【摘要】 在阴影影响下,光伏阵列输出特性存在多个局部最大功率点,传统最大功率点跟踪算法不能区别真正的最大功率点。利用Matlab仿真软件对不同阵列在不同光照及温度下输出特性进行了仿真,归纳了光伏阵列在阴影下导数–电压输出特性的变化规律。研究了基于导数等效面积的最大功率点所在区间定位以及求导采样点确定方法,并在区间定位方法基础上了提出了多极值点最大功率点跟踪方法。建立基于状态方程的系统仿真模型对该文提出的算法进行了仿真验证,搭建实验平台对该文提出的最大功率点跟踪方法进行了验证。仿真与实验结果验证了所提方法的正确性。更多还原

【Abstract】 Photovoltaic(PV) array output characteristics under shadowed conditions have multi local maximum power points,but traditional maximum power point tracking(MPPT) methods cannot identify global maximum power points.This paper proposed a new global MPPT method under shadowed condition.Output characteristics of shadowed PV array under different illumination and temperature were simulated by Matlab software.The change rule of voltage-differential coefficient curve feature was summarized and equivalent area was introduced to located real maximum power point interval.On this basis,a multi-local MPPT method was developed.Simulation and experimental results were presented to validate the proposed method.更多还原