Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1995.07b
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- Pages.476-478
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- 1995
A Current Compensating Algorithm with Small Iron-cored CTs
작은 변류기 사용이 가능한 전류 보상 알고리즘
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Kang, Sang-Hee
(Myong-Ji University) ;
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Kang, Yong-Cheol
(Seoul National University) ;
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Park, Jong-Keun
(Seoul National University)
- Published : 1995.07.20
Abstract
The conventional technique to deal with CT saturation is overdimensioning of the core so that CTs can carry up to 20 times the rated current without exceeding 10% ratio correction. However, this not only reduces the sensitivity of relays, but also increases the CT core size in proportion to the expected maximum fault current to avoid CT saturation. This paper presents a technique of estimating the secondary current corresponding to the CT ratio which can reduce the required CT core cross section significantly.
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