전기학회논문지P (The Transactions of the Korean Institute of Electrical Engineers P)

  • 제61권2호
  • /
  • Pages.87-92
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  • 2012
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  • 1229-800X(pISSN)
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  • 2586-7792(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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고장 왜란 기록기를 위한 주파수 추정 기법의 비교 연구

Comparative Studies of Frequency Estimation Method for Fault Disturbance Recorder

  • 박철원 (강릉원주대학교 전기공학과)
  • 투고 : 2012.04.29
  • 심사 : 2012.05.15
  • 발행 : 2012.06.01
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초록

Voltage and current phasor estimation has been executed by GPS-based synchronized PMU, which has become an important way of wide-area blackout protection for the prevention of expending faults in a power system. The PMU technique can not easily get the field data and it is impossible to share information, so that there has been used a FNET(Frequency Monitoring Network) method for the wide-area intelligent protection in USA. It consists of FDR(Fault Disturbance Recorder) and IMS(Information Management System). Therefore, FDR must provide an optimal frequency estimation method that is robust to noise and failure. In this paper, we present comparative studies for the frequency estimation method using IRDWT(Improved Recursive Discrete Wavelet Transform), FRDWT(Fast Recursive Discrete Wavelet Transform), and DFT(Discrete Fourier Transform). The Republic of Korea345[kV] power system modeling data by EMTP-RV are used to evaluate the performance of the proposed two kinds of RDWT(Recursive Discrete Wavelet Transform) and DFT. The simulation results show that the proposed frequency estimation technique using FRDWT could be the optimal frequency measurement method, and thus be applied to FDR.

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참고문헌

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