Seamless Integration of Shunt Active Power Filtering in Fast EV Chargers for Grid Ancillary Services

This paper proposes a MATLAB/Simulink-based electric vehicle (EV) charging system integrated with shunt active power filter (SAPF) functionality for improved grid power quality. The proposed Bi-Directional Sliding Mode Control (BD-SMC) technique is implemented in Simulink to achieve harmonic mitigation, stable DC link voltage, and smooth bidirectional power flow during grid-to-vehicle (G2V) and vehicle-to-grid (V2G) operations. The system effectively combines EV charging and active power filtering within a single control framework, reducing total harmonic distortion and enhancing voltage regulation. Simulation results demonstrate the system’s ability to maintain sinusoidal grid currents and stable DC-link voltage under various operating conditions, including load variation and distorted grid supply, validating the effectiveness of the proposed control strategy for real-time EV charging and grid support applications.

Key words: Electric vehicles, shunt active power filter, bi-directional sliding mode control, power quality (PQ), ancillary services, V2G, G2V