IAO Supeng1, YANG Yan2, CHEN Shiqun3, GAO Wei3, YANG Gengjie3
1. Guodian Nanjing Automation Co., Ltd, Nanjing 211100; 2. Faculty of Automation, Huaiyin Institute of Technology, Huaian, Jiangsu 223003; 3. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108
Abstract:The fault diagnosis method based on condition monitoring is an effective way to improve the reliability and safety of photovoltaic systems. The output of the photovoltaic array has non-linear characteristics and is easily affected by external environmental interference. These reasons make it difficult for traditional protection devices to detect its DC side faults. The failure of the photovoltaic array will not only reduce the power generation and damage the photovoltaic modules, but also cause large-scale fires in severe cases. In order to deal with this problem, the methods of photovoltaic array fault detection are constantly being proposed by experts and scholars. This research summarizes the common fault detection methods. In this paper, the common fault types and characteristics of photovoltaic arrays are introduced, and the advantages and disadvantages of common detection methods are summarized at the end.
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