Advancing Power Quality: A Multilevel Inverter-Based Shunt Hybrid Active Filter for Optimal Performance in Distribution Systems

Abstract

This paper presents an advanced solution designed to enhance power quality in distribution systems by implementing a Three-Phase Three-Level Shunt Hybrid Active Filter (SHAF) alongside a Multilevel Inverter. The SHAF utilizes a Three-Phase Three-Level Neutral Point Clamped Voltage Source Inverter (TPTL NPC VSI) to actively mitigate harmonics. The paper conducts a thorough performance analysis, meticulously evaluating the impact of both active and passive parameters on power quality improvement. The integration of TPTL NPC inverter technology not only reduces switch ratings but also enhances harmonic compensation. Further improvement to the SHAF is achieved through the incorporation of various passive filters, enabling a comprehensive assessment of its performance. The effectiveness of the proposed system is validated through simulation results in MATLAB/Simulink. Comparative evaluations against traditional shunt passive filters, including Single Tuned, Double Tuned, High Pass, C-type High Pass, and a three-phase two-level shunt active filter with diverse passive filters, reveal a substantial improvement of more than 50% compared to two-level active filters and more than a sixteen-fold enhancement compared to shunt passive filters.