Maximum power point tracking of photovoltaic system using feedback fuzzy system

This paper presents a novel intelligent method to track the voltage corresponding to maximum power point of a photovoltaic system. Here, the solar model is tested under variable temperature & irradiance conditions using Fuzzy logic & compare it with conventional methods. The fuzzy control used in the system uses a change in power (error) and rate of change in power (Change in error) as the inputs to get the optimum reference voltage and optimum duty cycle to track the maximum operating point. This method assures fast tracking of a maximum power point with a high accuracy and the results is verified by using Simulink model in Matlab. The system mainly consists of a photovoltaic panel, boost converter and fuzzy controller.