Study on the Shadow and Fault Characteristics for Photovoltaic Power Generation Systems

• Main Authors: Jyun-Ping Chen, 陳俊評
• Other Authors: Kuei-Hsiang Chao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/41672995479321600761

碩士 === 國立勤益科技大學 === 電機工程系 === 100 === The purpose of this thesis is to develop a photovoltaic module simulator with presetable shadow and faulty, and propose a maximum power point tracking algorithm to track the real maximum power point of a photovoltaic module array with multi-peak value P-V characteristic curve. First, the operation principle and characteristic of the proposed photovoltaic module simulator was described, and then use the proposed module simulator to construct a 90W photovoltaic module array. Measurement and analysis of different array configurations, shadow ratio and module fault are made using this photovoltaic module array. When the partial shadow or module fault of photovoltaic module array occurs, an intelligent maximum power point tracking algorithm was proposed such that the photovoltaic module array can output the maximum power under any operation conditions. Because of the proposed maximum power point tracking method based on the particle swarm optimization algorithm which can automatically memorize and judge the characteristics of tracking target, it can avoid tracking the local maximum point of the photovoltaic module array. And then, it can accurately track the global maximum power point of the photovoltaic mode array. In addition, the MATLAB software was used to simulate the proposed maximum power point tracking method. Through the simulation results, it can verify the effectiveness of the proposed maximum power tracking algorithm based on particle swarm optimization algorithm, and that indeed can be applied to any photovoltaic module array under shadow or fault cases and the results proved that the photovoltaic module simulator can replace practical photovoltaic modules.