光伏电池最大功率点跟踪控制方法的对比研究及改进

光伏发电系统中光伏电池的输出特性具有唯一的最大功率点(MPP),需要对光伏电池的最大功率点进行跟踪(MPPT)。文中分析了几种常见的最大功率点跟踪控制方法对比分析了它们的优缺点。针对MPPT控制方法中存在的启动特性较差、跟踪过程不稳定、精度不高等特点,采用一种改进爬山法,该法以恒定电压法作为启动特性及采用变步长进行跟踪控制,并利用Matlab/Simulink搭建了改进爬山法的MPPT控制模型,仿真结果验证该方法的有效性。

Comparative Research and Improvement of PV Maximum Power Point Tracking Control Methods

The output characteristics of photovoltaic cells in the photovohaic power generation system has a unique maximum power point（MPP）, therefore the PV maximum power point tracking （MPPT）hecomes a necessity. This paper conducted a n comparative analysis on the advantages and disadvantages of analyzes several maximum power point tracking methods commonly used. and compares their advantages and disadvantages. To address the faults such as the poor startup, unstable tacking process and low accuracy in the MPPT control method, this paper uses adopts the improved climbing method. The method, with the constant voltage method as its startup feature, uses variable step lengths for tracking control, and then builds an MPPT control model of the improved climbing method by using Matlab / Simulink. The simulation results prove effectiveness of the method.