대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1998년도 하계학술대회 논문집 C
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- Pages.893-895
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- 1998
Adaptive보호범위를 가진 송전선로 보호용 디지털 거리계전기
Digital Distance Relay with Adaptive Protection Zone
- Jung, Chang-Ho (LGIS Electrotechnology R&D Center) ;
- Lee, Jae-Gyu (LGIS Electrotechnology R&D Center) ;
- Jung, Byung-Tae (LGIS Electrotechnology R&D Center) ;
- Ahn, Bok-Shin (LGIS Electrotechnology R&D Center)
- 발행 : 1998.07.20
초록
This paper presents the adaptive setting method of distance relay under the single line ground fault. The apparent impedance measured at the relaying point and actual impedance is different because of fault resistance and various prefault loading condition. For a resistance earth fault detection, relay setting zone is adaptively changed with measured load current and bus voltage at the relaying point to avoid maloperation.
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