A Comprehensive Study of Power Quality Improvement Techniques in Smart Grids with Renewable Energy Systems

The power quality problems are very important now-a-days in modern power electrification. As the transition to smart grids progresses in traditional electrical power grids, power quality issues are becoming increasingly significant. This paper presents a review of power quality improvement techniques often used in micro-grids. The most recent distributed flexible AC transmission system (D-FACTS) devices-based soft computing techniques are reviewed. The power quality issues that arise with the penetration of renewable energy sources are thoroughly analyzed, along with power quality (PQ) mitigation strategies including several D-FACTS devices and control algorithms such as artificially intelligence-based control algorithms and meta-heuristic optimization methods. For the benefit of engineers and academicians working in this field of study, 25 research publications have been carefully evaluated and organized for rapid reference.