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Sungrow SG3000HV-MV-30 User Manual
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Sungrow SG3000HV-MV-30 User Manual

Sungrow SG3000HV-MV-30 User Manual

Mv grid-connected pv inverter
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User Manual
MV Grid-connected PV Inverter
SG3000HV-MV-30/SG3125HV-MV-30/SG3400HV-MV-30
SG3000HV-MV-30/SG3125HV-MV-30/
MV Grid-connected PV
SG3400HV-MV-30
H-002032
SG3000_3125_3400HV-MV-30-UEN-Ver26-202412

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Summary of Contents for Sungrow SG3000HV-MV-30

  • Page 1 User Manual MV Grid-connected PV Inverter SG3000HV-MV-30/SG3125HV-MV-30/SG3400HV-MV-30 SG3000HV-MV-30/SG3125HV-MV-30/ MV Grid-connected PV SG3400HV-MV-30 InverterUser ManualSG3000_3125_ 3400HV-MV-30-UEN-Ver27-202412M- H-002032 SG3000_3125_3400HV-MV-30-UEN-Ver26-202412...

  • Page 3: Table Of Contents

    Contents 1 About This Manual ...................1 1.1 Validity ......................1 1.2 Content......................1 1.3 Target Group ....................2 1.4 Symbols Explanation ..................2 1.5 How to Use this Manual ..................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...
  • Page 4 3.3 Internal Design of the MV Gridconnected PV Inverter ........15 3.3.1 Internal Components ................15 3.3.2 Cable Entry Design ................15 3.3.3 Internal Devices of the Inverter Unit ............16 3.3.4 Operations on the DC and AC Side ............18 4 Delivery ......................20 4.1 Scope of Delivery ..................20 4.2 Identifying the MV Grid-connected PV Inverter..........21 4.3 Checking for Transport Damages..............21 4.4 Storage Requirements ..................22...
  • Page 5 6.4 Ground Connection ..................37 6.5 AC Connection .....................39 6.5.1 Safety Instructions ................39 6.5.2 AC Cable Connection ................39 6.6 DC Connection.....................41 6.6.1 Checking before Connection ..............41 6.6.2 Installing PC Board before Connection (Optional) ........41 6.6.3 DC Cable Connection................42 6.7 Communication Connection on the Inverter ............46 6.8 External Equipment Connection..............46 6.9 Finishing Electrical Connection ..............47 7 Commissioning...
  • Page 6 9.3.1 Overview of Submenu and Icon............57 9.3.2 Layout of the submenus...............58 9.4 Entering Password ..................58 9.5 Setting Language ..................60 9.5.1 Conventional Way ................60 9.5.2 Shortcut .....................60 9.6 Setting Date and Time ..................60 9.7 Energy Output Deviation Adjustment..............61 9.8 Checking Running Information ..............61 9.9 Checking History Information ................62 9.9.1 Checking History Event ...............62 9.9.2 Checking History Data ................62...
  • Page 7 10.9.2 Anti-PID Function Setting..............74 10.9.3 PID Repair..................74 10.10 Insulation Monitoring Function ..............75 10.10.1 Introduction..................75 10.10.2 Simple Troubleshooting ..............75 10.11 Emergency Stop Button functions...............75 10.12 Tripping Functions of the DC Main Switches ..........76 10.13 Protection Function ...................76 10.13.1 DC Over-voltage Protection..............76 10.13.2 AC Over/under-voltage Protection ............76 10.13.3 Frequency Anomaly Protection............76 10.13.4 Islanding Protection .................77...
  • Page 8 12.4.5.2 Bottom Air Outlet ..............102 12.4.6 Cleaning the Surface of the MV Gridconnected PV Inverter ....102 12.4.7 Checking the Lock and Hinge............102 12.4.8 Checking the Sealing Strip ............... 102 12.5 Painting Make-up Measures ..............102 12.6 Replacement of the Electrical Components..........106 12.6.1 Safety Instructions................

  • Page 9: About This Manual

    About This Manual Validity This manual is intended for the following product • SG3000HV-MV-30 • SG3125HV-MV-30 • SG3400HV-MV-30 Hereinafter it will be referred to as " MV Grid-connected PV Inverter"" unless otherwise specified. MV is short for “Medium Voltage”. PV is short for “Photovoltaic”.

  • Page 10: Target Group

    1 About This Manual User Manual Target Group This manual is for technical personnel who are responsible for the transport, installation and other operations of the MV Grid-connected PV Inverter. Only qualified personnel can perform the installation, maintenance and troubleshooting of the MV Gridconnected PV Inverter.

  • Page 11: How To Use This Manual

    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.

  • Page 12: Safety Instructions

    Safety Instructions Intended Usage The MV Grid-connected PV Inverter, designed and manufactured by SUNGROW, is mainly applied to medium and large-scale PV power plants. The MV Grid-connected PV Inverter can meet the requirements of modular design and quick installation for medium and largescale PV power plants, and can ensure long-term, reliable, and safe feed-in operation.

  • Page 13: Manual Storage

    User Manual 2 Safety Instructions 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.

  • Page 14: Ground Fault Protection

    2 Safety Instructions User Manual 2.2.4 Ground Fault Protection If a ground fault occurs in the MV Grid-connected PV Inverter, 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.

  • Page 15: Danger From Electric Arc

    To avoid personal injury or device damage, perform operations on the 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.

  • Page 16: Esd Protection

    2 Safety Instructions User Manual Electric Arc Risk on the MV Side • 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.

  • Page 17: Safety Warning Signs

    User Manual 2 Safety Instructions 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 Station, keep non- related persons away.

  • Page 18: Disposal Of Waste

    PV Inverter, 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.

  • Page 19: Product Description

    Product Description Brief Introduction The MV Grid-connected PV Inverter mainly applies to medium and large-scale PV power plants, which can be directly fed into the medium voltage grid. The MV Grid-connected PV Inverter integrates inverter units, transformer, power distribution cabinet and monitoring unit to ensure modular design and fast installation.
  • Page 20 3 Product Description User Manual Verson 2 Verson 3 Unless otherwise specified, the device referred to hereinafter is Version 1. Control and Monitoring Window The Control and Monitoring window is located on the back side of the inverter unit. As shown in the figure below, the LED indicators are at the upper part, the color liquid crystal (LCD) screen is at the middle part, and the emergency stop button is at the lower part.

  • Page 21: Mechanical Parameter

    User Manual 3 Product Description figure 3-1 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 Gridconnected PV Inverter can be acquired through these LEDs.

  • Page 22: Ventilation Design

    3 Product Description User Manual Width Height Depth 6,058 mm 2,896 mm 2,438 mm Clearance Spaces The clearances around the MV Grid-connected PV Inverter should be sufficient for the doors to be opened 3.2.3 Ventilation Design The ventilation system is designed as the cool air comes inside from the top of the inverter unit and hot air gets outside from the bottom of the inverter.

  • Page 23: Internal Design Of The Mv Gridconnected Pv Inverter

    User Manual 3 Product Description Internal Design of the MV Gridconnected PV Inverter 3.3.1 Internal Components Figure below shows the top view of the major electrical components inside the MV Gridconnected PV Inverter: Description Device Convert the DC current generated from the PV arrays into low- Inverter unit voltage AC current Convert the low-voltage AC current output by inverter units into...

  • Page 24: Internal Devices Of The Inverter Unit

    3 Product Description User Manual figure 3-2 Top view Function of each opening is shown below: Description Name DC cables connect to the inverter unit DC cable inlet through these holes. AC cables connect to the switchgear AC cable outlet through these holes.
  • Page 25 User Manual 3 Product Description figure 3-3 DC Cabinet Description Name Disconnect the switch before maintaining AC cabinet AC maintenance QS25 components. switch DC load switch Connect/disconnect the DC side of the inverter unit. Disconnect the switch before maintaining DC cabinet DC maintenance components.

  • Page 26: Operations On The Dc And Ac Side

    3 Product Description User Manual figure 3-4 AC Cabinet Description Remark Name AC circuit breaker Connect/disconnect the AC side of the inverter unit. *The figure above is indicative only. 3.3.4 Operations on the DC and AC Side DC load switches and AC circuit breakers are provided on inverter unit. Description Name When the DC load switch/AC circuit breaker...
  • Page 27 User Manual 3 Product Description Description Name The DC load switch/AC circuit breaker is Push ON button turned on when this button is pressed Display the present energy storage state, Energy storage state CHARGED SPRING or DISCHARGE indicator SPRING The DC load switches/AC circuit breakers can be used together with a motorized kit.

  • Page 28: Delivery

    Delivery Scope of Delivery Device Note MV Gridconnected PV Inverter User manual, delivery inspection report, Enclosed documents certification, and warranty card Door keys of MV Gridconnected PV Inverter Keys to monitor window Keys to the emergency stop button M16×55 Bolt M6×20 M5×16 Spring washer...

  • Page 29: Identifying The Mv Grid-Connected Pv Inverter

    Identify the MV Grid-connected PV Inverter via its nameplate. The nameplate contains the following information: MV Grid-connected PV Inverter, major technical parameters, marks of conformity, origins, and serial number which are available and recognized by SUNGROW. Very important technical parameters and MV Grid-connected PV Inverter related parameters are contained in the nameplate.

  • Page 30: Storage Requirements

    4 Delivery User Manual Storage Requirements 4.4.1 Storage Environment • The MV Grid-connected PV Inverter should be stored in an environment with a temperature ranging from -40° C to 70° C. f the ambient temperature is too low, take necessary heating measures for the inverter's internal devices. •...

  • Page 31: Routine Inspection For Long-Term Storage

    For a product shut down/stored for over six months, inspect its electrical components (- IGBT module, DC fuses, fans, etc.), and take dehumidifcation and dedusting mesaures for the whole product. For detailed operation, please contact SUNGROW. • The UPS and their batteries must be charged once every six months after leaving the...

  • Page 32: Mechanical Installation

    Mechanical Installation Respect all local standards and requirements during mechanical installation. Transport All devices are installed inside the MV Grid-connected PV Inverterbefore delivery. The MV Grid-connected PV Invertershould be transported as a whole. Transport the MV Grid- connected PV Inverterby crane with sufficient load capacity. The MV Grid-connected PV Inverteris delivered to the user by a forwarding company.

  • Page 33: Hoisting The Mv Gridconnected Pv Inverter

    User Manual 5 Mechanical Installation • Warning signs or barriers must be posted near the transport areas to avoid accidental injuries. Additionally, the following should be met when the MV Grid-connected PV Inverteris placed on the ground: • Place the MV Grid-connected PV Invertercarefully and gently. Do not pull or push the MV Grid-connected PV Inverteron any surface.

  • Page 34: Hoisting

    5 Mechanical Installation User Manual 5.2.2 Hoisting In the whole hoisting process, observe following rules: • Hoist the MV Grid-connected PV Inverter in a vertical manner. Do not drag or drop the MV Gridconnected PV Inverter on any surface. • When the MV Grid-connected PV Inverter has been hoisted for about 300mm from the ground, stop to check if all the connections are still firm.

  • Page 35: Fastening Of Connectors

    Insert the hook from inside Notice should be tightened. to outside. *The figure above is indicative only. • National and local safety rules should be observed at all times. • Regardless of relevant safety rules may void pertinent warranty claims from SUNGROW.

  • Page 36: Foundation

    5 Mechanical Installation User Manual Foundation 5.3.1 Selection of Installation Site When selecting the installation site, consider at least the following requirements: • Ambient and geological conditions, such as stress wave emissions, the level of underground water table, etc. should be taken into account. •...

  • Page 37: Recommended Foundation Construction Method

    User Manual 5 Mechanical Installation 5.3.3 Recommended Foundation Construction Method The overall diagram is shown in the following figure. Name Pea gravel ground Foundation Oil tray Constructing the Foundation It is recommended to construct the foundation as the following solution. Name Embedded channel steel Fixing the MV Gridconnected PV Inverter...

  • Page 38: Removing Sealing Tapes And Support Beams And Fixing Brackets

    5 Mechanical Installation User Manual The steps to fixing the L mounting parts is shown in the following figure. Removing Sealing Tapes and Support Beams and Fixing Brackets Support beams and fixing brackets are installed on the exterior of the MV Grid-connected PV Inverter to protect it against damage due to shaking or collision during transportation.
  • Page 39 User Manual 5 Mechanical Installation A total of four support beams (indicated as B) and two fixing brackets (indicated as C) are added to ensure stability during transportation. These beams and brackets will not affect the normal operation of the equipment and can be removed as needed. figure 5-1 Removing Sealing Tapes, Support Beams and Fixing Brackets *The figure above is indicative only.

  • Page 40: Electrical Installation

    Electrical Installation 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 Grid-connected PV Inverter.
  • Page 41 The installation and design of the MV Grid-connected PV Inverter must fulfill national and local standards and regulations. • SUNGROW shall not be held liable for the MV Grid-connected PV Inverter or system fault caused by ignorance of the description in this manual.

  • Page 42: Five Safety Rules

    6 Electrical Installation User Manual Select optical fibers as the external communication cable to lower the signal interference. 6.1.2 Five Safety Rules During electrical connections and other operations on the inside device, observe the following Five Safety Rules: • Disconnect all the external connections and disconnect the MV Grid-connected PV Inverter internal power supply.

  • Page 43: Checking The Cables

    User Manual 6 Electrical Installation 6.2.2 Checking the Cables Check to ensure the intactness and insulation of all cables before electrical connection. Poor insulation or damages in the cables may cause hazards. Replace them if necessary. 6.2.3 During Connection • Make sure the DC cables are correctly routed before connection.

  • Page 44: Circuit Diagram And Cable Connection

    6 Electrical Installation User Manual Circuit Diagram and Cable Connection 6.3.1 Circuit Diagram figure 6-1 Wiring scheme 1 figure 6-2 Wiring scheme 2 table 6-1 Ports in the figure above Name DC input AC output External communication port External 3-pahse power supply * is optional.

  • Page 45: Cable Specifications

    User Manual 6 Electrical Installation table 6-2 Devices in the figure above Name PV Inverter Transformer Switchgear Power distribution cabinet 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 influenced by environmental conditions, conductor insulation materials, laying, wire materials, cross-sectional areas, etc.
  • Page 46 6 Electrical Installation User Manual The connection of the internal main electrical devices to the ground copper bar has been finished before delivery. On site, if grounding connection is required, the 16mm cable is recommended. External Grounding For ease of onsite cable connection, two grounding points are designed at the exterior of the MV Grid-connected PV Inverter, as shown in the figure below.

  • Page 47: Ac Connection

    Any installations not following the standards or the installation and alternation without permission may lead to safety incidents or damage to the devices. SUNGROW shall not be held liable for the damages caused. AC Connection 6.5.1 Safety Instructions...
  • Page 48 6 Electrical Installation User Manual Wiring Area Wiring Steps Step 1 Lead the cable from external device through the cable entry on the bottom of the cable compartment. Step 2 Prepare the terminals and install them tightly, where reference can be made to the cable connector installation manual.

  • Page 49: Dc Connection

    User Manual 6 Electrical Installation Further Operations Seal the bottom cable entries with fire-proof mud, clear sundries inside the cabinet, and reassemble the sealing plate of the cabinet. Should there be any unused wiring terminals, block them with insulating caps. When connecting the AC cable, do not use the hole on the pressure relief plate as a substitute for the AC cable inlet.

  • Page 50: Dc Cable Connection

    6 Electrical Installation User Manual Step 3 Install the positive DC cable. - - End 6.6.3 DC Cable Connection DC Connection Area...
  • Page 51 User Manual 6 Electrical Installation figure 6-3 Negative grounding figure 6-4 Floating grounding figure 6-5 Floating grounding with energy storage system ports Remark Defination DC positive cable connection area DC negative cable connection area Energy storage system connection area Cable Requirements •...
  • Page 52 6 Electrical Installation User Manual Cable Connection Steps Proceed as follows to connect the DC cables: Step 1 Lead the cable into the wiring area through the inlet hole, and mark the cable polarity. Step 2 Strip the protective layer of the cable to expose the copper core of the wire with strippers. Step 3 Install the OT/DT terminal to the wire and crimp them with a crimping tool.
  • Page 53 User Manual 6 Electrical Installation Step 4 Connect the cable. Select bolts matching with the cable lug. Attach the cable lug to the DC connection copper bar. If copper wires are used, connect the spare parts as described below: When the aluminum wire is selected, a copper-aluminum adapter terminal is required, as shown below: Fasten the bolts with screwdriver or spanner.

  • Page 54: Communication Connection On The Inverter

    DC wiring copper bar, as this may damage the equipment. If you require an inverter unit that supports double-sided wiring, contact SUNGROW and provide information such as the sizes of cables and specifications of wiring terminals to be used. SUNGROW will evaluate the feasibility of customizing a product tailored to your needs.

  • Page 55: Finishing Electrical Connection

    User Manual 6 Electrical Installation *The figure above is indicative only,and the actual product shall prevail. Finishing Electrical Connection After the electrical connection, check the connections of all cables for correctness and firmness. After checking that all connections are correct and firm, •...

  • Page 56: Commissioning

    Commissioning Safety Instructions High voltage! Electric shock! • Wear proper PPE with an arc rating that meets the product requirements before all operations on the device. • Do not touch the live terminals or conductors. • Respect all safety instructions attached on the device and described in this manual.

  • Page 57: Requirements Of Commissioning

    User Manual 7 Commissioning Requirements of Commissioning Before commissioning, installation of all the devices inside the MV Grid-connected PV Inverter should be checked thoroughly. • Ensure all cables are connected securely and all bolts are fixed properly. • Ensure DC side voltage meets module requirements and the polarity is correct. •...

  • Page 58: Checking Pv Array

    7 Commissioning User Manual 7.3.3 Checking PV Array Ensure the measuring devices are connected and used correctly. Otherwise, there will be electric arc. DC side voltage should be no more than the max. DC input voltage of the MV Gridconnected PV Inverter. Too high DC voltage may damage the module even cause safety incident.

  • Page 59: Preparation Before Starting

    User Manual 7 Commissioning • Measure the THD and check the curve if possible. Module will stop running if the THD is serious. • Record accurately all the measured datas. Preparation before Starting • Place the disassembled protection grills to their original positions and ensure the connection is secure.
  • Page 60 7 Commissioning User Manual After successful commissioning, the MV Grid-connected PV Inverter will be put into operation. Local/national standards about the min. electric clearance around the MV Grid- connected PV Inverter should be respected. MV Grid-connected PV Inverter needs no manual control in daily operation. Open the cabinet door only for maintenance or troubleshooting and by qualified personnel only.

  • Page 61: Starting/Stopping

    Starting/Stopping Starting 8.1.1 Inspection before Starting After the maintenance or service work, inspect the following items, and then start the MV Gridconnected PV Inverter, • All connections are performed by strictly following the installation manual and circuit diagram. • The coverings of the internal devices are fixed and secured. •...

  • Page 62: Stopping

    8 Starting/Stopping User Manual Step 7 Perform the start operation through the LCD screen, and the MV Grid-connected PV Inverter starts grid-connected operation. After startup, the MV Grid-connected PV Inverter will automatically check if parameters of the DC and AC side meet the grid-connection requirements. If the requirements are met, and the set time has been reached, the MV Grid-connected PV Inverter will turn to the OPERATION mode and feed the generated AC current to the grid.

  • Page 63: Stop In Case Of Fault

    User Manual 8 Starting/Stopping Specific switch position，refer to"figure 3-3 DC Cabinet" and"figure 3-4 AC Cabinet" Never disconnect the AC or DC switch during normal operation. Otherwise, the MV Grid-connected PV Inverter as well as the switch may be damaged. 8.2.2 Stop in Case of Fault Proceed as follows to stop the MV Grid-connected PV Inverter when a fault or an emergency occurs: Step 1 Press the emergency stop button.

  • Page 64: Lcd Menu Operation

    LCD Menu Operation LCD Screen The eye-level LCD screen inside the monitoring window on the front side of the inverter unit is used to view data and set parameters. User can check or set related data by touching the icons on the LCD screen. For user convenience, a large number of pictures of the LCD interface are provided in this chapter.

  • Page 65: Backlight And Screensaver

    Inverter operation. All parameter configurations must be performed by appointed personnel. Do not modify any parameters without full understanding of the relevant action or without consulting SUNGROW Customer Support. 9.2.3 Backlight and Screensaver If no operation has been performed on the screen for more than 5 minutes, the backlight will go off.

  • Page 66: Layout Of The Submenus

    9 LCD Menu Operation User Manual Main Menu First sub-menu Second sub-menu Third sub-menu Language & Firmware Ver. Time Sys-parameter Remote/Local control E-adjust Load default Set-parameter Run-parameter — Pro-parameter — Address Serial port param. Com-parameter Network param. 9.3.2 Layout of the submenus The layout of submenus is the same as that shown below except for the default menu.
  • Page 67 User Manual 9 LCD Menu Operation Step 1 Tap “Function” from the default menu. Step 2 Tap “Set-parameter” and the password entering window pops up. Step 3 Tap the white edit box and a keypad pops up. Step 4 Enter the password 1111 through the keypad. If the entered password is correct, the parameter setting page pops up, and the user can set system parameters, running parameters, protection parameters, and communication parameters.

  • Page 68: Setting Language

    9 LCD Menu Operation User Manual Setting Language User can set the language by either of the following two ways: 9.5.1 Conventional Way Step 1 Tap “Function” from the default menu. Step 2 Tap “Set-parameter”. Step 3 Tap “Sys-parameter” after entering the correct password. Step 4 Tap “Language &...

  • Page 69: Energy Output Deviation Adjustment

    User Manual 9 LCD Menu Operation Energy Output Deviation Adjustment Energy output deviation adjustment is useful when the total power output displayed in LCD (E-total) is different from the reading value of the external power measuring device. (Energy-adj value)= (Real measured value)-(E-tot reading value). To adjust the date or time, proceed as follow: Step 1 Tap “Function”...

  • Page 70: Checking History Information

    9 LCD Menu Operation User Manual Step 4 Tap “E-histogram” and enter into the electricity histogram sub-menu. The value displayed is indicative only and cannot be used as a basis for billing. - - End Checking History Information There are four kinds of history information: history event, history fault, history data and history alarm.

  • Page 71: Checking History Alarm

    User Manual 9 LCD Menu Operation Step 3 Tap “His-fault” and enter into the history fault sub-menu. History faults can be viewed from this sub-menu, with up to 5 records can be shown in one page. The upper left side of the event table is the total number of the current fault records. Tap “Prev”...

  • Page 72: Starting/Stopping

    9 LCD Menu Operation User Manual If there is a fault, the “Work State” will show “Fault”. Tap the “Fault” cell. The state column of the module that has fault will display “Fault. As shown in the left figure, a fault occurs to inverter unit 2.

  • Page 73: Checking Firmware Version

    User Manual 9 LCD Menu Operation Step 4 Tap “Load default” and the password inputting window appears. Tap “Load default” and the password inputting window appears; - - End 9.13 Checking Firmware Version User can view the firmware version of LCD and DSP as follows: Step 1 Tap “Function”...

  • Page 74: Running Parameters

    9 LCD Menu Operation User Manual Step 3 Tap “Com-parameter” after entering the correct password. • Set parameter from the Address interface for address. • Set parameter from the Serial Port Parameter interface for baud. • Set parameter from the Network Parameter interface for IP address, subnet mask,etc. - - End 9.14.2 Running Parameters Setting Running Parameters...

  • Page 75: Main Functions

    10 Main Functions 10.1 Operation Mode 10.1.1 Mode Change After being energized, the MV Grid-connected PV Inverter switch among different modes as shown in the figure below. figure 10-1 Operation modes change is the DC input voltage of the module. Start is the module DC side startup voltage.
  • Page 76 10 Main Functions User Manual Startup This is the transient process between the Initial Standby mode and the Run mode. Once the Startup mode is complete, module will start powering the grid. In this mode, module converts the DC energy into AC energy and feeds it to the grid by way of MPPT.

  • Page 77: Complete Control Strategy(Optional)

    User Manual 10 Main Functions Alarm Run In Alarm Run mode, module can keep running but send alarm signal. User can check the present alarm information through the Working state on the LCD default screen or check the latest history alarm information through “Function”->”History information”->”his alarm”. Module automatically turns to Run mode when the alarm is removed.

  • Page 78: How To Realize Power Limitation

    Improper parameter configuration may affect the normal operation of the MV Gridconnected PV Inverter! Only authorized personnel can configure these parameters. Should any questions or doubt occur, contact SUNGROW. User can adjust the MV Grid-connected PV Inverter active power output through the LCD screen: Step 1 Tap “Function”...

  • Page 79: Low Voltage Ride Through (Lvrt)

    Improper parameter configuration may affect the normal operation of the MV Gridconnected PV Inverter! Only authorized personnel can configure these parameters. Should any question or doubt occurs, contact SUNGROW. 10.5 Low Voltage Ride Through (LVRT) Technical Requirements for Connecting Photovoltaic Power Station to Power System requires medium-and-large PV plant should be equipped with Low Voltage Ride Through (- LVRT) ability.

  • Page 80: High Voltage Ride Through (Hvrt)

    10-2 Lower voltage withstand requirements Note: T1, T2, U1, and U2 are all settable parameters. SUNGROW’s MV Grid-connected PV Inverter meets the abovementioned requirements. 10.6 High Voltage Ride Through (HVRT) Technical Requirements for Connecting Photovoltaic Power Station to Power System requires PV plant should be able to operate as required within certain voltage range.

  • Page 81: Mppt

    User Manual 10 Main Functions 10.7 MPPT Maximum Power Point Tracking (MPPT) is a technique that the MV Grid-connected PV Inverter uses to get the maximum power from the PV arrays. PV arrays have a complex relationship between solar irradiation, temperature and total resistance that produces a non- linear output efficiency known as the I-V curve.

  • Page 82: Anti-Pid Function Setting

    10.9.2 Anti-PID Function Setting For MV Grid-connected PV Inverter with optional anti-PID function, the enable and disable of this function can only be performed by personnel from SUNGROW. Contact SUNGROW if you need to switch this function. Proceed as follows to set the mode if the Anti-PID mode is enabled: Step 1 Tap “Function”...

  • Page 83: Insulation Monitoring Function

    SUNGROW’s MV Grid-connected PV Inverter is equipped with insulation resistance monitoring function to detect the system insulation resistance in real time.

  • Page 84: Tripping Functions Of The Dc Main Switches

    10 Main Functions User Manual In emergency situation, open the monitoring window, press down the emergency stop button to stop all the inverter units inside the MV Grid-connected PV Inverter immediately. 10.12 Tripping Functions of the DC Main Switches There are two selections (Enable/Disable) for the parameter “Trip” in the running parameter of the LCD screen.

  • Page 85: Islanding Protection

    User Manual 10 Main Functions 10.13.4 Islanding Protection Islanding is a condition that can occur if the grid is disconnected while the MV Grid- connected PV Inverter is operating and the local load of the MV Grid-connected PV Inverter is similar to the present output power. “Islanding”...

  • Page 86: Troubleshooting

    The model number can be acquired from the marking of the MV Grid-connected PV Inverter or the component itself. If otherwise, contact SUNGROW. If the field work needs to replace the components with products from other manufacturer or with different model number, a prior analysis and confirmation by SUNGROW is needed.

  • Page 87: Fault And Troubleshooting On The Inverter

    • Power limitation state If there is any questions or doubts that are not covered by this manual, contact us. With the following information provided, SUNGROW shall diagnose and solve the problem more easily: • Type and serial number of the MV Grid-connected PV Inverter and internal devices •...
  • Page 88 In this case, do not attempt to power it off and try to restore the inverter, instead, contact SUNGROW personnel for the support. Disconnect the AC and DC switches of the The contactor is...
  • Page 89 User Manual 11 Troubleshooting Fault Fault Explanation Measures severity name 1. Check the grid voltage, and inspect whether the grid voltage harmonic is normal. Faults occur Temp due to 2. Check whether the fans operate normally. control excessively high 3. Check the AC filtering system, and inspect Major cabinet temperature...
  • Page 90 11 Troubleshooting User Manual Fault Fault Explanation Measures severity name temperature in cabinet the DC cabinet Major Refer to the measures for "Temp-flt". over- is excessively temp high. 1. Tap "Set-parameters" -＞ "Pro-parameters" on the LCD to check whether the protection parameter is in compliance with the local The grid voltage standards and regulations.
  • Page 91 User Manual 11 Troubleshooting Fault Fault Explanation Measures severity name 1. Check whether the control switches of both the internal and external power supply are in the ON or OFF positions. If all switches are in the ON position, disconnect a switch. Ctrol The control power...
  • Page 92 11 Troubleshooting User Manual Fault Fault Explanation Measures severity name 1. Refer to the measure for "DC-SPD flt". 2. Check whether the micro circuit breaker The SPD on the connected in series to the SPD is disconnected. AC SPD AC side of the Major 3.
  • Page 93 User Manual 11 Troubleshooting Fault Fault Explanation Measures severity name The sampling value of the AC 1. Check whether the AC cables are damaged. leakage 2. If the LV side of the transformer is connected Major leakage- currents in the Y type, ensure that the neutral point is exceeds the unconnected.
  • Page 94 11 Troubleshooting User Manual Fault Fault Explanation Measures severity name 1. Check whether AC switches have tripped. Switch 2. Check whether AC switches are damaged. The AC flt/ 3. Check whether AC switches are connected/ Major switches are disconnected normally. faulty.
  • Page 95 User Manual 11 Troubleshooting Fault Fault Explanation Measures severity name 1. Check whether fans in the AC cabinet function normally. temperature in 2. Check whether air inlets of the AC cabinet cabinet the AC cabinet Major are obstructed. over- exceeds the 3.
  • Page 96 Check whether the DC fuse have blown. DC fuse- DC fuses of the abnorm- inverter are Minor If so, contact SUNGROW and replace the abnormal. fuses. Branch fuses of Branch the inverter are Minor Refer to the measures for "DC fuse-abnomal".
  • Page 97 Y type, ensure that the neutral point is exceeds the unconnected. protective threshold. If the fault still exists, contact SUNGROW Service. If the following fault occurs, immediately contact SUNGROW Service. (referred to as "- SUNGROW" hereinafter). Fault Explanation Fault name Measures...

  • Page 98: Fault And Troubleshooting On The Mv Transformer

    11 Troubleshooting User Manual Fault Explanation Fault name Measures severity DC Sensor- DC sensors of the Minor Contact SUNGROW. inverter are abnormal. Branch fwd- Branch forward current Minor Contact SUNGROW. Idc-high is excessively high. Branch rev- Branch reverse current Minor Contact SUNGROW.
  • Page 99 Fault severity Fault name Measures The temperature in the oil tank of the transformer is Trans-oil-T-alarm Minor Contact SUNGROW. abnormal, and an alarm is triggered. The gas is excessively high, Heavy gas alarm Minor Contact SUNGROW. and an alarm is triggered.

  • Page 100: Other Fault And Troubleshooting

    Refer to the converters are matched. "Measures". Communicate again after replacing the converter. The monitor software is installed incorrectly. It is recommended to reinstall the software. If all the above-mentioned items are correct and this fault continues, contact SUNGROW.

  • Page 101: Routine Maintenance

    12 Routine Maintenance 12.1 Overview For maintenance items beyond this manual, please confirm with SUNGROW or contact SUNGROW for maintenance, and unauthorized operation is strictly prohibited. 12.2 Safety Instructions Due to the effect of ambient temperature, humidity, dust and vibration, the MV Grid- connected PV Inverter and the internal components will age and wear.

  • Page 102: Five Safety Rules

    12 Routine Maintenance User Manual Sand and moisture penetration may affect the performance of electric devices inside the MV Gridconnected PV Inverter! • Do not perform electrical connection in sandy season or when the ambient relative humidity is above 95%. •...

  • Page 103: Maintenance Interval

    Before performing maintenance, remove the internal protective grid. Make sure to reassembly the grid and fasten all the screws after the maintenance work. Make sure all bolts are securely fixed. Repair immediately any anomalies found during routine maintenance. If any doubts arise, contact SUNGROW.
  • Page 104 12 Routine Maintenance User Manual Maintenance (once every three years) Check item Check method • Oil thermometer: alarm and tripping temperature • Pressure relief device contact check Transformer monitoring • Oil level device: Oil level is filled to the normal level protection devices •...
  • Page 105 User Manual 12 Routine Maintenance Maintenance (once every two years) Check item Check method Check the following items and make corrections if necessary: • Check whether the Station and its internal devices are damaged or deformed. • Check whether the device makes abnormal noise or System status and sound during operation.
  • Page 106 12 Routine Maintenance User Manual Maintenance (once every year) Check item Check method Check the following items and make corrections if necessary: • Check whether there inflammable combustible materials and other threats around or on the top of the Station that may affect the normal operation.
  • Page 107 User Manual 12 Routine Maintenance Check item Check method • Check whether the ground resistance meets the requirements of local standards and regulations. Grounding and • Check whether the equipotential connections inside the equipotential connections Station are performed properly. • Check whether the equipotential connection of the oil tray is performed properly.

  • Page 108: Cleaning The Mv Gridconnected Pv Inverter

    12 Routine Maintenance User Manual Note: * indicates optional. The frequency of maintenance operations could be increased according to the environmental conditions of the place where the Station is suited, plant capacity and on-site situations. The maintenance interval should be shortened if the sand or dust deposition around the operation site is serious.

  • Page 109: Checking And Cleaning The Filter

    User Manual 12 Routine Maintenance 12.4.5 Checking and Cleaning the Filter 12.4.5.1 Filter Screen at Air Inlet Brief Introduction The air inlet is located at the top of the inverter. It is recommended to clean the air inlet regularly, to avoid blocking. There are two types of air inlet design and the steps to clean them are different.

  • Page 110: Bottom Air Outlet

    12 Routine Maintenance User Manual 12.4.5.2 Bottom Air Outlet Brief Introduction The lower air outlet is located at the lower part of the inverter. It is recommended to clean the filter screen of the air outlet regularly. Procedure Unscrew the bolts at the bottom of the inverter, to remove the bottom plate. Remove the filter screen, clean them, and reassemble them when they are dry.
  • Page 111 User Manual 12 Routine Maintenance Situation 3: the undercoat is damaged and the primer is revealed Maintenance and Operation Steps for Situation 1: Materials: • Cleaning cloth • Water • Alcohol or other non-corrosiveness detergent Figure Step 1. Clean the smudginess on the surface by using a cleaning cloth (or other cleaning tool) with water.
  • Page 112 12 Routine Maintenance User Manual Figure Step 1. Polish the rough paint surface or the scratched parts by abrasive paper until the surface is smooth. 2. Clean the target parts by cleaning cloth with water or use 97% alcohol. 3. When 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 Maintenance and Operation Steps for Situation 3:...
  • Page 113 User Manual 12 Routine Maintenance Figure Step 1. Polish the damaged parts of the paint to remove the surface rust or other roughness. 2. Clean the target parts by cleaning cloth with water or use 97% alcohol to clean the surface dust and dirty. 3.

  • Page 114: Replacement Of The Electrical Components

    The model number can be acquired from the marking of the MV Grid-connected PV Inverter or the component itself. If otherwise, contact SUNGROW. If the field work needs to replace the components with products from other manufacturer or with different model number, a prior analysis and confirmation by SUNGROW is needed.
  • Page 115 12 Routine Maintenance Without our confirmation, do not replace the fuse with the one from another manufacturers or of a different model. Otherwise, SUNGROW shall not be responsible for any possible personal injury or property damage. DC Fuse Area The DC cabinet inside the inverter unit unit is equipped with DC fuses.
  • Page 116 12 Routine Maintenance User Manual Descriptions Figure 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 with a socket spanner. Fastening torque:18~23N.m.

  • Page 117: Periodic Actions

    13 Periodic Actions 13.1 Opening the Inverter Unit Door Opening the Door Lock Opening the Enclosure Insert the key. Turn the handle counterclockwise to unlock the door. Keyhole configuration is optional. Fixing the Enclosure Version 1:...

  • Page 118: Closing The Inverter Door

    13 Periodic Actions User Manual When the cabinet door is opened, the studs slide naturally. When the stud slides to the gourd hole (Figure B), the limit rod is automatically fixed. Version 2: When the cabinet door is opened,there are two limit rods at position 1 and position 2 behind the door as shown below.Place the two limit rods at 1' and 2' as shown to fix the door.
  • Page 119 User Manual 13 Periodic Actions Step 1 Lift the limit rod and close the cabinet door when the stud leaves the gourd hole(shown as C). It is strictly forbidden to close the door forcefully without lifting the limit rod. Step 2 Lock the door lock and pull out the key. (The method of operation is opposite to the method of opening the cabinet door).

  • Page 120: Appendix

    14 Appendix 14.1 System Parameter SG3000HV-MV-30 Input (DC) SG3000HV-MV-30 Max. PV input voltage 1500V Min. PV input voltage 875 V Startup input voltage 915 V MPP voltage range 875 ~ 1300 V No. of independent MPP inputs No. of DC inputs 18 / 20 / 22 / 24 Max.
  • Page 121 User Manual 14 Appendix Input (DC) SG3000HV-MV-30 Oil type Mineral oil (PCB free) or degradable oil on request Protections & Functions DC input protection Load break switch + fuse Inverter output protection Circuit breaker AC MV output protection Circuit breaker...
  • Page 122 14 Appendix User Manual Input (DC) SG3400HV-MV-30 SG3125HV-MV-30 Output (AC) AC output power 3125 kVA @ 50 ℃ 3437 kVA @ 45 ℃ Rated voltage range 20 – 35 kV Nominal grid frequency 50 Hz / 60 Hz Grid frequency range 45 ~55 Hz / 55 ~ 65 Hz <...

  • Page 123: Tightening Torques

    User Manual 14 Appendix Input (DC) SG3400HV-MV-30 SG3125HV-MV-30 Cooling method Temperature controlled forced air cooling Max. operating altitude 1000 m (standard) / > 1000 m (optional) Display LCD screen Standard: RS485, Ethernet; Optional: optical fiber Communication Q at night (Optional), L/HVRT, active & reactive power Grid support control and power ramp rate control *Parameters may vary subject to specific project requirement.

  • Page 124: Contact Information

    • Unforeseen calamity or force majeure The use of supplied software produced by Sungrow Power Supply Co., Ltd. is subject to the following conditions: • Sungrow Power Supply Co., Ltd. assumes no liability for direct or indirect damages arising from the use of Software.
  • Page 125 Sungrow Power Supply Co., Ltd. www.sungrowpower.com...

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