Locating partial discharge sources in high voltage transformer windings

P. L. Lewin, I. O. Golosnoy, Ramizi Mohamed

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The analysis of partial discharge (PD) measurement data obtained using radio frequency current transducers (RFCT) incorporated into the external earthing connections (i.e bushing tap points and neutral to earth connections) offers the possibility of on-line condition monitoring of large transformers. A method for locating PD sources in windings has been developed, based on analysis of differential equations that model the propagation of PD signals from the source to the measurement point. Analysis reveals that if the discharge at the source is assumed to be impulse-like, then the form of the response at the measurement points can be simulated as a function of source location along the winding. If all parameters of the winding are known then it is possible to model the response, however, in the field this is often not the case. So the method developed here uses information from the PD measurements themselves to estimate the unknown coefficients required to simulate the likely discharge currents. With these estimates it is then possible to compare PD measurement information with simulation data in order to identify the most likely location of a PD source. An experiment based on a section of high voltage winding has been used to produce PD measurement data and to validate the proposed approach.

Original languageEnglish
Title of host publication2011 Electrical Insulation Conference, EIC 2011
Pages196-200
Number of pages5
DOIs
Publication statusPublished - 2011
Event30th Electrical Insulation Conference, EIC 2011 - Annapolis, MD
Duration: 5 Jun 20118 Jun 2011

Other

Other30th Electrical Insulation Conference, EIC 2011
CityAnnapolis, MD
Period5/6/118/6/11

Fingerprint

Transformer windings
Partial discharges
Electric potential
Bushings
Information use
Condition monitoring
Electric grounding
Transducers
Differential equations
Earth (planet)

Keywords

  • condition monitoring
  • partial discharge
  • transformer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Lewin, P. L., Golosnoy, I. O., & Mohamed, R. (2011). Locating partial discharge sources in high voltage transformer windings. In 2011 Electrical Insulation Conference, EIC 2011 (pp. 196-200). [5996145] https://doi.org/10.1109/EIC.2011.5996145

Locating partial discharge sources in high voltage transformer windings. / Lewin, P. L.; Golosnoy, I. O.; Mohamed, Ramizi.

2011 Electrical Insulation Conference, EIC 2011. 2011. p. 196-200 5996145.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lewin, PL, Golosnoy, IO & Mohamed, R 2011, Locating partial discharge sources in high voltage transformer windings. in 2011 Electrical Insulation Conference, EIC 2011., 5996145, pp. 196-200, 30th Electrical Insulation Conference, EIC 2011, Annapolis, MD, 5/6/11. https://doi.org/10.1109/EIC.2011.5996145
Lewin PL, Golosnoy IO, Mohamed R. Locating partial discharge sources in high voltage transformer windings. In 2011 Electrical Insulation Conference, EIC 2011. 2011. p. 196-200. 5996145 https://doi.org/10.1109/EIC.2011.5996145
Lewin, P. L. ; Golosnoy, I. O. ; Mohamed, Ramizi. / Locating partial discharge sources in high voltage transformer windings. 2011 Electrical Insulation Conference, EIC 2011. 2011. pp. 196-200
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