A FUZZY LOGIC CONTROLLED DC-DC CONVERTER FOR AN ELECTROLYZER APPLICATION WITH A VOLTAGE DOUBLER

K.Shanthi, U. Rajesh, A. Mallikarjuna Prasad

Abstract: This paper develops a fuzzy logic controlled dc-dc converter for an electrolyzer application with a voltage doubler. In general day by day usage of power is increasing rapidly but the available resources are exhausting in the near future. Hence we are going for the renewable energy system (RES). It converts the energy into heat or electricity. Electrolyzer is a part of a renewable energy system which converters source power available into hydrogen for fuel cell. But electrolyzer lacks the ability to control the power over rapid changes in input and load , hence a power conditioning system is required to connect the electrolyzer to a system dc bus . Usually a dc-dc converter is used in the most of application .This project deals with the comparison of three soft switched dc-dc converter configurations for an electrolyzer and design of two stage (ZVT boost followed by LCL series resonant converter) with fuzzy logic control. The proposed model has a Zero Voltage switching(ZVS) technique which maintain the soft switching for complete load range. This proposed model is developed and analyzed using MATLAB/Simulink Software and the simulation results obtained justify the accuracy of proposed control technique.

Keywords: DC-DC converter, electrolyzer, fuzzy logic controller PI controller, SRC, ZVS, ZVT

DOI: https://doi.org/10.15623/ijret.2014.0324002