A Review on Development in Unified Power Quality Conditioner

Abstract

Power quality issues such as voltage sags, swells, harmonics, and interruptions are significant concerns in modern electrical networks, affecting the reliability and efficiency of power supply to consumers. These issues can lead to equipment malfunction, increased downtime, and financial losses for industries. To mitigate these challenges, Unified Power Quality Conditioner (UPQC) technology has emerged as a crucial solution. UPQC is designed to address multiple power quality problems simultaneously. By integrating series and shunt active power filters, UPQC can regulate voltage, mitigate harmonics, and balance reactive power in real-time. This comprehensive approach not only improves the quality of power delivered to end-users but also enhances the stability and efficiency of the entire electrical grid. Recent advancements in UPQC technology have focused on enhancing its power structure, control systems, and application-specific adaptations. Innovations include modular designs to accommodate distributed generation (DG) systems, microgrids (MC), and other renewable energy sources. Advanced control algorithms ensure precise management of power flow, responding swiftly to dynamic changes in the grid conditions. These developments make UPQC systems versatile and adaptable, capable of meeting the specific needs of different industrial and residential applications. In this paper, a comprehensive literature review of Unified Power Quality Conditioner (UPQC) is presented, focusing on several key aspects: classification, control techniques, reduced switch configurations, and controllers utilized for UPQC operation.