Depolarization index for dielectric aging indicator of rotating machines

Author

Bhumiwat, Supatra A.

Volume

22

Issue

6

fYear

2015

fDate

12/1/2015 12:00:00 AM

Firstpage

3126

Lastpage

3132

Abstract

The term Depolarization Index (dP.I.) for rotating machines is introduced in this article as an additional information to the time-domain and frequency-domain dielectric response results for gaining high-precision interpretation and identification of some types of aging in solid dielectrics, particularly the non-restoring thermal trouble and insulation abrasion. Factors affecting the correctness and accuracy of dP.I. are discussed. The dP.I data from 60 medium-to-large generators and 117 large industrial motors, in Asia-Pacific were analyzed to provide the conclusion.

Keywords

abrasion; ageing; electric generators; electric motors; frequency-domain analysis; machine insulation; time-domain analysis; Asia-Pacific; depolarization index; dielectric aging indicator; frequency-domain dielectric response; high-precision interpretation; industrial motors; insulation abrasion; medium-to-large generators; rotating machines; solid dielectric aging; time-domain dielectric response; Aging; Capacitance; Dielectrics; Indexes; Insulation; Rotating machines; Shape; Polarization; abrasion; absorption; capacitance; conduction; depolarization; dielectric; generators; motors; overheating;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2015.005259

Filename

7367505