Denoising UHF signal for PD detection in transformers based on wavelet technique

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

Research output: Contribution to conferencePaper

46 Citations (Scopus)

Abstract

Although the UHF technique is immune from electrical interference; communication noises, thermal noise from the detection system, and periodic pulse-shaped noise from thyristor operation are usually found in the UHF signal. In this paper, a method based on discrete wavelet transforms is introduced. Three steps in the de-noising process are studied and discussed. Hundreds of combinations involved in the process are compared. An artificial signal is created by mixing the specific noise with a 'clean' UHF signal. The optimal process and corresponding parameters are defined by comparing the 'clean' signal and the de-noised version of the artificial signal.
Original languageEnglish
Pages166-169
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

  • denoising
  • uhf signal
  • pd detection
  • transformers
  • wavelet technique

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