대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2008년도 추계학술대회 논문집 전력기술부문
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- Pages.9-11
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- 2008
EMTP-RV를 이용한 CT포화 모델링
EMTP-RV Modeling of CT Saturation
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Kang, Yong-Cheol
(Chonbuk National University)
;
- Choi, Jae-Sun (Chonbuk National University) ;
- Zheng, Tai-Ying (Chonbuk National University) ;
- Kang, Hae-Gweon (Chonbuk National University) ;
- Jang, Sung-Il (Chonbuk National University) ;
- Kim, Yong-Gyun (Hankook IED) ;
- Ryu, Young-Sik (Korea Power Exchange)
- 발행 : 2008.11.07
초록
A protection current transformer (CT) has been widely used for protection devices. When a fault occurs, a CT should provide the faithful reproduction of the primary fault current. However, a CT may saturates due to the magnitude of fault current, dc component primary time constant and the remanent flux of the iron core, and the secondary current of a CT is distorted. The distorted current can cause mal-operation or the operating time delay of a protection relay. This paper provides a modeling of CT saturation using EMTP-RV. The performance of the proposed CT saturation modeling was investigated under various fault conditions varying the fault distance, fault inception angle, and remanent flux of the iron core. The results indicate that the proposed EMTP-RV modeling can operate correctly, and the reasons for CT saturation are verified by EMTP-RV simulations.
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