光伏系统功率扰动改进型MPPT算法研究

根据光伏电池的特性及影响光伏电池输出功率的主要因素,在比较了常用最大功率跟踪算法的恒定电压法和功率扰动法的原理及优缺点基础上,提出了一种改进型功率扰动最大功率跟踪算法.以求克服传统算法中定步长跟踪带来的无法快速跟踪光照突变,变步长算法中突变初期的扰动过大的问题,并对其有效性进行了仿真验证,具有较强的工程实用价值.

Study on Improved Power Disturbances MPPT Control Algorithm of Photovoltaic System

The output characteristics of PV modules and the key factors controlling PV module’s power output are analyzed.An improved power disturbance based Maximum Power Point Tracking (MPPT) algorithm is given by comparing the pros and cons for the principle of constant voltage algorithm & power perturbation algorithm.This new algorithm addresses two problems of traditional algorithm,i.e.fast track mutation light and large disturbance during initial phase of variable step algorithm.The effectiveness of the new algorithm is simulated.This should be helpful for future engineering practice.