대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1999년도 하계학술대회 논문집 C
- /
- Pages.1139-1141
- /
- 1999
보상 알고리즘을 이용한 초고압 계통의 모선보호용 비율 전류차동 계전방식에 관한 연구
A Study on a Percentage Current Differential Relaying Algorithm for EHV Bus Protection Using a Compensating Algorithm
- 강용철 (전북대학교 전기전자회로합성연구소) ;
- 윤재성 (전북대학교 전자정보공학부) ;
- 김동용 (전북대학교 전기전자회로합성연구소) ;
- 박종근 (서울대학교 전기공학부) ;
- 문승일 (서울대학교 전기공학부)
- Kang, Yong-Cheol (Chonbuk Nat'l Univ. ESCRI) ;
- Yun, Jae-Sung (Chonbuk Nat'l Univ.) ;
- Kim, Dong-Yong (Chonbuk Nat'l Univ. ESCRI) ;
- Park, Jong-Keun (Seoul Nat'l Univ.) ;
- Moon, Seung-Ill (Seoul Nat'l Univ.)
- 발행 : 1999.07.19
초록
A variable percentage current differential relaying algorithm is widely used for bus protection. However, it may maloperate in case of high-impedance internal faults and external faults with CT saturation and thus additional method to cope with CT saturation is necessary. This paper proposes a percentage current differential relaying algorithm for bus protection using a compensating algorithm of secondary current of CTs. As the proposed method compensates the distorted secondary currents of CTs it can improves the sensitivity of relays in a large current region and does not need any additional method for CT saturation.
키워드