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Grid-connected photovoltaic power station debugging method

A debugging method and technology for photovoltaic power plants, applied in photovoltaic power generation, photovoltaic modules, circuit breaker testing and other directions, can solve problems such as unfavorable safe and stable operation of power plants, and achieve the effect of reducing the possibility of sudden power outages

Active Publication Date: 2020-01-17
SEPCO ELECTRIC POWER CONSTR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] After the photovoltaic modules and electrical equipment of the power station are installed, electrical debugging must be carried out. At present, electrical debugging includes photovoltaic module testing, inverter debugging, box-type transformer testing, etc., and high-voltage cables and other equipment have not been retested, which is not conducive to ensuring the power station Safe and stable operation

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the drawings and embodiments.

[0032] The grid-connected photovoltaic power station debugging method of the present invention includes photovoltaic component testing; inverter debugging; box-type transformer test; high-voltage cable withstand voltage test; and relay protection system debugging. specifically:

[0033] Photovoltaic module testing

[0034] When all the components are connected according to the design requirements, the fuse circuit breaker in the combiner box is in the off position; the internal lightning protection module is installed and grounded firmly and reliably, and the conduction is good; the monitoring loop communication is good; the polarity of the photovoltaic string is tested; Under the same test conditions, the voltage deviation between the same type of photovoltaic strings should not be greater than 2%; there is no abnormality in the string cable temperature to ensure that th...

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Abstract

The invention discloses a grid-connected photovoltaic power station debugging method. The method comprises the steps of testing a photovoltaic module; debugging an inverter; testing a box-type transformer; performing a withstand voltage test on a high-voltage cable; and debugging a relay protection system. By additionally carrying out the withstand voltage test on the high-voltage cable and debugging the relay protection system, the hidden faults of the cable and the relay protection system can be found in advance, and the possibility of sudden power failure accidents caused by the faults of the cable and the relay protection system in the future is reduced.

Description

Technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a method for debugging a grid-connected photovoltaic power station. Background technique [0002] As the society attaches great importance to ecological and environmental protection in recent years, it has vigorously developed renewable energy sources. Photovoltaic power generation has become an irreplaceable part of it due to its inexhaustible, non-polluting, and free from geographical restrictions on resource distribution. After years of development and continuous progress in production technology, the conversion efficiency of photovoltaic power generation modules has gradually increased, while production costs have continued to decline, and a large number of photovoltaic projects have been developed everywhere. According to statistics, the global installed capacity of photovoltaics in 2018 was about 103.3GW, coupled with the reduction in the prices of photovol...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S50/00G01R31/327G01R31/12G01R1/04
CPCG01R1/0416G01R31/12G01R31/327H02S50/00Y02E10/50
Inventor 冯军胡俊谯华林
Owner SEPCO ELECTRIC POWER CONSTR CORP