基于短路电流和扰动观察的光伏最大功率跟踪

Improved maximum power point tracking algorithm for photovoltaic generation based on combination of short circuit current with perturbation and observation

在光伏最大功率跟踪(maximum power point tracking,MPPT)系统中,针对传统的扰动观察法(perturbation and observation,P&O)难以同时满足跟踪速度和精度要求的问题,在原有的短路电流法的基础上,引入一种改进的扰动观察法,该算法不仅能够消除最大功率点附近的震荡,而且还能有效地提高响应速度。利用MATLAB/Simulink平台进行仿真,实验结果表明了算法的有效性。

In the photovoltaic maximum power point tracking （MPPT） system,the conventional perturbation and observation（P＆O） method is difficult to meet the requirements of tracking speed as well as accuracy.On the basis of existing short circuit current method,an improved perturbation and observation（P＆O） method was introduced in this paper.The new algorithm can not only eliminate the oscillation around the MPP,but also raise the speed of dynamic response.The results on MATLAB/Simulink platform show its effectiveness.