A fuzzy controller for maximum power point tracking in grid-connected photovoltaic power generation system

A fuzzy control for maximum power point tracking (MPPT) is proposed based on the analysis on the relationship between the output power form the PV panel and the duty-cycle ratio of the front Boost converter in detail. Both perfect MPP accuracy and tracking speed are achieved with a self-adapting duty cycle ratio as a result. And simulated and experimental results with a two stage grid connected PV power generation system are given to verify the fuzzy MPPT proposed.