A Novel Anti-interference Method for Partial Discharges On-line Measurement of Hv Power Cables

نویسندگان

  • Wenjie LI
  • Junhua LUO
  • Jiankang ZHAO
  • Shaoxin MENG
  • Rong XIA
  • Xuejin ZHANG
  • Leilei PAN
چکیده

In order to extract the millivolt range partial discharge(PD) signals drown in the harsh electromagnetic interference for HV power cables, this paper presents a novel antiinterference method, based on fast fourier transform autothresholding method, 1-D discrete wavelet thresholding method and three phase amplitude and arrive-time difference method. This method is examined and proved to be effective on the power cable with actual interference. Moreover, the insulation condition assessment application of a 7.1km 220kV XLPE power cable line shows that the anti-interference effect is outstanding to eliminate field harsh interference, laying a good foundation for further PD pattern analysis and diagnosis.

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تاریخ انتشار 2012