions

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3Product Description
3.1 Appearance
The external appearance and major components are shown in the following figure.
FFiigguurree 33--11 Appearance of the PCS
IItteemm NNaammee DDeessccrriippttiioonn
AEmergency stop button Disconnect the PCS from DC side power
supply when pressing this button
B Door lock Used to lock and open the PCS front door
C LED indicator “POWER”, “OPERATION” and
“FAULT”
DStart/Stop button Start: Have the boot conditions
Stop: Close the PCS
E Maintenance interface Used as the external maintenance network
port of the device.

11
The AC switch is located inside the PCS and only used to start/stop the PCS.
SUNGROW shall hold no liability for damage caused by inappropriate
operations.
LLEEDD iinnddiiccaattoorrss
There are three LEDs at the front panel of the PCS: POWER indicates the power is on;
OPERATION indicates the operation of the PCS; FAULT indicates a fault condition.
Obtain the PCS operation state through these LEDs and control the PCS by the Web.
See the following table for the description of the LED indicators.
LLEEDD CCoolloorr DDeessccrriippttiioonn
POWER Green
Control circuit power supply The indicator turns on 5
minutes after the DC side is supplied with power; or it
immediately turns on when AC side or both AC and DC
sides are supplied with power.
OPERA-
TION
Green PCS operates normally
Yellow PCS operates alarm
White PCS is in stop/standby state
FAULT Red A fault occurs and has not been removed.
The LED will be off automatically when the fault is cleared.
Possible LED combinations and the meaning are listed in the following table:
LLEEDD
ssttaattuuss DDeessccrriippttiioonn
“POWER” LED is on PCS normal power supply, no charging or
discharging
“POWER” is on
“OPERATION” is on
AC and DC side parameters meet the
requirements. PCS operates normally
“POWER” is on
“OPERATION” is
yellow
PCS operates alarm
“POWER” is on
“FAULT” is on
A fault occurs and not removed yet.
All LEDs are off PCS is disconnected from the power supply,
no power supply
Operation Manual 3 Product Description

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EEmmeerrggeennccyy SSttoopp BBuuttttoonn
PCS will be disconnected the AC and DC side when pressing down the emergency stop
button in emergency situation or fault condition.
Electrical shock hazards!
•The pressing of the emergency stop button in no way implies that no voltage
is present in the AC and DC connection terminals inside the PCS.
•Lethal voltages are present inside the PCS!
Use the emergency stop button to stop the PCS only in a time of emergency.
Improper use of the emergency stop button may lead to PCS damages. Use of
the emergency stop button under load will bring great stress to PCS related
components. Frequent use will damage the button.
When you push this button, the PCS will stop immediately and the DC & AC contactors
will be disconnected.
You can restart the PCS by rotating the button clockwise to unlock it. The PCS will be
restarted through the LCD touch screen.
SSttaarrtt//SSttoopp BBuuttttoonn
The start/stop button is used to start/stop the PCS. Only when the button is rotated to
the "START" position, can users issue valid instruction through the WEB monitoring
interface or the background monitoring system. Otherwise, the PCS will keep in key stop
state.
If the button is in the "STOP" position, a stop instruction will be delivered to the DSP
controller, so that the PCS turns into key stop state.
3.2 Communication Solution
3.2.1 RS485 Communication
PCSs communicate with the PC through RS485/RS232 convertor. SolarInfo SC can be
adopted to monitor the communication.
3 Product Description Operation Manual

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FFiigguurree 33--22 PC monitors through RS485
3.2.2 Ethernet Communication
Besides the standard RS485 communication, PCS also provides the optional Ethernet
communication. PCS supports the MODBUS TCP/RTU and 104 protocols. If you have
doubts about the communication solution, please contact Sungrow.
SSiinnggllee PPCCSS ccoommmmuunniiccaattiioonn
For communication of a single PCS, connect the PCS RJ45 port to PC RJ45 port by a
network cable. SolarInfo SC can be used to monitor the communication.
FFiigguurree 33--33 Ethernet communication for a single PCS
MMuullttiippllee PPCCSSss ccoommmmuunniiccaattiioonn
If there is more than one PCS, the Ethernet switch is required for communication.
SolarInfo SC is used to monitor the communication.
FFiigguurree 33--44 Ethernet communication for multiple PCSs
For more information on the SolarInfo, contact SUGROW technical supports,
or download the corresponding document form SUNGROW website.
Operation Manual 3 Product Description

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3.2.3 Communication with BMS
PCS can communicate with battery management system (BMS) to monitor the state of
the battery and protect the battery according to the battery state. Communication
supports the CAN and RS485 methods.
FFiigguurree 33--55 PCS communicates with BMS
3.3 Circuit Diagram
PCS realizes rectification and inversion through 3-phase full bridge conversion. The
rectified output feeds to the storage batteries through EMC filter. The inverted output
turns to sine-wave voltage through LC filter and then feeds to the grid after step-up by
3-phase transformer. The circuit diagram is shown in "Figure 3-6 PCS circuit diagram".
FFiigguurree 33--66 PCS circuit diagram
3 Product Description Operation Manual