Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1998.11a
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- Pages.220-222
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- 1998
Developed Ability of Zero-phase Overcurrent Relay by Changed setting point value
설정치 변경에 의한 영상과전류계전기의 성능개선
- Kim, N.H. (Kangwon National University) ;
- Yoon, D.S. (Kangwon National University) ;
- Chang, S.I. (Kangwon National University) ;
- Choi, J.H. (Kangwon National University)
- Published : 1998.11.28
Abstract
This paper presents a method, which develops an ability of Zero-phase Overcurrent Relay. Zero-phase current is very useful factor of Fault decision in Protect Relaying system. Actually, the setting-point value of Designed Relay, using Zero-phase current, is fixed. So in the case of deciding fault, Fixed setting-point value is not suitable for changing Load. and cause errors in Distributions system. For solving this problem, This paper proposes the Changed setting point value Algorithm, which can be adaptive for changing Distributions system using Zero-phase current r.m.s. indexes. The results of simulation under Load changing and High impedance fault show that proposed algorithm is useful for changing Distributions system and decreasing errors.
Keywords