A Fuzzy Logic Controlled Multi input Direct Current to Direct Current Converter for Parallel Connected Sources

Abstract

This paper presents an efficient topology and fuzzy control strategy for hybrid system which utilizes multiple type of power sources such as photovoltaic systems, rechargeable batteries and fuel cells. The proposed topology works only with four switching elements controlled by fuzzy controller for simultaneously performing multiple tasks such as charging the battery, supplying the load and using the rechargeable battery in case of primary source are unavailable or fails to supply required amount of power. Furthermore the system is capable of tracking the maximum power point for PV panel to extract maximum power from it and also regulating the output voltage. The fuzzy controller is opted for the controlling the switching of transistors because it  reduces the complexity involved with traditional PID controllers with improved overall performance. Finally, the performance of the proposed converter and its control are veriï¬ed by simulating it on Simulink environment with different operational conditions and the simulation results validates the effectiveness of proposed system.