基于自适应模糊PID算法的光伏系统MPPT控制

MPPT Strategy of PV System Based on Adaptive Fuzzy PID Algorithm

为进一步提高光伏发电系统MPPT控制品质,对常规模糊跟踪算法进行了改进,提出自适应模糊PID双模控制策略,分析了控制算法的原理,并对控制系统做了设计。实验结果显示,自适应算法能迅速感知外界环境变化,快速跟踪光伏电池最大功率点,具有良好的鲁棒性,同时引入的PID控制能有效消除最大功率点附近的振荡现象,提高系统稳定性。整个双模控制实现了MPPT精确性与快速性的兼备。

To further improve the control quality of photovohaic generation MPPT systems, dual-mode adaptive fuzzy PID control strategy is proposed on the basis of conventional fuzzy tracking algorithm, the principle of control algorithm is analyzed and the control system is designed. The results show that dual-mode control algorithms can quickly sense the changes of the external environment, and track the maximum power point rapidly. At the same time, oscillation phenomenon near the MPP is eliminated effectively. The total MPPT system represents good stability, accuracy and rapidity.