- 과도성분과 상태도를 이용한 거리 계전기의 향상된 Zone 3 알고리즘
- ㆍ 저자명
- 허정용,김철환
- ㆍ 간행물명
- 전기학회논문지. The transactions of the Korean Institute of Electrical Engineers. A / A, 전력기술부문
- ㆍ 권/호정보
- 2004년|53권 3호|pp.161-167 (7 pages)
- ㆍ 발행정보
- 대한전기학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Zone 3 of the distance relay is used to provide the remote back-up protection in case of the failure of the primary protection. However, the risk lot mal-operations under stressed conditions such as heavy loading, voltage and transient instability is usually high. Zone 3 is used in combination with the derivatives of the voltage, and current, etc to prevent mal-operations. Sometimes, the impedance characteristics that restrict the tripping area of relay are used to avoid the mal-operations due to load encroachment. This paper presents a novel Zone 3 scheme based on combining the steady-state components (i.e. 60Hz) and the transient components (TCs) using a state diagram that visualizes the sequence of studies that emanate from the sequence of events. The simulation results show that the novel zone 3 distance relay elements using the proposed method operates correctly for the various events.