Intelligent hybrid control of a five-level shunt active power filter for power quality enhancement in renewable-rich power systems

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Article ID: 774
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DOI:

https://doi.org/10.18686/cest774

Keywords:

shunt active power filter; power quality; renewable-rich power systems; adaptive hysteresis control; fuzzy logic control; space vector PWM; harmonic mitigation

Abstract

The increasing penetration of renewable energy sources and power electronic converters in modern distribution networks has introduced significant harmonic distortion and power-quality challenges, particularly in converter-dominated systems. These distortions degrade the system efficiency, reduce the equipment lifespan, and compromise the stability of sensitive loads. This study proposes an intelligent hybrid control strategy for a five-level shunt active power filter (SAPF) to enhance the power quality under nonlinear load conditions. The proposed framework integrates fuzzy logic-based DC-link voltage regulation, adaptive hysteresis current control with quasi-constant switching frequency, and space vector pulse width modulation (SVPWM) for optimized switching vector generation. The control algorithm was implemented on a digital signal processor (DSP), specifically the Texas Instruments TMS320F28335, and validated through both MATLAB/Simulink simulations and real-time experiments. The results demonstrate that the total harmonic distortion (THDi) of the source current was reduced from 18.67% to 5.04%, achieving compliance with the IEEE Std. 519. In addition, the proposed method exhibits a fast dynamic response, stable DC-link voltage regulation, and reduced switching frequency variation. Comparative evaluation confirms that the hybrid control approach outperforms the conventional proportional–integral and fixed-band hysteresis controllers in terms of harmonic mitigation and system stability. These findings highlight the effectiveness and practical applicability of the proposed SAPF in renewable-rich, converter-dominated power systems.

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Published

2026-05-20

How to Cite

Chaithanakulwat, A., Savangboon, T., Thungsuk, N., Tanaram, T., & Boontua, S. (2026). Intelligent hybrid control of a five-level shunt active power filter for power quality enhancement in renewable-rich power systems. Clean Energy Science and Technology, 4(3). https://doi.org/10.18686/cest774

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Vol. 4 No. 3 (2026): In progress

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Article

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Copyright (c) 2026 Akharakit Chaithanakulwat, Teeeawut Savangboon, Nuttee Thungsuk, Thaweesak Tanaram, Sakdawut Boontua

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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