Method for detecting and positioning hot spots of photovoltaic module based on infrared videos

A photovoltaic module and positioning method technology, which is applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve the problems of burning out components, high risk of inspection, and low efficiency of manual inspection, so as to ensure safe operation Effect

Inactive Publication Date: 2018-11-30
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

Among them, the hot spot phenomenon greatly reduces the power generation efficiency of photovoltaic modules, and in severe cases, it will burn out the components and cause permanent damage to the components
The common method is fault monitoring system and manual i

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  • Method for detecting and positioning hot spots of photovoltaic module based on infrared videos
  • Method for detecting and positioning hot spots of photovoltaic module based on infrared videos
  • Method for detecting and positioning hot spots of photovoltaic module based on infrared videos

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Embodiment Construction

[0015] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] Threshold Segmentation Based on Maximum Between-Class Variance

[0017] The main feature of the hot spot is high temperature, which is an obvious bright spot in the infrared image. Using this feature of the hot spot, the binarized image can be used to find the hot spot through contour extraction and calculate the size and location information of the hot spot. Infrared images contain a lot of redundant information. Firstly, the infrared images are converted into grayscale images. In order to highlight the outline of the hot spot, the grayscale image is binarized. Image binarization is beneficial to further reduce the amount of data in the...

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Abstract

The invention discloses a method for detecting and positioning hot spots of a photovoltaic module based on infrared videos. The method comprises the following steps that S1, image preprocessing is realized through algorithms of threshold segmentation of OTSU, image denoising and the like; S2, all contours of an image are traversed through a contour extraction algorithm, infrared image hot spot detection is completed, and the information of the position of frames where hot spots are placed, the area of the hot spots and the like are calculated; S3, a photovoltaic cell module is subjected to linear segmentation through a line segment detection (Lsd) algorithm, and photovoltaic arrays are marked with numbers; S4, the names of the videos, the rows and columns where the hot spots are placed inthe photovoltaic module constitute three-dimensional coordinates to represent the specific positions of the hot spots, and the hot spot positioning of solar cell modules is achieved. According to themethod, a novel hot spot fault detection system is established by an unmanned aerial vehicle combining with a thermal infrared imager, hot spot detecting and positioning are achieved accurately and efficiently, and safe operation of a photovoltaic power station is guaranteed.

Description

technical field [0001] The invention relates to the field of hot spot detection, in particular to a method for detecting and locating hot spots of photovoltaic modules based on infrared video. Background technique [0002] With the increasing shortage of global energy, photovoltaic power generation has become the focus of attention all over the world. With the rapid development of photovoltaic power stations, many unfavorable factors restrict the reliable and efficient operation of photovoltaic power stations. Among them, the hot spot phenomenon greatly reduces the power generation efficiency of photovoltaic modules, and in severe cases, it will burn out the modules and cause permanent damage to the modules. The common method is fault monitoring system and manual inspection to avoid the harm caused by hot spots, but the photovoltaic power station monitoring system cannot find hot spot faults in a timely and accurate manner, the efficiency of manual inspection is low, and th...

Claims

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Application Information

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IPC IPC(8): H02S50/15
CPCH02S50/15Y02E10/50
Inventor 门洪吕来辰孙超翟文龙
Owner NORTHEAST DIANLI UNIVERSITY
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