光照不均匀情况下光伏组件仿真模型的研究

Study on Simulation Model of PV Module under Non-uniform Insolation

当光伏组件或者光伏阵列中受到不均匀的太阳光照时,输出的伏安特性曲线呈阶梯状,而相应的功率电压曲线含有多个局域峰值,则现有的单体光伏电池数学模型和单峰最大功率跟踪算法都不再适用,重点研究和建立了适用于光照不均匀情况下的光伏组件数学模型,再通过MATLAB语言建立了光伏组件的MATLAB计算仿真模型。并在该模型的基础上成功地对多峰最大功率跟踪算法——二步最大功率跟踪算法进行仿真。

When PV module or PV array are under non-uniform insolation, the output voltage-current curve is in ladder shape, and the output voltage-power curve contains multi-local maximum points. The traditional MPPT algorithm and I-V characteristic do not work in this condition. Therefore, a simulation model of PV module which could work well under non-uniform insolation was proposed, and the corresponding computer simulation model was built in MATLAB. Finally, based on the simulation model, an algorithm called Two Stage Maximum Power Point Tracking algorithm was simulated in the last section successfully .