The global transition to renewable energy sources (RES) such as solar and wind is essential for combating climate change. However, integrating variable renewable energy (VRE) into existing power grids presents several power quality (PQ) and stability challenges due to their intermittent and unpredictable nature. This paper reviews key PQ issues, including voltage fluctuations, harmonic distortions, frequency instability, reactive power limitations, flicker, and power imbalances. It also explores the limitations of traditional grid infrastructure in managing high levels of VRE and the need for modernization. Solutions such as advanced forecasting, energy storage systems, and smart inverters are discussed. Additionally, future trends are highlighted, including the growth of electric vehicles (EVs), green hydrogen, grid interconnectivity, and emerging technologies like solid-state batteries. The paper concludes that strategic planning, technological innovation, and international cooperation are critical to ensuring reliable and efficient renewable energy integration into modern power systems.
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Pithwa et al. (Wed,) studied this question.