Design and Control of Solar PV Based Charging Station for Electric Vehicle

Abstract

In this paper, a solar photovoltaic-battery based isolated and grid connected system for electric vehicle's is proposed. The configuration of control of bidirectional buck-boost converter is proposed for charging (buck) and discharging (boost) the battery system. Due to solar energy sources irregular nature and variations in load demand, system mostly depend on control methods, to overcome with DC link voltage variations and power stability. Sliding mode controller based on washout filter is applied because it's good strength for unexpected change of energy resources and loads. This system includes for isolated system is a solar photovoltaic array basis on MPPT from PV, boost converter to maximize power from the PV. A bidirectional DCDC buck-boost converter is proposed being charging battery in buck mode and discharging battery in boost mode, DC loads and for the grid connected system includes a solar photovoltaic array basis on MPPT from PV, boost converter to maximize power from the PV. A bidirectional DC-DC buck-boost converter is proposed being charging battery in buck mode and discharging battery in boost mode, a bidirectional AC-DC converter. Incremental conductance (IC) implemented to obtain maximum power from photovoltaic array. In this paper study of comparison between PI (proportional-plus integral) method and sliding mode controller based on washout filter is also simulated and verified that SMC gives a superior reaction on the transients in cases of variable solar irradiation or the consumption of the loads is changing and Sliding mode control based on washout filter provides better results in compared with PI Control on voltage overshoot and voltage undershoot, in the MATLAB using Simulink and the Sim Power System toolbox.