光伏系统典型MPPT控制方法比较研究

太阳能光伏组件是非稳定电源,为有效利用太阳能,必须对其进行最大功率点跟踪（MPPT）。论文分析了光伏发电MPPT原理,提出一种基于占空比扰动的MPPT控制方法,在Matlab中建立扰动观察法和增量电导法仿真模型,仿真结果显示两者均能实现最大功率点跟踪,增量电导法性能要明显优于扰动观察法,但其硬件要求高。研究为光伏发电MPPT算法选择提供了参考,当系统精度要求高,硬件能够满足控制要求,可以选择增量电导法,否则应考虑扰动观察法。

A Comparative Studyonthe Typical MPPT Control Method for Photovoltaic System

Because of solar ceils were non-stabilized power,in order to effectively use of solar energy,it need for maximum power point tracking （MPPT）. In this paper,the principle of photovoltaic generation MPPT analyzed,and a MPPT control method based on the duty cycle disturbances was proposed. Perturbation and observation（P＆O）and incremental conductance（INC）simulation circuit were built in Matlab. Simulation results show that both can achieve maximum power point tracking,INC performance to be better than the P＆O. When high accuracy requirements of the system hardware to meet the control requirements,you can select INC,otherwise it should be considered the P＆O.