대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
- /
- Pages.163-164
- /
- 2006
영상 전류를 이용한 변류기 개방 판단 알고리즘
Algorithm for detecting the failure of a current transformer using the zero-sequence current
-
강용철
(전북대학교)
;
-
이병은
(전북대학교)
;
- 이현웅 (전북대학교) ;
- 김유다 (전북대학교) ;
- 박준수 (전북대학교) ;
- 이미선 (전북대학교) ;
- 박지연 (전북대학교) ;
- 이보은 (전북대학교)
-
Kang, Yong-Cheol
(Chonbuk National University)
;
-
Lee, Byung-Eun
(Chonbuk National University)
;
- Lee, Hyun-Woong (Chonbuk National University) ;
- Kim, Ju-Dah (Chonbuk National University) ;
- Park, Jun-Su (Chonbuk National University) ;
- Lee, Mi-Sun (Chonbuk National University) ;
- Park, Ji-Yeoun (Chonbuk National University) ;
- Lee, Bo-Eun (Chonbuk National University)
- 발행 : 2006.07.12
초록
A current differential relay has been used for transmission line protection. The relay may maloperate in the case of a failure of the secondary circuit of a current transformer (CT) because the differential current is produced. This paper presents an algorithm to detect a failure of a CT using the zero-sequence current. If the magnitude of the zero-sequence current is the same as the magnitude of the current of the other healthy phases, a failure of a CT is detected and then the blocking signal is activated. The proposed algorithm prohibit the maloperation of a differential relay in the case of a CT failure and thus increase the security of the relay.
키워드