대한전기학회논문지:전력기술부문A (The Transactions of the Korean Institute of Electrical Engineers A)
- 제48권7호
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- Pages.855-862
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- 1999
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- 1229-2443(pISSN)
최소자승법을 이용한 고속 거리계전 알고리즘
A High Speed Distance Relaying Algorithm Based on a Least Square Error Method
초록
A high speed digital distance relaying algorithm based on a least square error method is proposed. To obtain stable phasor values very quickly, first, a lowpass filter which has very short transient period and no overshoot is presented. Secondly, the least square error method having the data window of 3 samples is used by applying a FIR filter which removes the DC-offset component in current relaying signals. Test results show that the proposed distance relaying algorithm detects most of internal faults within a half cycle after faults in a 154[kV] overhead transmission line system.