改进黄金分割法在光伏发电MPPT中的应用

Improved golden section search application in maximum power point tracking of photovoltaic power generation

在光伏发电系统中需要对光伏电池的最大功率点进行跟踪来提高系统的输出功率。以光伏电池输出非线性特性为切入点展开研究,分析了常规算法的优缺点,针对其最大功率点跟踪(MPPT)动态和稳态性能不佳等问题,提出了将改进黄金分割法(IGSS)应用于光伏发电系统中。在Matlab/Simulink下进行了建模和仿真,仿真结果表明该方法能够迅速准确地跟踪光伏电池的最大功率点,防止算法跟踪方向误判情况的发生,表现出良好的动态和稳态特性,证实了该算法的正确性和有效性。

The output power of the photovoltaic system was increased by tracking of the maximum power point. The output nonlinear characteristics were taken as the starting point of research. The advantages and disadvantages of the conventional algorithms were analyzed. The problems, such as poor dynamic and steady-state performance of the maximum power point tracking （MPPT）, were considered. The improved golden section search （IGSS） was applied to the photovoltaic power generation system. After modeling and simulation in Matlab/Simulink, the results indicate that quickly and accurately tracking the maximum power point of photovoltaic cells can be achieved, and the occurrence of the algorithm to track the direction of misjudgment of the situation can be prevented. Good dynamic and steady state characteristics were put up. The correctness and validity of the algorithm were confirmed.