基于模糊自适应PI控制的光伏发电MPPT

Maximum Power Point Tracking Based on Adaptive Fuzzy-PI Control for Photovoltaic Energy Generation System

介绍了光伏发电过程中最大功率点跟踪(MPPT)原理,并简要分析了常规控制算法在最大功率跟踪控制中的优缺点,提出将模糊自适应PI控制算法应用到光伏系统最大功率点跟踪的控制中,该控制方法能快速响应外界环境的变化,获得系统最大功率点,且可以有效消除系统在最大功率点附近的振荡现象,提高系统的稳定性。仿真结果表明,该方法能使系统稳定地工作在最大功率点,并且控制精度高,能灵敏反应外界环境的变化。

This paper describes the principle of Maximum Power Point Tracking （MPPT） in the PV generation system, and briefly analyzes the advantages and disadvantages of the conventional control algorithm for MPPT. A novel adaptive fuzzy-PI control algorithm is introduced for MPPT of PV system. By using this control method, the PV system can track the maximum power point rapidly, and can eliminate the power oscillation around maximum power point effectively to improve the stability. Simulation results show that the proposed method can make the system run at the maximum power point steadily, have the high regulating accuracy, and have the ability to respond to affective changes in environment rapidly.