最大功率条件下串联太阳电池电流方程的确定

Determination of Serial Solar Panels' Current Equation Based on Maximum Power

基于太阳电池电流方程和基本电路理论,通过各单体太阳电池参数求解出太阳电池串联后的短路电流ISC、开路电压UOC、最大功率点电流Im、最大功率点电压Um,从而对串联后的太阳电池建立封闭的方程组,可以对反向饱和电流I0、二极管理想因子A、电池串联内阻RS这3个待定参数封闭求解,达到了确定串联后新的太阳电池电流方程的目的。对2个单体太阳电池参数一致和不同时的2种情况进行模拟实验,结果证明所提方法的正确性和可行性:理论值与实验值的误差小于2％;在理论上直接确定出串联太阳电池电流方程所需的参数。

Based on solar cell current equation and basic circuit theory, depending on individual solar cell＇s parameters solves serial solar panels＇ the short circuit current density Isc, the open circuit voltage Uoc, the current Im of maximum power, the voltage Um of maximum power. Then sets up close equation group to serial solar panels , can solve the reverse saturation current density I0, the diode ideal factor A, the series resistance Rs. Thus attains the objective for educing serial solar panels＇ current equation. At last the emulational experiments are did for individual solar cells parameters being uniform and different. Results demonstrate that the method proposed in this paper is correct and feasible： the error of theoretic values and experimental values is smaller than 2 percent, the method determines directly interrelated parameters which serial solar panels current equation needs in theoretically.