Enhancing power quality through the utilization of Dynamic Voltage Restorers in electrical distribution systems: an overview

This paper presents a comprehensive review of the dynamic voltage restorer (DVR) for enhancing power quality in electrical distribution systems. Over the last five decades, power quality issues have been on the rise. To mitigate the impact of voltage disturbances, various devices have been introduced as solutions, including the distribution static compensator (D-STATCOM), solid-state transformer (SST), uninterruptible power supply (UPS), and the dynamic voltage restorer (DVR). The DVR, known for its cost-effectiveness, stands out as a solution to address voltage disturbances such as sag/swell and harmonics. Widely applied in power distribution systems, particularly in medium and low distribution networks, the DVR plays a crucial role in voltage mitigation. This paper focuses on reviewing the integration of DVR in systems that incorporate renewable energy resources. This emphasis is vital considering the evolving landscape of the electricity sector towards renewable energy sources. The review encompasses a detailed discussion of typical components, controllers, compensation methods, and the diverse applications of DVR. The in-depth examination of DVR technology is intended to facilitate and accelerate its development and advancement in the near future.