Solar Powered Electric Vehicle Charging Station with Fuzzy Logic Controller

Abstract

This paper proposes a novel architecture for plug in electric vehicles (PEVs) DC charging station, through the use of a grid tied Fuzzy logic-controlled Vienna converter powered from PV units also to save grid power during day light. Proposed topology is a combination of grid power and PV units' power merged together so that renewable energy sources are utilized. In conventional chargers, usually large switching devices are used in which switch mode technique is used or transformers are used to first step down voltage and then rectify it. Each switching device adds its noise & losses in system. Cost of production increases due to these switching devices. Vienna rectifier is one of the best in this field consists of limited number of switching devices. Vienna produces bi polar output voltage which can serve two electrical loads at a time. A PV units have been merged with Vienna rectifier in order to design composite system. To get maximum power from PV, an algorithm of Maximum Power Point Tracking (MPPT) has been used. A Vienna converter converts this combines power according to the vehicle demand. The fuzzy logic based solution enables fast charging for (PEVs) concentrating into a central grid tied converter. Simulations are validate the charging station architecture and performance. Simulation results show that output power is stable and provide fast charging with minimum THD of less than 1 %.