太阳电池一般电流模型参数的解析解

ANALYTIC SOLUTIONS OF SOLAR CELL MODEL PARAMETERS

在太阳电池一般电流模型的基础上,通过对电流方程的微分求导和在短路点处的简化,将复杂的超越方程转换为简单的代数方程,结合电流方程在最大功率点处的极值表述,建立了求解串联内阻R_s、并联电阻R_(sh)、光生电流I_(ph)、反向饱和电流I_0以及二极管理想因子等5个电性参数的封闭代数方程组,从而得到了各个参数的解析解。对计算结果与实验数据进行比较,结果证明这种方法具有很高的计算精度,并大大减少了数值解法在提取参数过程中的计算代价。

Based on solar cell current model, and transforming I- V equation from the complicated transcendental equation into the simple algebraic equation by differential coefficient to current equation and simplifying at short circuit, combining with the description at the maximum power point, a close algebraic equation group for solving the series resistance Rs, the shunt resistance Rsh , the photo-generated current Iph, the reverse saturation current density Io and the diode ideal factor n was set up, then analytic solutions of various model parameters were deduced. Finally, the comparisons between the calculation results with experimental data show that the method is very accurate and fast, and calculation cost in the pro- cess of extracting parameters was greatly reduced by numerical method.