Title :
A new method for locating partial discharges in transformers
Author :
Steiner, J.P. ; Weeks, W.L.
Author_Institution :
Biddle Instrum., Blue Bell, PA, USA
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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1990. Annual Report., Conference on
Conference_Location :
Pocono Manor, PA
DOI :
10.1109/CEIDP.1990.201354
