Aging of oil-impregnated transformer insulation studied through partial discharge analysis

Conference paper (2010)

Authors

X Chen OLD High-Voltage Technology and Management
P.H.F. Morshuis OLD High-Voltage Technology and Management
Q. Zhuang OLD High-Voltage Technology and Management
J.J. Smit OLD High-Voltage Technology and Management
Z Xu OLD High-Voltage Technology and Management
Research Group
OLD High-Voltage Technology and Management
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Published Date

2010

Language

English

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Research Group

OLD High-Voltage Technology and Management

Abstract

The aging of the epoxy-paper insulation of an oil-impregnated transformer was studied through partial discharge analysis. Accelerated electrical aging tests were carried out on samples of transformers windings, with and without paper insulation. Partial discharge (PD) measurements according to standard IEC 60270 were performed periodically during aging, and partial discharge phase patterns were recorded throughout the aging test. Some representative PD phenomena were obtained from the experimental results. The evolution of typical PD patterns is reported until breakdown.