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Defect diagnosis method and device for photovoltaic power station

A photovoltaic power station, defect diagnosis technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules and other directions, can solve problems such as low detection efficiency, and achieve the effect of improving efficiency

Active Publication Date: 2020-08-04
NORTH CHINA ELECTRICAL POWER RES INST +3
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Problems solved by technology

Since the number of photovoltaic modules in a photovoltaic power station is 100,000, the detection methods and equipment for components in the existing technologies are mostly used in the stage of module receipt and handover to the construction unit. There is no defect detection method from the operation level of photovoltaic power stations. low efficiency

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  • Defect diagnosis method and device for photovoltaic power station
  • Defect diagnosis method and device for photovoltaic power station
  • Defect diagnosis method and device for photovoltaic power station

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0035] The inventors found that the conventional maintenance methods of general photovoltaic power stations include daily inspection, online data statistics, troubleshooting and other methods. Only relying on this passive troubleshooting method, abnormal power generation efficiency and invisible defects in the power station cannot be evaluated and located. Since the inventor considered the technical problems existing in the prior art, he proposed a technical method for power generation performance evaluation and defect diagnosis of photovoltaic power plants, aiming to achieve two purposes: (1) t...

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Abstract

The invention provides a defect diagnosis method and device for a photovoltaic power station. The method includes the following steps: collecting test data during the operation of a photovoltaic powerstation to be diagnosed; according to the test data, determining an annual performance PR value of the photovoltaic power station to be diagnosed, a PR value of each power generation unit of the photovoltaic power station to be diagnosed, and the PR value, weighting efficiency, parallel mismatch loss or series mismatch loss of components included in each power generation unit; and diagnosing positioning defects of the photovoltaic power station to be diagnosed layer by layer based on a PR evaluation threshold model and according to the PR value of the photovoltaic power station to be diagnosed, the PR value of each power generation unit of the photovoltaic power station to be diagnosed, and the PR value, weighting efficiency, parallel mismatch loss or series mismatch loss of the components included in each power generation unit, wherein the PR evaluation threshold model is predetermined based on actual measured data of the photovoltaic power station on the scene. According to the above technical scheme, the defect detection of the photovoltaic power station from the operation level can be implemented, and the efficiency of defect diagnosis of the photovoltaic power station can beimproved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power station detection, in particular to a defect diagnosis method and device for a photovoltaic power station. Background technique [0002] On January 11, 2016, the National Energy Administration issued the "Guiding Opinions on Improving the Scale Management of Solar Power Generation and Implementing Competitive Mode Allocation Projects". The document stipulates that for investment entities in ordinary photovoltaic power plants and advanced photovoltaic power generation bases, each region needs to formulate competition rules. It should include competitive factors such as on-grid electricity price, enterprise technology and investment capabilities, maturity of project preliminary work, comprehensive land use, contribution to local economic transformation, and enterprise integrity performance. No matter what kind of allocation project method based on market competition is adopted, such as pu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S50/00H02S50/15
CPCH02S50/00H02S50/15Y02E10/50
Inventor 巩宇李智宋鹏李娜刘辉
Owner NORTH CHINA ELECTRICAL POWER RES INST
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