CN202093155U - Large-volume multi-adaptable detection platform for grid-connected photovoltaic inverter - Google Patents

Large-volume multi-adaptable detection platform for grid-connected photovoltaic inverter Download PDF

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Publication number
CN202093155U
CN202093155U CN2011201348150U CN201120134815U CN202093155U CN 202093155 U CN202093155 U CN 202093155U CN 2011201348150 U CN2011201348150 U CN 2011201348150U CN 201120134815 U CN201120134815 U CN 201120134815U CN 202093155 U CN202093155 U CN 202093155U
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CN
China
Prior art keywords
inverter
output
grid
direct current
power supply
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CN2011201348150U
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Chinese (zh)
Inventor
冯炜
陈志磊
李臻
秦筱迪
夏烈
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国网电力科学研究院
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Priority to CN2011201348150U priority Critical patent/CN202093155U/en
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Publication of CN202093155U publication Critical patent/CN202093155U/en

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Abstract

A large-volume multi-adaptable detection platform for a grid-connected photovoltaic inverter comprises an isolation transformer, a controlled direct current power supply, a power grid disturbance generator, a multi-tap transformer and an RLC (resistance, inductance and capacitance) load centralized control system, wherein the controlled direct current power supply serves as the input of the to-be-detected inverter; an inlet wire is connected with the isolation transformer; the output of the isolation transformer is a test bus; one branch of the test bus serves as the input of the controlled direct current power supply after passing through the isolation transformer; the output of the controlled direct current power supply is connected with the to-be-detected inverter; another branch of the test bus is connected with the power grid disturbance generator after being subject to voltage reduction by the isolation transformer; the output of the power grid disturbance generator is connected with the multi-tap transformer; and the output of the multi-tap transformer is connected with the alternating current side of the inverter to be detected. The detection platform achieves high automation of the detection of the inverter.

Description

High capacity flexible grid-connected photovoltaic inverter detection platform
Technical field
The utility model belongs to new energy field, mainly is the detection technique at the every performance test of grid-connected photovoltaic inverter, especially relates to a kind of high capacity flexible grid-connected photovoltaic inverter detection platform.
Background technology
The grid-connected photovoltaic inverter plays a part the direct current output of cell panel is converted to interchange as the elementary cell of photovoltaic plant, is the bridge of electrical network and assembly.The little small-sized household inverter that arrives several kilowatts of big photovoltaic plant to MW class all needs by various performance tests before coming into operation.Country variant is to the test event difference of inverter, even identical project, technical requirement also has than big-difference.The test event of photovoltaic DC-to-AC converter mainly comprises be incorporated into the power networks characteristic test and current techique test.Detection platform simulation inverter actual motion environment comprises input, output and the load of inverter, and the people is for simulating various operating modes to reach test purpose.Fig. 1 is the inverter detection platform pie graph that generally uses at present.
Wherein, controllable direct current power supply simulation photovoltaic panel array output characteristics, utility network or simulation electrical network connect the output of inverter, and the RLC load is as the load of inverter, and load generally can be regulated inductance value, capacitance and resistance value separately.
There are 2 deficiencies in present this detection platform: the detection capacity is big inadequately, and is not strong to the compatibility of tested inverter.
Fast development along with domestic photovoltaic industry, the construction of extensive centralized photovoltaic plant, market is increasing to the demand of high capacity inverter, single-machine capacity has reached 630kW, the partial test project need be carried out under full power, and this will ask input, output and the load capacity of inverter to match.
Unified standard code is not done to the output voltage grade of inverter by country at present, the output of inverter has from 120V to 400V, even the large-scale inverter band 10kV that the has change of boosting, and the utility network of China has only single-phase phase voltage 220V and two kinds of grades of three-phase line voltage 380V, and this just requires the analog electrical net can adapt to different inverters and do not reduce self capacity under the situation that voltage reduces.
Summary of the invention
The purpose of this utility model is to realize a kind of inverter detection platform that is applicable to various power grades, various output voltage grades, and this platform can be finished be incorporated into the power networks performance and the universal performance test to inverter.
To achieve these goals, the utility model adopts following technical scheme, and high capacity flexible grid-connected photovoltaic inverter detection platform comprises isolating transformer, and the attribute testing process that is used to avoid being incorporated into the power networks impacts the upper level circuit; Controllable direct current power supply is used to the input of inverter to be measured; The grid disturbance generating means is used to simulate the various characteristics of electrical network; Many tap transformers are used to adapt to the test of multiple voltage grade output inverter, regulate output, and the output voltage range of adjustment is 120V-480V; The RLC load, each 1 cover of the load of the utility model configuration 33kW, 200kW and 1000kW power; Centralized control system is used for concentrating collection voltage, electric current, frequency data.The 10kV inlet wire connects isolating transformer, and isolating transformer is output as 10kV test bus, branch of 10kV test bus by behind the transformer as the input of controllable direct current power supply, inverter is surveyed in controllable direct current power supply output reception; Another branch disturbing generating device that gets access to grid after by the transformer step-down, the output of grid disturbance generating means boosts to 10kV and connects many tap transformers, and the output of many tap transformers connects the AC side of island detection device and inverter to be measured.
The utility model provides a versatility platform for the detection of grid-connected photovoltaic inverter, this platform can adapt to the inverter of random capacity, any output voltage grade in the market, it is increasingly automated to realize that inverter detects, all switches are deciliter all by the unified operation of centralized control system, and show the data on the test loop in real time.
This detection platform can be passed through deciliter multiple function of realization of switch:
(1) by-pass switch branch detects large-scale, small-sized inverter with simulation electrical network loop;
(2) by-pass switch closes, and detects large-scale, small-sized inverter with the utility network loop;
(3) by-pass switch branch detects the inverter that large-scale band boosts and becomes with simulation electrical network loop;
(4) by-pass switch closes, and detects the inverter that large-scale band boosts and becomes with the utility network loop.
Description of drawings
Fig. 1 is the grid-connected photovoltaic inverter detection platform pie graph that generally uses at present.
Fig. 2 is a high capacity flexible grid-connected photovoltaic inverter detection platform.
Embodiment
Described detection platform wiring diagram such as Fig. 2 comprise following components:
Isolating transformer:, isolating transformer is set for the attribute testing process of avoiding being incorporated into the power networks impacts the upper level circuit.
Controllable direct current power supply: as the input of inverter to be measured, this input signal is able to programme, fully the operating characteristic of analog solar cell panel.
The grid disturbance generating means: this device purpose is the various characteristics of simulation electrical network, and for example operating mode such as voltage fluctuation, frequency jitter realizes the characteristic test of being incorporated into the power networks of inverter.
Many tap transformers: for adapting to the test of multiple voltage grade output inverter, many tap tests are installed become, can regulate output according to different inverters, to satisfy the requirement of different output levels, the utility model output voltage range of adjustment is 120V-480V.
RLC load: when doing the anti-isolated island functional test of grid-connected photovoltaic inverter, need fictitious load, each 1 cover of the load of the utility model arrangements 33kW, 200kW and 1000kW power.
Centralized control system: the switch of the utility model by the whole test platform of the unified control of centralized control system deciliter, and concentrate data such as gathering voltage, electric current, frequency.
Annexation between each device is as described below:
The 10kV inlet wire connects isolating transformer, and isolating transformer is output as 10kV test bus, branch of 10kV test bus by behind the transformer as the input of controllable direct current power supply, inverter is surveyed in controllable direct current power supply output reception; Another branch disturbing generating device that gets access to grid after by the transformer step-down, the output of grid disturbance generating means boosts to 10kV and connects many tap transformers, and the output of many tap transformers connects the AC side of island detection device and inverter to be measured.
Open the by-pass switch of Fig. 2, and the S1 that closes a switch, can accomplish the 10kV inverter that the becomes characteristic test of being incorporated into the power networks of boosting.
Grid-connected photovoltaic inverter testing goal is simulation inverter normal operative condition and extreme working condition, as shown in Figure 2, doing when being incorporated into the power networks performance test,
(1) selects a loop: controllable direct current power supply output is inserted inverter, regulate many tap transformers, make its output meet the scope that tested inverter allows, divide by-pass switch, select to connect the simulation electrical network;
(2) start the simulation electrical network, regulate the simulation electrical network and export the invertor operation scope to;
(3) start controllable direct current power supply, selecting the direct supply mode of operation is constant current, constant voltage or MPPT;
(4) start inverter, inverter work;
(5) use power quality analyzer to measure the inverter outgoing side quality of power supply;
(6) use power analyzer to measure and calculate inverter efficiency;
(7) voltage, frequency response characteristic test are carried out in the variation of regulating simulation electrical network output voltage, frequency;
(8) insert the RLC load, carry out the anti-isolated island functional test of inverter according to anti-isolated island method of testing.

Claims (3)

1. high capacity flexible grid-connected photovoltaic inverter detection platform is characterized in that, comprises isolating transformer, and the attribute testing process that is used to avoid being incorporated into the power networks impacts the upper level circuit; Controllable direct current power supply is used to the input of inverter to be measured; The grid disturbance generating means is used to simulate the various characteristics of electrical network; Many tap transformers are used to adapt to the test of multiple voltage grade output inverter, regulate output voltage; RLC load centralized control system is used for concentrating collection voltage, electric current, frequency data; Wherein, inlet wire connects isolating transformer, and isolating transformer is output as the test bus, test bus branch by behind the isolating transformer as the input of controllable direct current power supply, inverter is surveyed in controllable direct current power supply output reception; Another branch disturbing generating device that gets access to grid after by the isolating transformer step-down, the output of grid disturbance generating means connects many tap transformers, and the AC side of inverter is surveyed in the output reception of many tap transformers.
2. according to claim 1. high capacity flexible grid-connected photovoltaic inverter detection platform is characterized in that described RLC load is that power is each 1 cover of load of 33kW, 200kW and 1000kW.
3. according to claim 1. high capacity flexible grid-connected photovoltaic inverter detection platform is characterized in that described many tap transformers output voltage range of adjustment is 120V-480V.
CN2011201348150U 2011-05-03 2011-05-03 Large-volume multi-adaptable detection platform for grid-connected photovoltaic inverter CN202093155U (en)

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CN2011201348150U CN202093155U (en) 2011-05-03 2011-05-03 Large-volume multi-adaptable detection platform for grid-connected photovoltaic inverter

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866364A (en) * 2012-09-13 2013-01-09 广州三晶电气有限公司 Photovoltaic inverter test system and test method thereof
CN103063943A (en) * 2012-12-05 2013-04-24 中国电力科学研究院 System and method of detecting electric performance of photovoltaic inverter
CN103064023A (en) * 2012-12-26 2013-04-24 北京荣华恒信开关技术有限公司 Grid-tied testing device for wind electricity and photovoltaic energy and testing method thereof
CN103543324A (en) * 2012-07-09 2014-01-29 江苏固德威电源科技有限公司 Automatic test scheme for solar inverter efficiency
CN103605014A (en) * 2013-10-23 2014-02-26 国家电网公司 Test platform for large energy storage converters
CN103944191A (en) * 2014-04-30 2014-07-23 常州思普锐电力科技有限公司 Grid-connected detection integrated device for portable distributed power supply
CN104155616A (en) * 2014-08-12 2014-11-19 中国科学院电工研究所 Photovoltaic system current transformer test platform
CN104333035A (en) * 2014-10-28 2015-02-04 国网辽宁省电力有限公司朝阳供电公司 Photovoltaic power distribution system capable of suppressing power grid voltage unbalance
CN105158618A (en) * 2015-09-30 2015-12-16 天水电气传动研究所有限责任公司 Multifunctional test platform
CN108663604A (en) * 2018-03-19 2018-10-16 许继电气股份有限公司 A kind of inverter test platform

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103543324A (en) * 2012-07-09 2014-01-29 江苏固德威电源科技有限公司 Automatic test scheme for solar inverter efficiency
CN102866364B (en) * 2012-09-13 2014-10-29 广州三晶电气有限公司 Photovoltaic inverter test system and test method thereof
CN102866364A (en) * 2012-09-13 2013-01-09 广州三晶电气有限公司 Photovoltaic inverter test system and test method thereof
CN103063943B (en) * 2012-12-05 2014-02-19 中国电力科学研究院 Method of detecting electric performance of photovoltaic inverter
CN103063943A (en) * 2012-12-05 2013-04-24 中国电力科学研究院 System and method of detecting electric performance of photovoltaic inverter
CN103064023A (en) * 2012-12-26 2013-04-24 北京荣华恒信开关技术有限公司 Grid-tied testing device for wind electricity and photovoltaic energy and testing method thereof
CN103064023B (en) * 2012-12-26 2015-10-14 北京荣华恒信开关技术有限公司 For grid-connected proving installation and the method for testing thereof of wind-powered electricity generation and photovoltaic
CN103605014A (en) * 2013-10-23 2014-02-26 国家电网公司 Test platform for large energy storage converters
CN103605014B (en) * 2013-10-23 2016-08-31 国家电网公司 A kind of test platform for large-scale energy accumulation current converter
CN103944191A (en) * 2014-04-30 2014-07-23 常州思普锐电力科技有限公司 Grid-connected detection integrated device for portable distributed power supply
CN104155616A (en) * 2014-08-12 2014-11-19 中国科学院电工研究所 Photovoltaic system current transformer test platform
CN104155616B (en) * 2014-08-12 2017-02-15 中国科学院电工研究所 Photovoltaic system current transformer test platform
CN104333035A (en) * 2014-10-28 2015-02-04 国网辽宁省电力有限公司朝阳供电公司 Photovoltaic power distribution system capable of suppressing power grid voltage unbalance
CN105158618A (en) * 2015-09-30 2015-12-16 天水电气传动研究所有限责任公司 Multifunctional test platform
CN108663604A (en) * 2018-03-19 2018-10-16 许继电气股份有限公司 A kind of inverter test platform

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Granted publication date: 20111228