Abstract
Power quality is a pressing concern and of the utmost importance for advanced and high-tech equipment in particular, whose performance relies heavily on the supply’s quality. Power quality issues like voltage sags/swells, harmonics, interruptions, etc. are defined as any deviations in current, voltage, or frequency that result in end-use equipment damage or failure. Sensitive loads like medical equipment in hospitals and health clinics, schools, prisons, etc. malfunction for the outages and interruptions, thereby causing substantial economic losses. For enhancing power quality, custom power devices (CPDs) are recommended, among which the Dynamic Voltage Restorer (DVR) is considered as the best and cost-effective solution. DVR is a power electronic-based solution to mitigate and compensate voltage sags. This paper provides a thorough discussion and comprehensive review of DVR topologies based on operations, power converters, control methods, and applications. The review compares the state-of-the-art in works of literature, and comparative study on power quality issues, the DVR principle along with its operation modes, the DVR components, the DVR topologies based on energy storage, the DVR topologies based on single-/three-phase power converters, and the DVR topologies based on control units that have different control processing stages. Furthermore, modified and improved configurations of the DVR, as well as its integration with distributed generations, are described. This work serves as a comprehensive and useful reference for those who have an interest in researching DVRs.
Highlights
Over the past few years, the number of sensitive loads such as medical equipment in hospitals and health clinics, schools, prisons, etc. has quadrupled which makes the power quality of the sensitive loads a pressing concern [1]
Dynamic Voltage Restorer (DVR) topologies, and the integration of distributed generations with DVR will serve as an extensive reference for those researchers and engineers who are working on power quality issues and voltage disturbance mitigation
Components, the DVR topologies based on energy storage, or the lack thereof are discussed in this paper
Summary
Over the past few years, the number of sensitive loads such as medical equipment in hospitals and health clinics, schools, prisons, etc. has quadrupled which makes the power quality of the sensitive loads a pressing concern [1]. Voltage swells, transients, harmonics, fluctuations, flickers, and interruptions are the essential power quality issues [3,4,5,6] They will be all explained further . These power quality issues and voltage disturbances must be averted when it comes to sensitive and critical loads. They serve as compensation and each one has a as different control method prominent role in voltage sag compensation andsystems, sensitive load protection well. Effective CPD because its cost is low, its size small, and it is capable fast to the DSTATCOM is employed correct the the installation power factor.
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