A new method for locating partial discharges in transformers

Author

Steiner, J.P. ; Weeks, W.L.

Author_Institution

Biddle Instrum., Blue Bell, PA, USA

fYear

1990

fDate

28-31 Oct 1990

Firstpage

275

Lastpage

281

Abstract

A novel method for determining the axial location of partial discharges in cast coils is presented. A signal processing algorithm is used to determine the normalized energy as a function of position along the coil. The normalized energy is interpreted in terms of the attenuation of the electromagnetic emissions from the partial discharges along the axis of the transformer. A plot of the attenuation as a function of distance along the length of coil clearly indicates the location of the partial discharges. It is concluded that the asymptotic maximum-likelihood estimate of the energy profile is an effective means for localizing partial discharge sites in the winding sections of a cast coil

Keywords

fault location; partial discharges; power transformers; EM emissions attenuation; asymptotic maximum-likelihood estimate; axial location; cast coils; partial discharge location method; signal processing algorithm; Attenuation; Coils; Electromagnetic measurements; Frequency; Magnetic field measurement; Manufacturing processes; Partial discharge measurement; Partial discharges; Thermal stresses; Transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1990. Annual Report., Conference on

Conference_Location

Pocono Manor, PA

Type

conf

DOI

10.1109/CEIDP.1990.201354

Filename

201354