In response to the differences in fault response capabilities among different topology structures of PV arrays, the output characteristics of 13 different topology structures are analyzed under four typical faults： partial shading, short-circuit fault, open-circuit fault, and component aging. Based on the characteristics of different scenarios such as ports, mountainous areas, and the Gobi and desert, optimization suggestions for PV array topology structures are proposed. The experimental results show that using the maximum power point output as the evaluation index, the optimal structures under local shading fault, short-circuit fault and open-circuit fault respectively are TCT structure, SP structure and TCT structure. At the same time, when the components are aging, the changes in the output characteristics of the topology under different faults show no significant differences. After further comprehensive analysis, it is believed that the most suitable topology structures in the port environment are SP structure and BL structure, the most suitable topology structure in mountainous environment is SP-TCT structure, and the most suitable topology structure in the Gobi and desert environments is BL-TCT structure.
Key words
solar energy /
PV power generation /
photovoltaic system /
photovoltaic array /
photovoltaic cells /
topology
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