The Transactions of the Korean Institute of Electrical Engineers A (대한전기학회논문지:전력기술부문A)

The Korean Institute of Electrical Engineers (대한전기학회)
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The Protective Relaying Scheme of Power Transformer Using Wavelet Based Neural Networks

웨이브렛 변환을 바탕으로 한 신경회로망을 이용한 전력용 변압기 보호 계전기법

  • 권기백 (대덕대학 전기전자계열) ;
  • 서희석 (두원공대 자동화시스템과) ;
  • 윤석무 (대덕대학 전기전자계열) ;
  • 신명철 (성균관대 전기전자 및 컴퓨터 공학부)
  • Published : 2002.03.01
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Abstract

This paper presents a new method for the protective relaying scheme in power transformer using wavelet based neural networks. This approach is as fellows. After approximation and detail information is extracted by daub wavelet transform from differential current of power transformer, the former is used for obtaining the rate of differential currents and restrain currents, the latter used as the input of artificial neural networks to avoid the Hiss-operation in over-exciting state and magnetizing inrush state of power transformer. The simulation of EMTP with respect to different faults, inrush conditions and over-exciting conditions in power transformer have been conducted, and the results preyed that the proposed method is able to discriminate magnetizing inrush states, over-exciting stales and internal faults.

Keywords

References

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