Design and Implementation of a Solar Powered Multi-Port EV Charging Station Using PWMBased PI Control

Electrical and Electronics Engineering

This paper presents an optimized control strategy for a multi-port electric vehicle (EV) charging station designed to provide priority fast charging for emergency vehicles such as ambulances and police vehicles. The proposed system employs a standalone solar photovoltaic (PV) source integrated with bidirectional DC–DC converters to supply power to multiple EV charging ports. A PWM-based PI charging controller is implemented within a MATLAB function block to regulate the converter duty cycle and ensure smooth charging operation. The controller dynamically adjusts PWM pulse widths based on different charging conditions, enabling multiple charging modes including normal charging, slow charging, fast charging, and reverse charging. A detailed MATLAB/Simulink model of the proposed system is developed to analyse the charging behaviour under various operating scenarios. Simulation results demonstrate that the proposed control strategy effectively optimizes power distribution among the charging ports, improves charging stability, and ensures reliable priority fast charging for emergency vehicles while maintaining efficient utilization of available renewable energy resources.

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