Finite Impulse Response Filter–Based Active Power Filter for Harmonic Reduction in a 33 KV Power Line

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@article{1722522,
      author = {Ene P. C., Anyanwogor I. G., Onwuha U. H.},
      title = {Finite Impulse Response Filter–Based Active Power Filter for Harmonic Reduction in a 33 KV Power Line},
      journal = {Iconic Research And Engineering Journals},
      year = {2026},
      volume = {10},
      number = {2},
      pages = {3737-3744},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1722522.pdf},
      abstract = {This paper presents the design and implemen-tation of a finite impulse response (FIR) fil-ter–based shunt active power filter for har-monic reduction in a 33 kV distribution pow-er line supplying nonlinear industrial loads. The increasing use of power electronic–based equipment in medium-voltage networks in-troduces significant harmonic distortion, lead-ing to poor power quality and non-compliance with established standards. To address this challenge, an FIR filter–based control strategy is proposed for accurate har-monic extraction and reference current gener-ation in an active power filtering system. A detailed model of a practical 33 kV distribution network was developed in the MATLAB/Simulink environment, incorporating nonlinear load characteristics representative of industrial applications. The FIR filter was designed to suppress the fundamental frequency component and selectively ex-tract harmonic currents, which were used to generate compensating current references for a voltage source inverter–based shunt active power filter. The system performance was evaluated under both uncompensated and compensated operating conditions using time-domain and frequency-domain analyses. Simulation results demonstrate that the pro-posed FIR-based active power filter effective-ly mitigates harmonics and improves overall power quality. The source current total harmonic distortion was reduced from 17.77% in the uncompensated system to 0.87% after compensation, achieving full compliance with IEEE 519 harmonic limits. In addition, significant improvements in current wave-form quality and power factor were observed. The results confirm that FIR filter–based active power filtering provides a stable, accurate, and robust solution for harmonic mitigation in medium-voltage distribution systems.},
      keywords = {Finite impulse response filter, Shunt active power filter, Harmonic mitigation, Power quality improvement, Frequency response.},
      month = {August},
      doi = {https://doi.org/10.64388/IREV10I2-1722522}
  }