Enhanced Active Power Filter Efficiency Using SRF-Based Control Strategy

Abstract

This paper proposes an enhanced current control strategy for improving the performance of active power filters using Synchronous Reference Frame theory. The proposed technique enables the active power filters to provide precise harmonic compensation and effective reactive power mitigation, thereby improving overall power quality in grid-connected systems with nonlinear loads. Suppression of harmonic components in the line current remains a critical challenge in such systems. The synchronous reference frame based control strategy accurately detects and compensates for harmonic currents, ensuring balanced and nearly sinusoidal source currents with minimal total harmonic distortion. Furthermore, the approach facilitates efficient regulation of both active and reactive power while maintaining stable system operation. Simulation results demonstrate that the synchronous reference frame based active power filter significantly reduces total harmonic distortion, enhances dynamic response, and restores supply current quality, confirming the superiority of the proposed technique over conventional control strategies.