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.

Conference

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

Fingerprint

Multipath propagation
Time delay
High pass filters

Keywords

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

Cite this

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
Yang, L. ; Judd, M.D. ; Bennoch, C.J. / Time delay estimation for UHF signals in PD location of transformers. Paper presented at 2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04., Boulder, United States.3 p.
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Yang, L, Judd, MD & Bennoch, CJ 2004, 'Time delay estimation for UHF signals in PD location of transformers' Paper presented at 2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04., Boulder, United States, 17/10/04 - 20/10/04, pp. 414-417. https://doi.org/10.1109/CEIDP.2004.1364275

Time delay estimation for UHF signals in PD location of transformers. / Yang, L.; Judd, M.D.; Bennoch, C.J.

2004. 414-417 Paper presented at 2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04., Boulder, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Time delay estimation for UHF signals in PD location of transformers

AU - Yang, L.

AU - Judd, M.D.

AU - Bennoch, C.J.

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N2 - 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.

AB - 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.

KW - time delay

KW - estimation

KW - uhf signals

KW - pd location

KW - transformers

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Yang L, Judd MD, Bennoch CJ. Time delay estimation for UHF signals in PD location of transformers. 2004. 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