Time delay estimation for UHF signals in PD location of transformers

L. Yang, M.D. Judd, C.J. Bennoch

Research output: Contribution to conferencePaper

29 Citations (Scopus)

Abstract

Time delay estimation (TDE) is essential for PD location using the UHF technique. However, noise and effects of multi-path propagation are two main problems affecting the accuracy of the estimate. Comparing two methods, which are based on cumulative energy curve and power curve respectively, a cross correlation based method is employed to achieve the estimation. A high-pass filter is applied to the UHF signal to eliminate operating noises. The phase characteristic of the filter is designed to be linear for making the time delay a constant in terms of frequency. A window in the time domain is selected to reduce the effect of multi-path propagation.
Original languageEnglish
Pages414-417
Number of pages3
DOIs
Publication statusPublished - Oct 2004
Event2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. - Boulder, United States
Duration: 17 Oct 200420 Oct 2004

Conference

Conference2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04.
CountryUnited States
CityBoulder
Period17/10/0420/10/04

Keywords

  • time delay
  • estimation
  • uhf signals
  • pd location
  • transformers

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    Yang, L., Judd, M. D., & Bennoch, C. J. (2004). Time delay estimation for UHF signals in PD location of transformers. 414-417. Paper presented at 2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04., Boulder, United States. https://doi.org/10.1109/CEIDP.2004.1364275