Design and Performance Evaluation of a Hybrid Active Power Filter Controller

Leopold Herman (), Klemen Knez and Boštjan Blažič
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Leopold Herman: Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
Klemen Knez: Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
Boštjan Blažič: Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia

Energies, 2024, vol. 17, issue 11, 1-31

Abstract: This paper introduces a novel hybrid filter topology that combines passive and active components to enhance harmonic filtering and resonance damping in electrical power systems. The design integrates a three-phase two-level voltage-source converter with a double-tuned passive filter in parallel, significantly reducing the power rating and operational costs while maintaining good harmonic filtering performance and reactive current compensation. Double-tuned passive filters, compared to single-tuned ones, offer improved harmonic attenuation at multiple frequencies, enhancing overall system efficiency. Moreover, when used with the proposed hybrid filter topology, the double-tuned version allows for even lower dimensions of the active part, thereby further reducing system cost. A state-feedback controller is designed to enhance the performance of the hybrid filter, proving particularly effective in environments with complex impedance conditions. This paper also examines the impact of variations in passive component parameters, demonstrating the design’s robustness against potential deviations expected over the operational lifespan. The results indicate that the hybrid filter effectively mitigates harmonics and maintains operational stability under various transient conditions, as confirmed by analytical and simulation studies on a real industrial network model. These findings underline the hybrid filter’s potential to significantly improve power quality in modern electrical networks.

Keywords: hybrid active power filters; harmonic filtering; resonance damping; state-feedback control; power quality improvement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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