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Dynamic voltage restorer with an improved strategy to voltage sag compensation and energy self-recovery
College of Electrical and Information Engineering, Hunan University, Changsha, China.
College of Electrical and Information Engineering, Hunan University, Changsha, China.
School of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
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2019 (English)In: CPSS Transactions on Power Electronics and Applications, ISSN 2475-742X, Vol. 4, no 3, p. 219-229Article in journal (Refereed) Published
Abstract [en]

In this paper, an improved control scheme is proposed to improve the voltage quality of sensitive loads using dynamic voltage restorer. The existing control strategies either put emphasis on the optimal control during steady operation stage of compensation or correct the phase angle jump in the initial stage of compensation. In current researches, the impact of phase jump characteristic of voltage sag on the load side after voltage sag recoveries is widely ignored, further, there are still drawbacks in existing energy self-recovery strategies of DVR. Therefore, to improve the overall voltage compensation time while correcting the phase jump and accelerate the energy recovery of dc link side, this paper aims to 1) Propose the strategies to minimum active power consumption during voltage compensation stage and maximum active power absorption during energy self-recovery stage. 2) Deliver smooth transition in dynamic process to ensure the flexible switching between two stages. Theoretical analysis of proposed strategy is been validated through simulation and experimental results.

Place, publisher, year, edition, pages
IEEE, 2019. Vol. 4, no 3, p. 219-229
Keywords [en]
Dynamic voltage restorer, phase jump, self-recovery, smooth transition, voltage sag
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-77105DOI: 10.24295/CPSSTPEA.2019.00021OAI: oai:DiVA.org:ltu-77105DiVA, id: diva2:1376179
Available from: 2019-12-09 Created: 2019-12-09 Last updated: 2019-12-09Bibliographically approved

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