Control of a Single-Phase Unified Power Conditionner for Power Quality Enhancement : Experimental Validation

Abstract

This paper presents the experimental validation of a single-phase Unified Power Quality Conditioner (UPQC) designed to mitigate common power quality issues in low-voltage distribution networks. The system integrates series and shunt active filters to simultaneously compensate for voltage disturbances, suppress harmonic currents, and provide reactive power compensation. A detailed system model is developed to support the control design, enabling effective performance in both transient and steady-state conditions. The implemented control method prioritizes robustness against grid perturbations and nonlinear load variations. Experimental tests, conducted on a hardware prototype under various load and grid conditions, confirm the UPQC’s capability to restore voltage profiles, significantly reduce total harmonic distortion (THD), and maintain stable reactive power compensation. The results validate the practical feasibility and efficiency of the proposed single-phase UPQC solution for enhancing power quality in single-phase distribution systems.