基于Simulink的三结聚光太阳能电池建模与仿真研究

Research on modeling and simulation of triple-junction concentrator solar cell based on simulink

模拟仿真的对象选择为Spectrolab公司生产的CIMJ三结(InGaP/InGaAs/Ge)聚光太阳能电池。依据单二极管等效原理建立三结太阳能电池模型,光照条件选择为AM0,采用黑体辐射理论,通过理论计算方法得到各层子电池的短路电流密度,将参数代入基于Matlab软件的Simulink模块建立三结太阳能电池的电路仿真模型。基于该模型并结合Spectrolab公司提供的电池各参数值,首先验证了该仿真模型通过理论计算得到的输出特性与Spectrolab公司实验所得的数据一致。改变温度以及聚光条件,利用理论计算方法、电路仿真模型以及Spectrolab公司提供的电池参数得到对应的输出特性曲线。最终结果表明:在AM0光照条件下,当温度为0,聚光因子1到450的增长过程中,CIMJ电池的光电转换效率达到最大的32.93%,进而在由450增长到1000的过程中,光电转换效率有所下降。该仿真模型的建立,可以预测太阳能电池在太空中各种温度及光照条件下的性能,为太阳能电池在航天器供电系统中的应用提供了一定的指导。

A simulation model of triple-junction solar cell was established based on the widely used single Diode equivalent circuit model. Taking Spectrolab CIMJ triple-junction InGaP/InGaAs/Ge solar cells as an example,The short circuit current densities of each junction solar cell were calculated using blackbody radiation theory under AM0 spectrum. The output characteristics of the solar cells working under variable temperature and concentrations can be based based on the simulation model and material parameters released by Spectrolab. From the aspect of solar cell photoelectric efficiency, the efficiency is improved when concentration increased from 1 to 450, however, The efficiency drops down slightly as concentration factor further increases to 1000. At 0°C, the photoelectric conversion efficiency of CIMJ triple-junction solar cells reaches a maximum value of 32.93% with concentration factor equals 450 under AM0 spectrum. The output performance parameters of the Spectrolab CIMJ triple-junction solar cells under various environment in space can be predicted through the proposed simulation.