CN110993732A - Photovoltaic power station field assembly repairing method - Google Patents
Photovoltaic power station field assembly repairing method Download PDFInfo
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- CN110993732A CN110993732A CN201911226065.7A CN201911226065A CN110993732A CN 110993732 A CN110993732 A CN 110993732A CN 201911226065 A CN201911226065 A CN 201911226065A CN 110993732 A CN110993732 A CN 110993732A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 238000010248 power generation Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a photovoltaic power station field assembly repairing method, which takes partial photovoltaic assembly strings as constant current sources to supply power for a group string to be repaired, pulls the photovoltaic assembly strings connected with a direct current combiner box or a group string type inverter down to be connected with repairing equipment, and simultaneously performs electric injection and light injection on a single assembly through a steady-state light source and the constant current sources to improve the power value of the single assembly. In order to inhibit the heat-assisted photoinduced attenuation of the photovoltaic module and improve the power of the photovoltaic module, and further improve the yield of a photovoltaic power station, the method can repair and improve the power of the photovoltaic module and improve the generating capacity of the photovoltaic module on the spot of the photovoltaic power station by means of electric injection and light injection on the photovoltaic module string which has undergone the heat-assisted photoinduced attenuation and light-induced attenuation.
Description
Technical Field
The invention relates to a photovoltaic power station field component repairing method, and belongs to the technical field of laboratory photovoltaic power station field component repairing.
Background
With the shortage of global energy and climate warming, renewable energy such as solar power generation gradually replaces the traditional thermal power generation, and becomes a hotspot and development trend of the research in the energy field at present. In a solar power generation system, a solar cell module is used as a minimum power generation unit, and the power generation efficiency of the solar cell module determines the efficiency of the whole photovoltaic power station. The power of the photovoltaic module shows a gradual decline trend in power in a 25-year life cycle due to a series of reasons including light-induced degradation, heat-assisted light-induced degradation, raw material aging degradation and the like. The power generation capacity of the whole photovoltaic power station also shows a gradual decline trend, and the income is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to repair the problem of power reduction of the photovoltaic power station field assembly.
In order to solve the technical problem, the technical scheme of the invention is to provide a photovoltaic power station field assembly repairing method, which is characterized by comprising the following steps:
step 1: stopping a subarray inverter of a part to be repaired of the photovoltaic group string;
step 2: the photovoltaic string connected into the direct current combiner box/string type inverter is disconnected by pulling the photovoltaic string from the direct current combiner box/string type inverter and is connected into the repair equipment;
and step 3: the input end of the repair equipment is connected to the normal working part of the photovoltaic string, the normal working part of the photovoltaic string is used as a constant current source, current is reversely poured into the part to be repaired of the photovoltaic string connected to the output end of the repair equipment through internal integration, and a repair experiment is started;
and 4, step 4: after the repair experiment is finished, the photovoltaic string is pulled out of the repair device and disconnected, and the photovoltaic string is connected into the direct current combiner box/string type inverter for reduction.
Preferably, the current regulation range in step 3 is (0-15) A.
Preferably, the repair device is a direct current constant current source, and supplies the group string to be repaired in a reverse direction through rectification.
The repairing method is mainly developed under the laboratory condition, partial photovoltaic string is used as a constant current source to supply power for the group string to be repaired, the photovoltaic string connected to a direct current combiner box or a group string type inverter is pulled down to be connected with repairing equipment, and the power value of a single module is improved by simultaneously performing electric injection and light injection on the single module through a steady-state light source and the constant current source.
In order to inhibit the heat-assisted photoinduced attenuation of the photovoltaic module and improve the power of the photovoltaic module, and further improve the benefit of a photovoltaic power station, the method can repair and improve the power of the photovoltaic module and the generated energy of the photovoltaic module on the spot of the photovoltaic power station by means of electric injection and light injection on the subarray of the photovoltaic module string which has undergone the heat-assisted photoinduced attenuation and the heat-assisted photoinduced attenuation.
Drawings
Fig. 1 is a schematic view of a connection structure of a photovoltaic string during normal operation;
fig. 2 is a schematic diagram of a photovoltaic string connection repair apparatus.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The invention relates to a photovoltaic power station field assembly repairing method, which is mainly characterized in that a photovoltaic string 1 (namely a PV string) is connected into a repairing device 5 (the repairing device 5 is divided into an input end and an output end) at a direct current header box or a string type inverter 2, the input end serves as a constant current power supply to supply power to a to-be-repaired string at the output end through the internal integration of the repairing device, and an assembly power repairing and improving experiment is carried out under the condition that the irradiation is more than 800W/m 2.
The specific method of the invention is as follows:
1) stopping a subarray inverter of a part to be repaired of the photovoltaic group string 1;
2) the photovoltaic string 1 connected to the dc combiner box 2 (or the string inverter) is disconnected by pulling out from the dc combiner box 2 (or the string inverter) (as shown in fig. 1), and connected to the repair device 5 (as shown in fig. 2);
3) the input end of the repair equipment 5 is connected to the normal working part of the photovoltaic string 1, the normal working part of the photovoltaic string 1 is used as a constant current source, current is reversely poured into the part to be repaired of the photovoltaic string 1 connected to the output end of the repair equipment 5 through internal integration, the current adjusting range is (0-15) A, and a repair experiment is started;
4) after the repair experiment is finished, the photovoltaic string 1 is pulled out from the repair device 5 to be disconnected and is connected into the direct current combiner box 2 (or the string type inverter) to be restored.
The photovoltaic string 1 in normal use is connected with a direct current combiner box 2 (or a string inverter), the direct current combiner box 2 (or the string inverter) is connected with a centralized inverter 3, and the centralized inverter 3 is connected with a transformer 4. The repair equipment is a direct current constant current source, comprises an IGBT (insulated gate bipolar transistor), a terminal and the like, and can be reversely supplied to the string to be repaired through rectification.
Claims (3)
1. A photovoltaic power station field assembly repair method is characterized by comprising the following steps:
step 1: stopping a subarray inverter of a part to be repaired of the photovoltaic group string (1);
step 2: the photovoltaic string (1) connected into the direct current combiner box/string type inverter (2) is disconnected by being pulled out of the direct current combiner box/string type inverter (2) and is connected into the repair equipment (5);
and step 3: the input end of the repair equipment (5) is connected to the normal working part of the photovoltaic string (1), the normal working part of the photovoltaic string (1) is used as a constant current source, and the current is reversely poured into the to-be-repaired part of the photovoltaic string (1) connected to the output end of the repair equipment (5) through internal integration to start a repair experiment;
and 4, step 4: after the repair experiment is finished, the photovoltaic string (1) is pulled out from the repair equipment (5) to be disconnected and is connected into the direct current combiner box/string type inverter (2) for reduction.
2. The method for repairing a field component of a photovoltaic power plant of claim 1, wherein the current regulation range in step 3 is (0-15) a.
3. The method for repairing a field component of a photovoltaic power plant as claimed in claim 1, wherein the repair device is a constant direct current source and supplies the string to be repaired in a reverse direction after rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911226065.7A CN110993732A (en) | 2019-12-04 | 2019-12-04 | Photovoltaic power station field assembly repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911226065.7A CN110993732A (en) | 2019-12-04 | 2019-12-04 | Photovoltaic power station field assembly repairing method |
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| Publication Number | Publication Date |
|---|---|
| CN110993732A true CN110993732A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911226065.7A Pending CN110993732A (en) | 2019-12-04 | 2019-12-04 | Photovoltaic power station field assembly repairing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023048637A3 (en) * | 2021-08-27 | 2023-07-06 | Etavolt Pte Ltd | Regeneration of degraded silicon photovoltaic modules: indoor and outdoor solutions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472791A (en) * | 2009-08-04 | 2012-05-23 | 国立大学法人奈良先端科学技术大学院大学 | Solar cell evaluation method, evaluation device, maintenance method, maintenance system, and method of manufacturing solar cell module |
| CN108306612A (en) * | 2017-12-20 | 2018-07-20 | 华为技术有限公司 | A kind of photovoltaic module decaying restorative procedure in photovoltaic plant and device |
| CN109428544A (en) * | 2017-09-04 | 2019-03-05 | 丰郅(上海)新能源科技有限公司 | The switching method that photovoltaic module is accessed or removed is realized in battery strings group |
| CN109474020A (en) * | 2019-01-09 | 2019-03-15 | 无锡硅动力微电子股份有限公司 | A kind of photovoltaic module intelligence turning off system and its method |
-
2019
- 2019-12-04 CN CN201911226065.7A patent/CN110993732A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472791A (en) * | 2009-08-04 | 2012-05-23 | 国立大学法人奈良先端科学技术大学院大学 | Solar cell evaluation method, evaluation device, maintenance method, maintenance system, and method of manufacturing solar cell module |
| CN109428544A (en) * | 2017-09-04 | 2019-03-05 | 丰郅(上海)新能源科技有限公司 | The switching method that photovoltaic module is accessed or removed is realized in battery strings group |
| CN108306612A (en) * | 2017-12-20 | 2018-07-20 | 华为技术有限公司 | A kind of photovoltaic module decaying restorative procedure in photovoltaic plant and device |
| CN109474020A (en) * | 2019-01-09 | 2019-03-15 | 无锡硅动力微电子股份有限公司 | A kind of photovoltaic module intelligence turning off system and its method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023048637A3 (en) * | 2021-08-27 | 2023-07-06 | Etavolt Pte Ltd | Regeneration of degraded silicon photovoltaic modules: indoor and outdoor solutions |
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Application publication date: 20200410 |