阴影光照条件下光伏阵列的最大功率点跟踪方法

提出一种基于线性函数的自适应步长滞环比较法的最大功率点跟踪(MPPT)方法.首先,在阴影光照条件下,构建光伏电池的双二极管等效电路,在Matlab/Simulink仿真平台上对光伏阵列输出特性曲线进行仿真;然后,分析文中方法的工作过程,通过仿真和实验对比文中方法与扰动观测法的控制效果.结果表明:文中方法可以准确地跟踪到阴影光照条件下光伏阵列的最大功率点,提升MPPT的跟踪效果.

Maximum Power Point Tracking Method for Photovoltaic Arrays Under Partial Shading Conditions

A maximum power point tracking(MPPT)method based on linear function and self-adaptive step size hysteresis comparison method is proposed. Firstly, the double diode equivalent circuit of photovoltaic cell is established under partial shading conditions, and output characteristic curve of photovoltaic array is simulated on Matlab/Simulink simulation platform. Then, the working process of the proposed method is analyzed, and the control method in the paper is compared with the disturbance observation method by simulation and experiment. The results show that the proposed method can accurately track the maximum power point of photovoltaic array under partial shading conditions and improve the tracking effect of MPPT.