基于模糊理论的光伏发电最大功率点跟踪控制策略研究

Control Strategy of Photovoltaic Maximum Power Point Tracking Based on the Theory of fuzzy

介绍了光伏电池的特性,最大功率点跟踪原理和Boost变换电路,提出了一种基于模糊逻辑控制的最大功率点控制策略,即将光伏电池和Boost电路作为一个整体,通过检测负载功率的变化,来调整控制开关占空比,简化了系统。仿真结果表明,当外部环境发生变化的时候,系统能够迅速跟踪此变化,使系统始终工作在最大功率点附近,并具有较好的稳定性。

The characteristics of photovoltaic power syetem, the mechanism of Maximum Power Point Tracking（MPPT） and boost converter are introduced. A fuzzy control MPPT system is presented. It takes PV module and boost converter as a whole and directly control the duty cycle of the boost converter according to the load power change. It is simpler than uesd in the past. The expermental results show the proposed system can track the MPP quickly,exactly and steadily.