High Impedance Fault Detection using Wavelet Transform

Wavelet 변환을 이용한 고저항 지락고장 검출

  • 김현 (성균관대 대학원 전기전자 및 컴퓨터공학부) ;
  • 김철환 (성균관대 전기전자 및 컴퓨터공학부)
  • Published : 1999.12.01

Abstract

High impedance fault(HIF) is defined as fault the general overcurrent relay can not detect or interrupt. Especially when HIF occur in residential areas, energized high voltage conductor results in fire hazard, equipment damage or personal threat. This paper proposes the model of the high impedance fault in transmission line using the ZnO arrester and resistance to be implemented within EMTP. The performance of the proposed model is tested on a typical 154[kV] korean transmission line system under various fault conditions. Wavelet transform is efficient and useful for the detection of high impedance fault in power system, because it uses variable windows according to frequency. In this paper, HIF detection method using wavelet transform can distinguish HIF form similar fault like arcfurance load, capacitor bank switching and line switching.

Keywords

References

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