Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2001.11b
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- Pages.118-120
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- 2001
A Distance Relaying Algorithm Using an Improved Technique for Removing DC-offset
DC-Offset 제거 기능을 향상시킨 거리계전 알고리즘
- No, Jae-Keun (Myongji University) ;
- Kang, Sang-Hee (Myongji University) ;
- Nam, Soon-Ryul (Seoul National University) ;
- Park, Jong-Keun (Seoul National University)
- Published : 2001.11.16
Abstract
This paper presents a distance relaying algorithm based on the Discrete Fourier Transform(DFT) for elimination of DC-Offset. When the DFT is applied to current signal. the real and imaginary parts of fundamental component consist of fundamental component itself and DC-Offset. The DC-Offset is calculated by four consecutive values of the imaginary components, so that the fundamental component can be accurately estimated. Performance evaluation is presented for A-phase ground faults on 154kV 80km overhead transmission line. The proposed algorithm is inspected by software simulation and hardware simulation.
Keywords