Detection method and system for silicon-based module defects of photovoltaic power station

Abstract

The invention provides a detection method and system for silicon-based module defects of a photovoltaic power station, and belongs to the technical field of photovoltaic power station detection. The detection method comprises the steps of obtaining heat distribution, an insulation resistance value and a performance attenuation characteristic of a tested photovoltaic module; and determining the defect type of the photovoltaic module according to any least one kind of the difference between the heat distribution of the photovoltaic cell and the heat distribution of a normal photovoltaic cell, or the comparison result between the insulation resistance value and a predetermined insulation resistance value, or the attenuation degree represented by the performance attenuation characteristic. According to the detection method provided by the invention, a set of defective photovoltaic module detection method applicable to onsite application is established; meanwhile, the internal defects of a track module can be effectively found in time by the detection method, so that efficient maintenance of the photovoltaic power station can be carried out in a targeted mode; the construction and installation process of the photovoltaic power station can be standardized; the production process and the quality control of manufacturers can be improved; and the long-term stable operation of the photovoltaic power station can be ensured.

Description

technical field [0001] The invention relates to a method and system for detecting defects of silicon-based components of a photovoltaic power station, and belongs to the technical field of photovoltaic power station detection. Background technique [0002] Photovoltaic modules are the core power generation equipment of photovoltaic power plants, and their performance plays a vital role in the efficient operation of power stations. At present, photovoltaic modules can be divided into three types according to materials: silicon-based, amorphous silicon semiconductors and organic polymers. Among them, silicon-based photovoltaic modules have been widely used in photovoltaic power plants because of their high conversion efficiency and low manufacturing cost. However, due to problems in process technology, equipment performance, raw material quality and other aspects during the production process, as well as local damage caused by external forces during transportation, installatio...

AI Technical Summary

Problems solved by technology

However, due to problems in process technology, equipment performance, raw material quality, etc. during the production process, as well as local damage caused by external forces during transportation, installation and operation, the performance degradation and defects of photovoltaic modules are caused.

However, in the actual operation and maintenance process, due to the large number of photovoltaic modules and the wide distribution area, photovoltaic power plants mainly adopt the maintenance methods of fault inspection and regular maintenance, and the phenomenon of over-maintenance and insufficient maintenance is common, and there is a lack of preventive maintenance test methods Relevant specifications, lack of defect detection technology and standards for components, unable to timely, effectively and accurately judge defective components and failure causes

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