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Related Manuals for Goodwe GW7000K-MVS
Summary of Contents for Goodwe GW7000K-MVS
- Page 1 Prefabricated MVS User Manual...
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Page 2: Table Of Contents
Catalog 1 About this manual ......................1 1.1 Applicable products ....................1 1.2 Model description ......................1 1.3 Applicable personnel ....................1 1.4 Manual use ....................... 2 1.5 Symbol usage ......................2 2 Safety instructions ......................4 2.1 General safety rules ....................4 2.2 Ground fault protection ..................... - Page 3 3.2.4 Internal Devices ....................14 3.2.5 Low voltage cabinet .....................14 3.2.6 Transformer room ....................17 3.2.7 Medium voltage cabinet ..................18 3.2.8 Power distribution room ..................19 4 Identify and store MVSs ....................21 4.1 Identifying MVSs .....................21 4.2 Check the integrity of transportation ..............21 4.3 Storage ........................22 5 Mechanical installation ....................
- Page 4 6.3.4 Communication wiring ..................43 6.3.5 Auxiliary power supply wiring ................43 6.4 Check after wiring is completed ................43 7 Power transmission operation ..................45 7.1 Inspection before power transmission ..............45 7.1.1 Cabinet inspection ....................45 7.1.2 Medium voltage ring network cabinet ..............45 7.1.3 Medium voltage transformer ................
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Page 5: About This Manual
28*800V GW250K-HT The functions, appearance and wiring methods of the above models are the same, only the number of channels connected to the inverter is different. This manual takes GW7000K-MVS as an example, the step-up transformer in the series MVS... -
Page 6: Manual Use
• The contents of the manual and the pictures, logos, symbols, etc. used are all owned by GoodWe. Persons who are not inside our company are not allowed to publicly reproduce all or part of the content without written authorization. - Page 7 Caution "CAUTION" indicates a potential risk, if not avoided, could result in improper operation of the equipment or property damage. "Instructions" are additional information in the manual, emphasizing and supplementing the content, and may also provide optimal use of the product. Please always pay attention to the danger warning signs on the body, including: Identification...
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Page 8: Safety Instructions
2 Safety instructions All safety instructions in this manual must be strictly followed at all times. In order to avoid possible casualties and property losses during installation or operation, and to effectively extend the service life of the MVS, please be sure to read all safety instructions carefully. General safety rules ！... -
Page 9: Ground Fault Protection
Warning ！ Before operation, the locking device on the pressure relief valve must be removed. For details, refer to 7-1 Removing the locking device of the pressure relief valve". Warning ！ Mechanical installation, electrical connection, commissioning, maintenance troubleshooting must be performed by professional technicians in accordance with local regulations. -
Page 10: Use Of Measuring Equipment
Use of measuring equipment In order to ensure that all electrical parameters meet the requirements during the electrical connection and commissioning of the MVS, relevant electrical measuring equipment shall be used. Warning ！ • Choose high-quality measuring equipment whose range and usable conditions all meet the requirements of the site. -
Page 11: Body Warning Sign Protection
Body warning sign protection The warning signs on the body of the MVS and the internal electrical equipment contain important information for the safe operation of the MVS and internal equipment. It is strictly forbidden to tear or damage it! Caution Do not tear or damage the sign. -
Page 12: Other Precautions
Warning ！ The equipment should be operated in accordance with local laws and regulations and strictly follow the safety precautions specified in this manual. Warning ！ Before servicing or replacing equipment, make sure that the MVS is powered off and the high-side and low-side switches are disconnected. -
Page 13: Manual Instructions
All descriptions in this manual are standard for MVSs. If users have special needs, please explain to GoodWe staff when ordering. We will try our best to meet your needs. For the specific details of the product, please refer to the actual product you receive. -
Page 14: Product Description
3 Product Description External design of the cabinet View 3.1.1 GW7000K-MVS Unless otherwise stated, the rest take GW7000K-MVS as an example to briefly introduce the installation and wiring process of the MVS. -
Page 15: Equipment Composition
Equipment composition 3.1.2 Low voltage chamber Name Description Including low-voltage wiring areas, low- Low voltage voltage inlet holes, etc., which can be chamber connected to photovoltaic inverters Contains a medium voltage transformer.A medium voltage transformer can convert the Transformer low voltage output by the inverter to a grid compatible medium voltage. -
Page 16: Mechanical Dimensions
Mechanical Dimensions 3.1.3 Wide（W） Height（H） Depth（D） 6,058 mm 2,896 mm 2,438 mm Maximum door opening size 3.1.4 When the doors in all directions of the cabinet are opened, the maximum opening size is as shown in the figure below. -
Page 17: Internal Design Of The Cabinet
Internal design of the cabinet Internal equipment composition 3.2.1 Name Low voltage chamber Transformer Medium voltage ring network cabinet communication box and power distribution cabinet SG-10~20kVA dry-type transformer Bottom cable entry hole 3.2.2... -
Page 18: Medium Voltage Cable Entry Hole
Taking GW7000K-MVS as an example, the bottom wire entry holes are as follows: Name Description All cables connected to the low-voltage Low voltage inlet hole cabinet enter through this hole. All cables connected to the medium voltage Medium voltage inlet hole grid are inserted through this hole. - Page 19 The low-voltage cabinet consists of low-voltage cabinet A and low-voltage cabinet B, and the design of the two cabinets is the same. Taking GW7000K-MVS as an example, the following figure shows the internal components of the cabinet. *is optional. The picture is for reference only, the actual product shall prevail.
- Page 20 Effect Area Name Inside low-voltage cabinet A, it is used to connect/disconnect cabinet A. Frame circuit breaker Inside low-voltage cabinet B, it is used to connect/disconnect cabinet B. Molded case Used to connect/disconnect the corresponding terminal. circuit breaker Low voltage Connect to the front inverter.
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Page 21: Transformer Room
Transformer room 3.2.6 The transformer room mainly contains a medium voltage transformer. The transformer integrates accessories such as pressure relief valve, step switch, oil level gauge, pressure gauge, oil temperature gauge, oil filling valve and oil drain valve. The functions of each accessory are shown below. -
Page 22: Medium Voltage Cabinet
Photo Name Description The oil temperature alarm temperature is 90℃. When the oil temperature reaches this value, the alarm signal will be sent to the intelligent power distribution cabinet or client communication device. The oil temperature trip temperature is Winding 100℃. -
Page 23: Power Distribution Room
Taking the 36kV DVC combination cabinet of Daqo brand as an example, the appearance of the ring network cabinet is as follows: Power distribution room 3.2.8 The power distribution room is composed of communication box, distribution box, auxiliary transformer and UPS. The appearance and internal layout of the communication box are shown below. - Page 24 The internal layout of the power distribution room is shown below. 1.Power distribution cabinet 2.Communication cabinet 3.Heating panel 4.Fiber optic box 5.Connecting copper bar 6.UPS 7.Transformer cover 8.Dry-type transformer The picture is for reference only, the actual product shall prevail. Our company does not provide the communication box, the model is specified by the customer.The details are determined by the order agreement.
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Page 25: Identify And Store Mvss
Destruction or dismantling is strictly prohibited! Check the integrity of transportation Before leaving the factory, the staff of GoodWe has conducted a comprehensive and careful inspection of the MVS, and packaged it firmly. Nonetheless, it is possible that the device may be bumped or even damaged during transportation. -
Page 26: Storage
Storage After the successful completion of the delivery work, if it is not installed immediately, please store the MVS properly as described in this section. In order to prevent condensation in the MVS or the bottom of the box from •... -
Page 27: Mechanical Installation
系统 5 Mechanical installation Warning ！ During the whole process of mechanical installation, the relevant standards and requirements of the project location must be strictly followed. Conditions of transportation All kinds of equipment in the MVS have been installed and fixed in the MVS before leaving the factory, and the MVS can be hoisted and transported as a whole during transportation. -
Page 28: Lifting And Transporting
系统 top of the MVS to the platform base, and then fix the four fixing points on the bottom of the platform to the fixing points of the transport vehicle. In addition, when the MVS is grounded, it should also be ensured that: The ground of the MVS should be solid and flat, well drained, free from •... -
Page 29: Lifting
系统 The figure below shows the schematic diagram of crane operation in the lifting process of the MVS. truck 5-1 Schematic diagram of lifting Lifting 5.2.2 In the process of hoisting the MVS, each operation link should be carried out according to the following requirements: •... -
Page 30: Fastening Of Connectors
系统 The MVS should be lifted by four top corner pieces, as shown in the figure below Figure 5-2 Top lifting method Project equirements Steel cable length ＞6.5m Number of steel cables 4 sticks Fastening of connectors 5.2.3 The suspended ceiling of the MVS can be carried out by using slings with hooks or U-hooks. -
Page 31: Building The Foundation
• When lifting and transporting, all safety operation standards and regulations of the country/region where the project is located must be strictly observed. • GoodWe shall not be liable for any personal injury or property loss caused by violation of relevant requirements or other safety specifications. -
Page 32: Recommended Foundation Scheme
Recommended foundation scheme 5.3.2 At least the following requirements shall be met when constructing the foundation: ！ Warning The specific foundation scheme is determined by the on-site investigation of the local construction team. The following is for reference only, and should not be taken as the standard. -
Page 33: Fixed Mvs (Optional)
Fixed MVS (optional) 5.3.3 Introduction As shown in Figure A below, there are L-shaped angle steel mounting holes reserved at the bottom of the MVS. Preparation of installation tools When installing L-shaped angle steel, the tools that may be used are as follows: Name Component source... -
Page 34: Installation Check
Other protective measures Notice Drainage systems should be designed at the installation site to prevent the MVS from being immersed in water during heavy rains. Notice Do not plant any trees near the MVS installation site to avoid MVS damage due to leaves or stems. -
Page 35: Remove The Film And Box Converter Cover
5.6 Remove the film and box converter cover In the process of transportation, the heat exchanger and air conditioning in the MVS are equipped with film and PVC clip mesh cloth protective covers for packaging, as shown in Figure A and B below respectively. Before the MVS is officially put into operation, be sure to remove the above film and box PVC clip mesh cloth protective cover. -
Page 36: Electrical Connections
6 Electrical connections Safety Instructions General 6.1.1 ！ Danger High voltage danger! Danger of electric shock! • Do not touch live parts! • Before installation, make sure that the MVS and its internal equipmentare notlive. • Do not place the MVS on flammable surfaces. ！... - Page 37 Only qualified electrical engineers can carry out work related to electrical connection.Please follow the requirements given in 2 Safety Instructions in this manual. GoodWe shall not be liable for any personal injury or property damage caused by ignoring these safety instructions.
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Page 38: The Five Security Principles
Notice The installation design of the MVS must comply with the relevant standards or codes of the country/region where the project is located. If the installation design requirements given in this manual are not followed, or the installation is not carried out in accordance with the relevant electrical standards or specifications of the installation location,resulting in MVS or system failure, it will not be included in the warranty scope. -
Page 39: Wiring Schematic Diagram
Wiring schematic diagram Taking GW7000K-MVS as an example, the primary electrical schematic diagram is as follows: (specifically, the drawings shall prevail). Table 6-1 Device List Area Effect Recommended Cable Specifications Low voltage chamber Low voltage busbar and Max. 400 mm2 aluminum wire... -
Page 40: Electrical Connection
Electrical connection Before leaving the factory, the electrical connections between the equipments inside the MVS have been completed. On site, wiring between external equipment and MVSs is required, including grounding, low-voltage side wiring, medium-voltage side wiring, communication and power distribution wiring. Grounding 6.3.1 Introduction... - Page 41 If the installation is not carried out in accordance with the installation specifications, or if it is installed or modified without permission, it may cause safety accidents or equipment damage. GoodWe Electric does not assume any responsibility for any loss caused thereby.
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Page 42: Low-Voltage Wiring
Low-voltage wiring 6.3.2 Taking GW7000K-MVS as an example, the low-voltage terminals are located in the lower part of the low-voltage cabinet, as shown in the figure below. Identifying wiring terminals GW7000K-MVS includes 1QF16, 2QF16, 1QF1~1QF15, 2QF1~2QF15 and corresponding wiring terminals. - Page 43 Correspondence table between low-voltage wiring terminals and low-voltage circuit breakers Circuit breaker Connecting terminal Phase sequence 1QF1 1QF2 1QF3 1QF4 1QF5 1QF6 1QF7 1QF8 L1，L2，L3 (From left to right) 1QF9 1QF10 1QF11 1QF12 1QF13 1QF14 — — 1QF15 — — 1QF16 2QF1 2QF2...
- Page 44 Wiring copper bar size Step 1 Make sure that the output circuit breakers of each inverter at the previous stage are in the OFF state. Step 2 Make sure that both the air circuit breaker and the molded case circuit breaker are disconnected. Step 3 Thread the cable through the bottom inlet hole.
- Page 45 Step 6 Install the heat shrink tubing. Choose a heat-shrinkable tube that matches the size of the cable, and the length should be about 2cm longer than the wiring copper-nosed crimping pipe. Put the heat-shrinkable tube on the wiring copper nose to completely cover the crimping hole of the wiring copper nose.
- Page 46 When using aluminum wire for connection, the wiring sequence and components • are as follows. Name Name copper bar spring pad Flat pad Copper aluminum transition terminal bolt 4 Use a screwdriver or wrench to tighten. If M12x40 bolts are used, the tightening torque is 60~70N.m.
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Page 47: Medium Voltage Wiring
Step 8 Confirm whether the wiring terminal is fastened in place. -- End the wiring and cover the low-voltage cabinet cover. Medium voltage wiring 6.3.3 The connection terminals of the MVS and external medium voltage equipment are located inside the ring network cabinet. On site, refer to the manual of the ring network cabinet for wiring. - Page 48 The protective cable wrapping is intact and there is no obvious Cable appearance damage. The threading cable and hose are in good condition. The cable connection location is the same as the design. The terminals are made in accordance with the specifications, and the connection is firm and reliable.
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Page 49: Power Transmission Operation
7 Power transmission operation Notice The operations described in this subsection should only be performed by professionals and in accordance with local standards/regulations. Inspection before power transmission Cabinet inspection 7.1.1 Inspection item Installation meets design requirements. The bottom of the cabinet is horizontal, and each cabinet door can be opened and closed flexibly There are no cracks, dents or scratches on the surface of the cabinet. -
Page 50: Medium Voltage Transformer
Inspection item If conditions permit (with a relay protection tester or current source), check the setting of the protection device, including the setting, control word, and soft pressure plate. The setting must exactly match the setting sheet provided by the user. Confirm that the trip pressure platen is put into use. - Page 51 Inspection item The no-load tap-changer gear is placed according to the user's set value requirements. If the customer does not have a fixed value, it is placed in the rated gear (five gears for conventional transformers, and the third gear is the rated gear), and the gear fixing bolts need to be fastened into the gear slot.
- Page 52 Adjust the no-load step switch The transformer output voltage is adjusted by operating the step switch. When operating the step switch, please ensure that the transformer is in a non-excited state, that is, there is no electricity on the high and low voltage sides of the transformer.
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Page 53: Low Voltage Cabinet
Low voltage cabinet 7.1.4 Inspection item Molded case circuit breakers are in the open position. There is no obvious deformation of the copper bar, and no sundries are placed on the copper bar. Measure the ground resistance of the incoming and outgoing copper bars of the circuit breaker. -
Page 54: Power Transmission Steps
Power transmission steps Notice After running for 24 hours under no-load state and ensuring that there is no abnormality, the MVS can be run with load. Handover test, system power on and other operations must be carried out by local qualified electricians according to national / local standards. -
Page 55: Troubleshooting
8 Troubleshooting This chapter only lists common troubleshooting methods on the transformer side. For more details, please refer to the relevant transformer and ring network cabinet user manuals. Fault Possible reason Troubleshooting method phenomenon If it is a short circuit fault, perform oil chromatographic analysis to further determine the cause of the fault. - Page 56 1.Secondary circuit Check the secondary circuit and check causes false alarm of low whether there is fault. oil level. 2.The transformer leaks oil or leaks for a long Low oil level trip time. After draining the oil for maintenance or Fill the transformer with oil.
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Page 57: Routine Maintenance
9 Routine maintenance Due to the influence of ambient temperature, humidity, dust and vibration, the components inside the MVS will age and wear out, which will lead to potential failures inside the MVS. Therefore, it is necessary to carry out routine and regular maintenance on the MVS to ensure its normal operation and service life. -
Page 58: Maintenance
In order to ensure the safety of operators when maintaining or overhauling the MVS, be sure to abide by the following five safety rules Professionals ensure that MVSs cannot be re-energized accidentally . • Use electrical inspection equipment to ensure that the inside of the MVS is •... -
Page 59: Maintenance Items
！ Warning Failure to comply with the torque requirements may cause fire at the connection! During the electrical connection process, the bolts must be tightened strictly to the torques described in this manual. ！ Warning • Incorrect wiring sequence may cause fire. Please pay attention to the connection sequence of the wiring parts. - Page 60 Inspection Inspection method Period item Check whether the power cable is loose. If it is Once every loose, tighten it according to the torque specified in half a year the manual. after the first Check whether the power cables and control Cable commissionin cables are damaged, especially whether the skin in...
- Page 61 Inspection Inspection method Period item Check the transformer oil level indicator. If the oil level is low, please power off the MVS and fill in oil in time. Check whether there is oil leakage around the pressure relief valve. If yes, tighten the valve. Check the sheath of low-voltage cabinet and high- voltage cabinet to see if there is oil leakage.
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Page 62: Transformer Oil Drain Operation
9.4 Transformer oil drain operation Oil drain valve The oil drain valve is located at the bottom of the transformer. Preparation of installation tools Tools that may be used: Gear Name Component source Cleaned steel hoses and oil tanks Not included in the scope Wrench of supply 300mmx38mm adjustable wrench... -
Page 63: Paint Repair Measures
Step 3 Open the oil drain valve, and the transformer oil slowly flows from the transformer into the oil tank. Step 4 When no oil flows out of the transformer, stop draining the oil. Step 5 Close the oil drain valve and remove the oil drain hose connector and hose. - Page 64 Illustration Step Use sandpaper to polish the rough or scratched parts of the surface paint to make the surface smooth. Using a cloth dampened with water or 97% alcohol, scrub the damaged area to remove surface stains. After the surface is dry, use a soft brush to touch up the scratched parts of the paint, and try to keep the paint brushing as uniform as possible.
- Page 65 Illustration Step 1. Use sandpaper to polish the rough or scratched parts of the surface paint to make the surface smooth. 2. Using a cloth dampened with water or 97% alcohol, scrub the damaged area to remove surface stains and dust. 3.
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Page 66: Appendix
10 Appendix Technical data (reference data of the manual prototype, 10.1 the specific parameters are subject to the agreement) 7MW 33kV: Name Step-up MVS Winding material Al. Type Containerized Rated Voltage (KV) Maximum Voltage (KV) Rated Frequency (Hz) Rated Current (A) 135/2526-2526 MV/LV-LV Insulation Class(KV) - Page 67 Name Step-up Transformer Type： Oil-immersed Rated Capacity（KVA） 7000 Phases： Winding material MV Winding Rated Voltage（KV）： MV Maximum Voltage （KV） LV Rated Voltage（KV） 0.8-0.8（Matched with inverters output） Rated Frequency（Hz） ±2×2.5% Tap Changer： D,y11-y11 Connection of Winding： Impedance Voltage （%） L1L2-M 8(meet IEC60076.5) L1-M/L2-M(100% power) L1-L2 Power Frequency...
- Page 68 Name Shell Protection Class IP68 Partial Discharge Meet IEC Standard Temperature Rise Top Oil：60K Limitation（K） Wingding: 65K Rated Ratio，Losses at 75℃ ,(Power Factor of －Full Load (meet PEI 99.178%) －3/4 Load (meet PEI 99.347%) －Half Load (meet PEI 99.502%) －1/4 Load (meet PEI 99.58%) No Load Losses(W) 4000W...
- Page 69 Name Rated break current 20/1S （KA） Rated break current (KA) Dynamic Current（KA） Thermal Current 20/1 （KA/s） Protection 50/51，50/51N RMU (MV Load Switch) Type Rated Voltage（KV） Rated Current（A） Maximum Voltage 40.5 （KV） 1min power frequency withstand voltage（KV） phase to phase, to 95/118 earth/fracture 1min...
- Page 70 Name Nominal discharge current (KA) Lightning Impulse Residual Voltage (8/20S，5kA)(KV) 1mA DC Reference Voltage (KV) Current Flow Capacity >150 （2ms）(A) Large Current Impulse Meet IEC 60099-4 Withstand Large Current Discharge Meet IEC 60099-4 Current Class LV ACB Installation type Fixed Phases Rated Voltage（V）...
- Page 71 Name LV MCCB Type MCCB Phases Rated Voltage（V） Frame Rated Current （A） Trip Rated Current（A） Rated limit short-circuit breaking capacity Icu: （KA） Rated operating short- circuit breaking capacity Ics:（KA） control Type Thermal VIII LV CT Type Rated current Ratio 3000/1A Secondary Rated Capacity（VA）...
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Page 72: Tightening Torques
Name Frequency（Hz） Intelligent Integrated Measurement and Y,Outlet:RS485 Protection Device *Parameters are subject to specific projects. Table 10-1 Comparison table of rated current and short-circuit breaking current Tightening torques 10.2 In order to prevent the connection copper nose from being loosened by force, causing poor contact, or increasing the contact resistance and causing heat or even fire, it should be ensured that the following torque requirements should be met when tightening the screws of the connection... -
Page 73: Contact Information
Contact information 10.3 If you have any questions about this product, please contact us. In order to provide you with faster and better after-sales service, we need your assistance to provide the following information: • Equipment model • Equipment serial number •...
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