Fuzzy logic based PIDF controller for PV array fed multilevel converter

In this paper, fuzzy logic based proportional integral derivative controller with filter (PIDF) is proposed for photovoltaic array fed multilevel converter. Initially, the test is carried out using conventional PIDF controller and it yields poor transient response due to the improper tuning of its gain values. Secondly, a fuzzy-tuned PIDF controller has been designed and implemented. The fuzzy controller abstain the gain of the controller based on the operating point of the solar array. Different parameters of the PIDF controller such as faster transient response, less settling time, and lower peak overshoot has been studied under partial shading condition of the photovoltaic array. The comparison is made with the conventional PIDF controller with different gains of fuzzy based PIDF controller. The results indicate that the fuzzy based PIDF controller is suitable for PV array fed multilevel converter.