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<p>The shift toward renewable energy necessitates decentralized power generation, reduced transmission losses, and improved sustainability. Hybrid Renewable Energy Systems (HRES) integrating Photovoltaic (PV) systems, Wind Turbines (WT), and Energy Storage Systems (ESS) face significant power quality challenges due to harmonic distortions from non-linear loads. This study proposes a dual-mode Power Quality (PQ) enhancement strategy in a hybrid microgrid using a PV-based voltage source converter (PV-VSC) and a hybrid active power filter (HAPF) with a split DC-bus configuration. During non-sunshine hours, the PV-VSC operates as a PV-HAPF to utilize its dormant rating for harmonic mitigation, while during sunshine hours, a dedicated HAPF ensures PQ when the PV-VSC functions as an inverter. Additionally, the proposed method includes a configuration with split DC buses, one dedicated to the PV system and the other to the WT and ESS, which enhances power management and mitigates challenges posed by dispersed energy sources. MATLAB/Simulink simulations demonstrate that the proposed method reduces source current total harmonic distortion (THD) from 30.00% uncompensated to 3.58% with PV-HAPF and 3.93% with HAPF, meeting IEEE 519 standards. The approach offers continuous PQ improvement, utilization of PV-VSC, and adaptability for both standalone and grid-connected HRES.</p>

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Integrated Harmonic Mitigation and Power Quality Enhancement in Hybrid Micro-Grid with Split DC Buses

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Akash V. Barva,
  • Siddharth Joshi

摘要

The shift toward renewable energy necessitates decentralized power generation, reduced transmission losses, and improved sustainability. Hybrid Renewable Energy Systems (HRES) integrating Photovoltaic (PV) systems, Wind Turbines (WT), and Energy Storage Systems (ESS) face significant power quality challenges due to harmonic distortions from non-linear loads. This study proposes a dual-mode Power Quality (PQ) enhancement strategy in a hybrid microgrid using a PV-based voltage source converter (PV-VSC) and a hybrid active power filter (HAPF) with a split DC-bus configuration. During non-sunshine hours, the PV-VSC operates as a PV-HAPF to utilize its dormant rating for harmonic mitigation, while during sunshine hours, a dedicated HAPF ensures PQ when the PV-VSC functions as an inverter. Additionally, the proposed method includes a configuration with split DC buses, one dedicated to the PV system and the other to the WT and ESS, which enhances power management and mitigates challenges posed by dispersed energy sources. MATLAB/Simulink simulations demonstrate that the proposed method reduces source current total harmonic distortion (THD) from 30.00% uncompensated to 3.58% with PV-HAPF and 3.93% with HAPF, meeting IEEE 519 standards. The approach offers continuous PQ improvement, utilization of PV-VSC, and adaptability for both standalone and grid-connected HRES.