전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제57권9호
  • /
  • Pages.1522-1530
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  • 2008
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  • 1975-8359(pISSN)
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  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

웨이브릿 기법을 이용한 리커시브 실시간 고장점 표정 시스템 연구

Recursive Real Time Fault Locator with Wavelet Method

  • 이성우 (한전 전력연구원 책임연구원) ;
  • 하복남 (한전 전력연구원 수석연구원)
  • 발행 : 2008.09.01
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초록

This paper presents a discrete wavelet analysis based algorithm to address the fault impedance calculation under transient state in radial power distribution networks. The fault impedances have been derived under different fault conditions. Furthermore, a recursive fault distance estimation method is proposed utilizing the measured fault impedance and power line parameters. The proposed scheme can resolve the errors caused by the non-homogeneous power lines, the presence of lateral loads since, the fault impedance will always be updated with the recursive form. For the verification of the proposed scheme, a filed test has been peformed with varying fault resistances in the 22.9(kV) radial system. Power meters and fault locators were installed at the substation. It was figured out that the performance of the discrete wavelet and the recursive scheme are very good even for high fault resistance condition.

키워드

참고문헌

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