Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1999.07c
- /
- Pages.1139-1141
- /
- 1999
A Study on a Percentage Current Differential Relaying Algorithm for EHV Bus Protection Using a Compensating Algorithm
보상 알고리즘을 이용한 초고압 계통의 모선보호용 비율 전류차동 계전방식에 관한 연구
-
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.)
-
강용철
(전북대학교 전기전자회로합성연구소)
;
-
윤재성
(전북대학교 전자정보공학부)
;
- 김동용 (전북대학교 전기전자회로합성연구소) ;
-
박종근
(서울대학교 전기공학부)
;
-
문승일
(서울대학교 전기공학부)
- Published : 1999.07.19
Abstract
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.
Keywords