Design and Simulation of Non-Linear Control System fed Bidirectional Converter for Solar Energy Controlled Battery Charging Applications

Abstract: Due to continuous variations of charging level batteries, connected loads can be different in electric vehicle (EV) charging stations. The linear controllers such as PI, PD, and PID does not provide smooth and regulated response in case of EV charging applications as well as power electronics collaboration. Sometimes load changes in different critical situations and EV charging stations come in instability region. Considering the reasons, this research work discusses on implementation of non-linear controllers for EV battery charging applications. This paper shows and describes the performance of non-linear Fuzzy-Logic Controller (FLC) and Sliding Mode Controller (SMC) for EV charging applications. The Fuzzy-Logic controller and slide mode controller has been developed for Split-Pi converter- based battery charging scheme, and the complete control system has been analyzed and validated by simulation study. Performances have been investigated in detail throughout checking different characteristics of both controllers. Split-Pi converter is a recently invented DC-DC converter which has great potential in the power electronics fields. Because it has less components and lower switching losses. The closed-loop operation of this converter topology has been discussed with simulation results.

Keywords: Fuzzy Logic Controller, Sliding Mode Controller, EV Battery, Charging Station, Split-Pi DC-DC Converter, Solar PV Panel.