International Journal of Scientific Research and Engineering Development

The rapid integration of renewable energy sources such as solar photovoltaic (PV) and wind power into distribution networks has significantly transformed modern power systems. While renewable energy enhances sustainability and reduces carbon emissions, high penetration levels introduce various power quality challenges including voltage fluctuations, harmonic distortion, reverse power flow, and frequency instability. These disturbances affect system reliability, equipment performance, and consumer satisfaction. This paper presents a comprehensive study on power quality issues arising from large-scale renewable integration and proposes effective mitigation techniques. Advanced control strategies such as smart inverter-based Volt-VAR and VoltWatt control, distribution static compensators (DSTATCOM), active power filters, and energy storage systems are analyzed for improving voltage profile and harmonic performance. Simulation-based validation demonstrates that coordinated control of distributed energy resources can significantly enhance power quality and maintain network stability under high renewable penetration scenarios.

Dr.P.Jeyaprakash, Ashvitha Aarniya S, Mathumitha K, Naveena S K,"Power Quality Improvement in Distribution Networks under High Renewable Energy Penetration" International Journal of Scientific Research and Engineering Development, V9(2): Page(2114-2120) Mar-Apr 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.