阴影条件下光伏组件旁路二极管优化配置研究

RESEARCH ON OPTIMAL CONFIGURATIONS OF BYPASS DIODES IN PV MODULE UNDER SHADING CONDITIONS

基于对阴影条件下光伏组件工作过程的分析,建立了适用于分析阴影条件下光伏组件输出特性的数学模型;针对典型旁路二极管配置方式存在的不足,提出一种"层叠式"旁路二极管配置方法;通过引入不同阴影模式的权重因子,得到阴影条件下的最优配置方案。理论分析及仿真结果表明,新配置方法能有效提高光伏组件在阴影条件下的输出效率。

Based on the analysis of PV module＇s work process under shading conditions, The PV module＇s mathematical model for the analysis of the output characteristic under shading conditions was established. In the light of disadvantages of the existing bypass diode configuration means, a kind of ＂hierarchical＂ bypass diode configuration method was put forward. The optimal configuration scheme was got based on introducing the weight factor of different shading models. Theoretical analysis and simulation results show that the new method can effectively improve the efficiency of PV module under shading conditions.