基于变步长扰动观察法的MPPT仿真分析

摘要

Inordertotrackthemaximumpowerpointeffectivelyinphotovoltaicsystems,thispaper sets up the simulation model of the PV module based on MATLAB/Simulink software and analyzes the non-linear output characteristics of the PV module according to its U-I,P-I and P-U characteristic curves.The variable step disturbance observation method,based on the dynamic characteristics of the PV module,is used to track the maximum power point.Simulation results indicate that this module can rapidly and stably track the maximum power point much better than the traditional methods.%为了更好地跟踪光伏发电系统的最大功率点，在MATLAB／Simulink环境下，搭建了光伏电池阵列仿真模型，根据其输出的U－I、P－I和P－U特性曲线分析了光伏电池阵列的非线性特性。基于光伏电池的动态特性，采用一种变步长的扰动观察法来实现光伏电池阵列的最大功率点跟踪。仿真结果表明，该方法能够快速稳定准确地进行最大功率点跟踪。