Modelling And Simulation Of DCDC Converter And Fuzzy-logic Based Controller Design To Stabilize Current Of PV Powered EVCS By MATLAB

Diesel,hydro Electric vehicles(EVs)are rapidly advancing,which raises the demand for power,adding to the strain on the public grid,increasing load fluctuations such as harmonic transient,voltage,current,and frequency fluctuation,and different technical challenges,etc.,and preventing EVs from being widely adopted.A smart charging station for EVs can accommodate DC rapid charging with the least amount of strain on the power system.The Electric Vehicle Charging Station(EVCS)is operated in a way that BESS and bidirectional MOSFET Buck-Boost converter used to ensures stable voltage 48VDC and current at DC link bus irrespective of weather condition(sunny,cloudy and rainy)for smart charging of EV batteries.Bidirectional operation is controlled via ideal switch for source PV(Photovoltaic Cell)connection and isolation.The EV battery voltage is relatively low when the EV begins charging.Both the battery lifetime and the charger lifespan shorten if the charging current is not constant.The process enters a constant voltage phase with the intention of preventing the battery from overcharging when the battery is almost fully charged.In this paper,we present a control strategy for a smart battery charger.For mathematical modeling,the current control strategy incorporates a PI controller,a fuzzy logic controller,and a DC/DC bidirectional buck-boost converter.Simulink used to simulate and implement the control.Generally,the battery technology and charge state determine the control strategy for the DC/DC converter(SOC).