Dynamic Voltage Restorer using SRF Controller to mitigate Sag/Swell in Industrial Drive Applications

Industrial electricity users steadily expressed concern about energy efficiency in recent years. Modern enterprises use sensitive electronic power devices, control systems and nonlinear charges to improve energy efficiency and productivity as part of automated processes. Due to the greater use in industrial systems of advanced and sensitive electronic equipment, voltage disruptions have become the most important concern for power quality. A new device that defends sensitive industrial loads against voltage slopes / swells and other stress disruptions is the Dynamic Voltage Restorer (DVR). DVR configurations and control schemes are determined by the specification and characteristics of the load to be protected. Due to the inherent inertia and the ability of induction engines to withstand shorter-term, shallower swells and their phase-angle-hop resistance, induction motor cargo industries need a completely new approach to designing and operating a suitable DVR. This paper proposes a DVR with a quick response, simple and effective controller to satisfy the voltage repair requirements for induction drive applications.