한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2005년도 춘계학술대회 논문집
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- Pages.127-129
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- 2005
전력계통의 사고전류 저감 설비별 특성 비교
Comparison of Fault Current Limiting Characteristics According to Facility in Power System
- Park, Hyoung-Min (Chosun University) ;
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Choi, Hyo-Sang
(Chosun University) ;
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Cho, Yong-Sun
(Chosun University) ;
- Lim, Sung-Hun (Research Center of Industrial Technology Engineering Research Institute) ;
- Hwang, Jong-Sun (Namdo University)
- 발행 : 2005.05.27
초록
We investigated the fault current limiting characteristics according to the various facilities in power system. Power systems are becoming larger and larger for meeting electric power demand. Therefore, the over-currents resulting from contingencies such as short circuits are increasing higher, which causes the ratings of circuit breakers(CBs) to increase. Upgrading or replacement of CBs is not difficult from the technical and economical point of view. Bus split is being adopted into a part of 154 kV power systems, but it has adverse effects such as overload to neighboring power systems, increased voltage fluctuation, and decreased power system stability. For 345 kV power systems, the bus split measure is not feasible and dc reactors are being suggested. The superconducting fault current limiter is a protection gear of new concept that limits fault current automatically in a few milliseconds. It can also provide the effect of CB capacity increase, relaxation of power machine criteria, enhancement in power system reliability, and flexible power system operation.