대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2004년도 추계학술대회 논문집 전력기술부문
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- Pages.217-219
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- 2004
전력용변압기보호를 위한 개선된 수치계전기법
Advanced Numerical Relaying for Power Transformer Protection
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Park, Chul-Won
(Wonju National College) ;
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Shin, Myong-Chul
(Sung Kyun Kwan University)
- 발행 : 2004.11.12
초록
The second harmonic component could be decreased by magnetizing inrush when there have been changes to the material of the iron core or its design methodology. The higher the capacitance of the high voltage status and underground distribution, the more the differential current includes the second harmonic during the occurrence of an internal fault. Therefore, the conventional second harmonic-restrained RDR needs modification. This paper describes an advanced numerical algorithm that utilizes terminal voltage, differential current harmonics, harmonic ratio, and flux-differential current slope. Based on the results of testing with WatATP99 simulation data, the proposed algorithm was proven to be faster and more reliable.
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