Transformerless dynamic voltage restorer

Author

Li, B.H. ; Choi, S.S. ; Vilathgamuwa, D.M.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

149

Issue

3

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

263

Lastpage

273

Abstract

The feasibility of achieving dynamic voltage restoration without the use of the injection transformer is investigated. The configuration of a proposed transformerless dynamic voltage restorer (DVR) features separate energy storage capacitors for phase-to-phase isolation, cascaded switches/inverters for the voltage boosting functions and a dynamic energy replenishing charging circuit. Comparison of the scheme with the conventional DVR is conducted in terms of voltage regulation property, power losses, reliabilities, costs and ride-through capabilities. The transformerless DVR is seen to be advantageous over the conventional DVR in many aspects. Simulation results also demonstrate the effective dynamic performance of the DVR scheme

Keywords

capacitor storage; power capacitors; power distribution control; voltage control; cascaded switches/inverters; costs; dynamic performance simulation; energy storage capacitors; phase-to-phase isolation; power losses; reliabilities; ride-through capabilities; transformerless dynamic voltage restorer; voltage boosting functions;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:20020212

Filename

1007425