Instant voltage compensator based on a three-leg converter
SCIE
SCOPUS
- Title
- Instant voltage compensator based on a three-leg converter
- Authors
- Kwon, JM; Kim, KT; Kwon, BH
- Date Issued
- 2013-09
- Publisher
- IET
- Abstract
- This study proposes an instant voltage compensator (IVC)-based on a three-leg converter. It provides single ac-ac power conversion without large energy storage elements, so the size and cost are reduced. It operates as a boost converter when the line voltage is lower than the rated output voltage and as a buck converter when the line voltage is higher than the rated output voltage. Only one leg among the three legs is switched at a high frequency, whereas the other legs are switched at the line frequency. Therefore the power conversion efficiency is higher than that of a conventional IVC where all of the legs are controlled by a high switching frequency. The output voltage is regulated faster using a weighted-error proportional and integral controller. Experimental results are obtained with a 3 kW prototype to verify that the proposed IVC quickly compensates for the voltage sag and swell of the line voltage.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27342
- DOI
- 10.1049/IET-PEL.2012.0325
- ISSN
- 1755-4535
- Article Type
- Article
- Citation
- IET POWER ELECTRONICS, vol. 6, no. 8, page. 1618 - 1625, 2013-09
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