Photovoltaic power station online operation and maintenance method and system based on infrared and visible light images

Abstract

The invention provides a photovoltaic power station online operation and maintenance method and system based on infrared and visible light images. The method comprises the following steps: collectingan infrared image and a visible light image of a photovoltaic power station inspected currently, light irradiance, temperature and output voltage and current of a photovoltaic module; splicing and fusing the infrared image and the visible light image of the photovoltaic power station, and extracting hot spot features to obtain the actual position of each hot spot; in combination with the light irradiance, the temperature and the output voltage and current of the photovoltaic module, judging the shadow category of each hot spot position in sequence, and further judging whether to send a hot spot position to a current to-be-cleaned position information data packet or not; and executing a corresponding operation and maintenance strategy according to whether the inspection is the first inspection.

Description

technical field [0001] The invention belongs to the field of online operation and maintenance of photovoltaic power plants, and in particular relates to an online operation and maintenance method and system for photovoltaic power plants based on infrared and visible light images. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Large-scale photovoltaic power plants are generally built in places such as the Gobi desert. These places are sparsely populated and have sufficient light sources, but the working environment of the equipment is also relatively harsh. Solar panels that have been exposed to the outside for a long time, in addition to receiving sunlight, have to face problems such as flying sand and rocks, bird droppings, and the defects of the components themselves. Defect areas in photovoltaic modules (blocked, cracks, bubbles, dela...

AI Technical Summary

Problems solved by technology

The existence of hot spots will consume a lot of energy, which not only seriously affects the power generation efficiency of photovoltaic power plants but also seriously affects the safety of photovoltaic power plants

[0004] The inventor found that at present, the traditional operation and maintenance mode of photovoltaic power plants mainly relies on personnel on duty and equipment inspection. The operation and maintenance personnel of the power plant must hold thermal imaging cameras to regularly check the hot spots of all photovoltaic arrays in the entire power plant. This operation and maintenance mode exists The power station has problems such as long troubleshooting time, high missed detection rate, low accuracy of hot spot detection, and lagging detection results, which may easily lead to fault escalation

In addition, with the continuous expansion of the scale of photovoltaic power plants, the area occupied by photovoltaic power plants is increasing day by day, and the frequency of operating failures of photovoltaic systems is also increasing, which not only increases the workload and difficulty of operation and maintenance of photovoltaic power plants, but also increases the cost of operation and maintenance.

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