Analysis of Characteristic Frequency along Fault Distance on a Transmission Line

송전 선로의 사고 거리에 따른 특성 주파수 해석

  • 남순열 (효성중공업 연구소) ;
  • 홍정기 (효성중공업 연구) ;
  • 강상희 (명지대학교 전기공학과/차세대 전력기술 연구센) ;
  • 박종근 (서울대학교 전기공학부)
  • Published : 2004.08.01

Abstract

Since the characteristic frequency is decreased in proportion to the fault distance, the characteristic frequency component may be insufficiently eliminated by a low-pass filter on a long transmission line. In order to set a standard for the cut-off frequency of the low-pass filter, this paper proposes a method for obtaining the characteristic frequencies due to line faults. The application results of the proposed method are presented for line to ground (LG) faults and line to line (LL) faults on a 345 kV 200 km overhead transmission line. The EMTP is used to generate fault signals under different fault locations and fault inception angles. By comparison between the characteristic frequencies obtained from the proposed method and the EMTP simulation, it is shown that the proposed method accurately obtains the characteristic frequency.

Keywords

References

  1. L. M. Popovic, 'General equations of the line represented by discrete parameters. II. Resonant phenomena,' IEEE Trans. Power Delivery, vol. 6, No. 1, January 1991, pp. 302-308 https://doi.org/10.1109/61.103752
  2. Y. Tang, H. Chen, H. Wang, and F. Dai, 'Transmission line models used in travelling wave studies,' Transmission and Distribution Conference, Vol. 2, 1999, pp. 797-803 https://doi.org/10.1109/TDC.1999.756151
  3. A.G. Phadke, and J.S. Thorp, Computer Relaying for Power Systems, Research Studies Press Ltd. 1988
  4. J. C. Gu, and S. L. Yu, 'Removal of DC-offset in current and voltage signals using a novel Fourier filter algorithm,' IEEE Trans. Power Delivery, vol. 15, No. 1, January 2000, pp. 73-79 https://doi.org/10.1109/61.847231
  5. S. R. Nam, S. H. Kang, and J. K. Park, 'An Analytic Method for Measuring Accurate Fundamental Frequency Components,' IEEE Trans. Power Delivery, Vol. 17, April 2002, pp. 405-411 https://doi.org/10.1109/61.997907
  6. J. F. Hauer, C. J. Demeure, and L. L. Scharf, 'Initial results in Prony analysis of power system response signals,' IEEE Trans Power Systems, Vol. 5, No. 1, February 1990, pp. 80-89 https://doi.org/10.1109/59.49090
  7. R. Benato, R. Caldon, A. Paolucci, R. Turri, 'Resonance phenomena on line-to-ground fault current harmonics in MV networks,' 8th International Conference on Harmonics and Quality of Power, Vol. 1, October 1998, pp. 359-364 https://doi.org/10.1109/ICHQP.1998.759913