CN203164323U - Identification test system for parameter of photovoltaic inverter - Google Patents
Identification test system for parameter of photovoltaic inverter Download PDFInfo
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- CN203164323U CN203164323U CN 201320077478 CN201320077478U CN203164323U CN 203164323 U CN203164323 U CN 203164323U CN 201320077478 CN201320077478 CN 201320077478 CN 201320077478 U CN201320077478 U CN 201320077478U CN 203164323 U CN203164323 U CN 203164323U
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Abstract
Provided by the utility model is an identification test system for a parameter of a photovoltaic inverter. One end of a testing device (3) of a direct-current input side of an inverter (8) of the system is connected with a direct-current power supply (2); a testing device of an alternating-current output side at the other side is successively connected with a switch (6) and a power grid simulation device (7); and the inverter (8) is connected in parallel with a data acquisition apparatus (5). According to the utility model, the system can supply accurate parameters of a photovoltaic inverter for power grid analyzing, thereby improving the operation reliability and operation economy. The existing testing detection platform of the photovoltaic power generation system is utilized to obtain a result of parameter identification of a photovoltaic inverter model; and influences on the parameters by the solar irradiance, the environment temperature, the power grid side voltage disturbance, and the frequency disturbance and the like are timely reflected.
Description
Technical field
The utility model relates to the pilot system in photovoltaic generation parameter identification technique field, specifically relates to a kind of identification pilot system of photovoltaic DC-to-AC converter parameter.
Background technology
Photovoltaic (PV or photovoltaic) is the abbreviation of solar photovoltaic generation system (photovoltaic power system), it is a kind of photovoltaic effect of utilizing the solar cell semiconductor material, solar radiation can directly be converted to a kind of new-generation system of electric energy, independent operating be arranged and the dual mode that is incorporated into the power networks.
Solar electrical energy generation is emerging renewable energy technologies, and what realized commercial application at present mainly is solar energy power generating and solar light-heat power-generation.Solar energy power generating has battery component modularization, convenient for installation and maintenance, characteristics such as use-pattern is flexible, is that solar electrical energy generation is used maximum technology.Solar light-heat power-generation is by light and heat collection system heating medium, and recycling tradition steam generating equipment generates electricity, and industrialization demonstrative project in recent years begins to increase.
The correctness of electric system parameter is the basis of applied analysis functions such as electric power system tide calculating, network loss analysis, fault analysis, the calculating of protective device definite value, stability analysis, electric network composition design.In recent years, along with the continuous increase of photovoltaic generation connecting system ratio, photovoltaic generation highlights day by day to the influence of electric system.Therefore, the research photovoltaic generation becomes urgently to the influence of electric system, and foundation can reflect accurately that the model of grid-connected photovoltaic power generation system and various parameter are the keys of carrying out correlative study.
In photovoltaic generating system, the photovoltaic generation unit must be converted to alternating current with direct current by inverter and link with electrical network or load, so inverter has very important effect in photovoltaic generating system.At present, in the actual use of photovoltaic DC-to-AC converter model parameter, directly adopt design parameter owing to lack the actual measurement parameter, and reason such as running environment variation, easily cause the operations staff to grasp inaccurate to the inverter model parameter, thereby reduce the reliability of model, cause every applied analysis confidence level of electric network model to reduce greatly, influence the safe and stable operation of electrical network.
Summary of the invention
For addressing the above problem, the utility model provides a kind of identification test unit of photovoltaic DC-to-AC converter model parameter, can provide photovoltaic DC-to-AC converter parameter accurately for electrical network analysis, improves operational reliability and operation economy.
Solution is:
A kind of identification pilot system of photovoltaic DC-to-AC converter parameter, its improvements are: proving installation 3 one ends of the direct current input side of the inverter 8 of described system are connected with direct supply 2, and the proving installation of the interchange outgoing side of opposite side is connected with electrical network analogue means 7 with switch 6 successively; Described inverter 8 is in parallel with data collector 5.
Further, described data collector 5 is oscillograph and/or oscillograph.
Further, described proving installation is power analyzer.
Further, described direct supply 2 is controllable direct current power supplies; Described controllable direct current power supply is the characteristic controlled current flow source device of analog solar photovoltaic cell DC power output IV.
Further, described switch 6 is the switches that are incorporated into the power networks.
Further, described electrical network analogue means is the port voltage of simulation electrical network and the equipment of frequency.
Further, described inverter 8 is photovoltaic DC-to-AC converters to be identified.
Compared with prior art, the beneficial effect that reaches of the utility model is:
1, can improve operational reliability and operation economy for electrical network analysis provides photovoltaic DC-to-AC converter parameter accurately.
2, utilize existing photovoltaic generating system test detection platform, obtain the result of photovoltaic DC-to-AC converter identification of Model Parameters, in time react solar irradiance, environment temperature, grid side voltage disturbance, frequency disturbance etc. to the influence of parameter.
Description of drawings
Fig. 1 is system chart of the present utility model;
Reference numeral:
The 1-inverter; The 2-direct supply; 3-proving installation I; 4-proving installation II; The 5-data collector; The 6-switch; 7-electrical network analogue means.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail;
One, system connects and the device function
As shown in Figure 1, Fig. 1 is system chart of the present utility model;
1, link to each other with the direct-flow input end of inverter 1 after direct supply 2 links to each other with proving installation I3, the ac output end of inverter 1 links to each other with proving installation II4, and the opposite side of power analyzer II4 links to each other with the electrical network analogue means successively with switch.
2, power analyzer is in order to measure electric efficiency and the total efficiency of inverter power conversion, and power analyzer I measures the direct current power input of inverter, and power analyzer II measures the interchange output power of inverter.
3, oscillograph/oscillograph is used for gathering and recording input, the output waveform of inverter 1, also can be used to record input electric parameters and the output electric parameters of inverter.When to the DC side of inverter and exchange side upset test is set, identification solar irradiance, environment temperature, grid side voltage disturbance, frequency disturbance etc. obtain test parameters to the influence of the parameter of inverter.
4, controllable direct current power supply is the characteristic controlled current flow source device of a kind of analog solar photovoltaic cell DC power output IV.Be used for analog solar photovoltaic cell characteristic, within the specific limits, when changing its port voltage, controllable direct current power supply flows according to solar-energy photo-voltaic cell IV family curve output DC.Controllable direct current power supply commonly used has following three kinds: (1) rotary convertor group---form unit with AC motor and Dyn., to obtain adjustable DC voltage.(2) state type controlled rectifier---with the controlled rectifier of state type, to obtain adjustable DC voltage.(3) dc chopper or pulse width modulated inverter---with the Constant Direct Current power supply or do not control rectifier power source power supply, utilize the copped wave of electronic power switch device or carry out width modulation, to produce variable average voltage.
5, electrical network analogue means: exchange side with inverter and be connected, simulation actual electric network characteristic can arrange voltage disturbance, frequency disturbance, can change inverter port voltage amplitude and frequency, the AC characteristic of test inverter.
Two, embodiment
1, the implementation process of 1 pair of pilot system explanation by reference to the accompanying drawings:
Controllable direct current power supply 2 simulated light photovoltaic array direct current energy IV characteristics, output link to each other with inverter 1 to be identified by behind the overpower analyser 3; The interchange outgoing side of inverter 1 links to each other with the switch 6 that is incorporated into the power networks through power analyzer 4, the cut-offfing of be incorporated into the power networks switch 6 control inverters and electrical network analogue means 7; When being incorporated into the power networks switch 6 contact closure, be formed for simulating the pilot system of grid-connected photovoltaic power generation system.
When test inverter parameter, inverter 1 to be identified is in parallel with inverter with oscillograph/oscillograph 5.When inverter to be identified 1 starts, gather and record input waveform and the output waveform of inverter 1 synchronously, up to inverter 1 stable operation; Inverter 1 stable operation stage, the input electric parameters of oscillograph/oscillograph 5 record inverters and output electric parameters, thus obtain the inverter parameter.
When test positive irradiance, environment temperature, grid side voltage disturbance, frequency disturbance etc. during to the influencing of inverter parameter, the maximum power point performance number of controllable direct current power supply 2 is set to the rated power of inverter 1; Electrical network analogue means 7 voltages, frequency adjustment are the ratings of inverter work; Switch 6 closures are incorporated into the power networks; The running test loop.Different test conditions is set, by DC side and interchange side are arranged upset test, the data of observation oscilloscope/oscillograph 5, identification solar irradiance, environment temperature, grid side voltage disturbance, frequency disturbance etc. are to the influence of parameter, thereby obtain required test parameters.
2, obtain the test of inverter data, illustrate:
A. controllable direct current power supply simulated light photovoltaic array output characteristics;
B., the maximum power point performance number that controllable direct current power supply is set is inverter rated power;
C. regulating electrical network analogue means 7 voltages and frequency is the ratings of inverter work; The closure switch 6 that is incorporated into the power networks;
D. start inverter to be identified, this moment, oscillograph/oscillograph 5 was in parallel with inverter 1, gathered and recorded inverter to be identified 1 synchronously and start input, output waveform constantly, up to inverter stable operation;
E. inverter stable operation stage, oscillograph/oscillograph record inverter input, output electric parameters: input voltage, electric current, output voltage, electric current;
F. change voltage or the frequency of electrical network analogue means 7, or change the output current size of the controllable direct current power supply of simulated light photovoltaic array output characteristics, repeat said process, obtain the inverter parameter.
G, by to DC side and exchange side upset test is set, identification solar irradiance, environment temperature, grid side voltage disturbance, frequency disturbance etc. obtain to disturb the test parameters to the inverter influence to the influence of parameter.
Should be noted that at last: above embodiment only be used for explanation the application technical scheme but not to the restriction of its protection domain; although with reference to above-described embodiment the application is had been described in detail; those of ordinary skill in the field are to be understood that: those skilled in the art still can carry out all changes, revise or be equal to replacement to the embodiment of application after reading the application; these changes, revise or be equal to replacement, all within the claim protection domain that application is awaited the reply.
Claims (7)
1. the identification pilot system of a photovoltaic DC-to-AC converter parameter, it is characterized in that: proving installation (3) one ends of the direct current input side of the inverter of described system (8) are connected with direct supply (2), and the proving installation of the interchange outgoing side of opposite side is connected with electrical network analogue means (7) with switch (6) successively; Described inverter (8) is in parallel with data collector (5).
2. as the identification pilot system of claims 1 described a kind of photovoltaic DC-to-AC converter parameter, it is characterized in that: described data collector (5) is oscillograph and/or oscillograph.
3. as the identification pilot system of claims 1 described a kind of photovoltaic DC-to-AC converter parameter, it is characterized in that: described proving installation is power analyzer.
4. as the identification pilot system of claims 1 described a kind of photovoltaic DC-to-AC converter parameter, it is characterized in that: described direct supply (2) is controllable direct current power supply; Described controllable direct current power supply is the characteristic controlled current flow source device of analog solar photovoltaic cell DC power output IV.
5. as the identification pilot system of claims 1 described a kind of photovoltaic DC-to-AC converter parameter, it is characterized in that: described switch (6) is the switch that is incorporated into the power networks.
6. as the identification pilot system of claims 1 described a kind of photovoltaic DC-to-AC converter parameter, it is characterized in that: described electrical network analogue means is the port voltage of simulation electrical network and the equipment of frequency.
7. as the identification pilot system of claims 1 described a kind of photovoltaic DC-to-AC converter parameter, it is characterized in that: described inverter (8) is photovoltaic DC-to-AC converter to be identified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320077478 CN203164323U (en) | 2013-02-20 | 2013-02-20 | Identification test system for parameter of photovoltaic inverter |
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| CN 201320077478 CN203164323U (en) | 2013-02-20 | 2013-02-20 | Identification test system for parameter of photovoltaic inverter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543363A (en) * | 2013-10-31 | 2014-01-29 | 国家电网公司 | Photovoltaic inverter parameter identifying device |
| CN103592528A (en) * | 2013-08-29 | 2014-02-19 | 国家电网公司 | Photovoltaic inverter model parameter identification method based on dynamic locus sensitivity |
| CN103675524A (en) * | 2013-11-14 | 2014-03-26 | 国家电网公司 | Photovoltaic power generation system model parameter identification test method |
| CN104333326A (en) * | 2014-11-19 | 2015-02-04 | 东南大学 | Experimental method for external characteristic test of photovoltaic inverter controller |
| CN105137145A (en) * | 2014-06-05 | 2015-12-09 | 国网山西省电力公司电力科学研究院 | High precision anti-interference wave recorder |
| CN105203883A (en) * | 2015-09-23 | 2015-12-30 | 国网青海省电力公司 | Unbiased estimation photovoltaic inverter parameter identification method based on dual-density wavelet network |
| CN105301404A (en) * | 2015-11-16 | 2016-02-03 | 国家电网公司 | Solar cell simulator used for photovoltaic grid-connected inverter detection |
| CN108459226A (en) * | 2018-04-24 | 2018-08-28 | 合肥市艾特米信息技术有限公司 | Photovoltaic DC-to-AC converter automatization test system |
| CN111864802A (en) * | 2020-08-12 | 2020-10-30 | 阳光电源股份有限公司 | Photovoltaic system direct current side power electronic equipment and test system and control method thereof |
| CN113687258A (en) * | 2021-09-10 | 2021-11-23 | 阳光电源股份有限公司 | Direct-current power supply system and direct-current arc detection method and device thereof |
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2013
- 2013-02-20 CN CN 201320077478 patent/CN203164323U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592528A (en) * | 2013-08-29 | 2014-02-19 | 国家电网公司 | Photovoltaic inverter model parameter identification method based on dynamic locus sensitivity |
| CN103592528B (en) * | 2013-08-29 | 2016-04-20 | 国家电网公司 | A kind of photovoltaic DC-to-AC converter model parameter identification method based on dynamic trajectory sensitivity |
| CN103543363A (en) * | 2013-10-31 | 2014-01-29 | 国家电网公司 | Photovoltaic inverter parameter identifying device |
| CN103675524B (en) * | 2013-11-14 | 2017-06-16 | 国家电网公司 | A kind of photovoltaic power generation system model parameter identification test method |
| CN103675524A (en) * | 2013-11-14 | 2014-03-26 | 国家电网公司 | Photovoltaic power generation system model parameter identification test method |
| CN105137145A (en) * | 2014-06-05 | 2015-12-09 | 国网山西省电力公司电力科学研究院 | High precision anti-interference wave recorder |
| CN104333326A (en) * | 2014-11-19 | 2015-02-04 | 东南大学 | Experimental method for external characteristic test of photovoltaic inverter controller |
| CN105203883A (en) * | 2015-09-23 | 2015-12-30 | 国网青海省电力公司 | Unbiased estimation photovoltaic inverter parameter identification method based on dual-density wavelet network |
| CN105301404A (en) * | 2015-11-16 | 2016-02-03 | 国家电网公司 | Solar cell simulator used for photovoltaic grid-connected inverter detection |
| CN108459226A (en) * | 2018-04-24 | 2018-08-28 | 合肥市艾特米信息技术有限公司 | Photovoltaic DC-to-AC converter automatization test system |
| CN111864802A (en) * | 2020-08-12 | 2020-10-30 | 阳光电源股份有限公司 | Photovoltaic system direct current side power electronic equipment and test system and control method thereof |
| CN111864802B (en) * | 2020-08-12 | 2022-05-24 | 阳光电源股份有限公司 | Photovoltaic system direct current side power electronic equipment and testing system and control method thereof |
| CN113687258A (en) * | 2021-09-10 | 2021-11-23 | 阳光电源股份有限公司 | Direct-current power supply system and direct-current arc detection method and device thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE JIANGSU EL Free format text: FORMER OWNER: STATE GRID CORPORATION OF CHINA Effective date: 20140212 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140212 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210003 NANJING, JIANGSU PROVINCE TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140212 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Patentee after: JIANGSU ELECTRIC POWER Co. Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Patentee before: China Electric Power Research Institute Patentee before: State Grid Corporation of China |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |