饱和电流与品质因子对太阳电池串联的影响

摘要

基于太阳电池联接失配问题的普遍性,利用太阳电池单二极管等效电路模型及二体模型分析法,并根据基尔霍夫电流定律和电压定律,推导出串联等效电路的电流、电压方程组.采用数值法得到两种情况下各个电流的数值解,同时采用相关的曲线详细分析和讨论这两种情况下各个电流变化特性,并且给出了这两种情况下的物理解释.分析表明这些参数对太阳电池串联内部电流分布影响很大.研究结果有助于分析太阳电池和系统的损失原因.%In view of the universality for the mismatch problem of solar cells connection,by using the equivalent one-diode circuit of solar cell and analysis of two-body model,two series solar cells were selected as research object.At first,the equations of current and voltage were deduced from electrical related laws.Then,the appropriate simulation parameters were selected.By using the reverse saturation current and the diode quality factor as the independent variables,respectively,the changing characteristics of each branch current in two series solar cells were numerically discussed and analyzed under these two cases for the first time.And simple physical explanation was provided for the modeling results.The analysis shows that those parameters have different impacts on the internal currents of solar cells connection in series.Meanwhile,the results will contribute to the better comprehending of the reason for efficiency loss of solar cells and systems.