Prediction of electrical performance of medium voltage epoxy insulated equipment

Author

Iyer, G. ; Gorur, R.S. ; Krivda, A. ; Mahonen, P.

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA

Volume

17

Issue

2

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

334

Lastpage

342

Abstract

The paper presents a theoretical model based on the 2-parameter Weibull Distribution to predict the performance of cycloaliphatic based medium voltage (< 100 kV) insulation equipment. The model combines two prominent modes of degradation, namely surface damage (tracking and erosion) and flashover. New samples and samples that were aged in service and in outdoor test sites were evaluated. The flashover model is based on evaluating surface resistance under wet conditions. The degradation model is based on evaluating the tracking and erosion resistance in the Inclined Plane (ASTM D2303) test. The predictions of the model are shown to be in good agreement with experimental results. A total of 20 insulators and instrument transformers (new and field-aged) were evaluated.

Keywords

Weibull distribution; ageing; epoxy insulation; equipment evaluation; flashover; instrument transformers; insulator contamination; insulator testing; ASTM D2303; Weibull distribution; cycloaliphatic based medium voltage insulation equipment; electrical performance prediction; erosion damage; flashover; inclined plane test; instrument transformer; medium voltage epoxy insulated equipment; polymeric insulators; surface damage; surface resistance; tracking damage; wet condition; Aging; Degradation; Dielectrics and electrical insulation; Flashover; Insulation life; Medium voltage; Predictive models; Surface resistance; Testing; Weibull distribution; Polymeric insulators, surface resistance, flashover, ESDD, inclined plane tracking test.;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2010.5448086

Filename

5448086