Experience with return voltage measurements for assessing insulation conditions in service-aged transformers

被引：70

作者：

Saha, TK ^{[1
]}

Yao, ZT ^{[1
]}

机构：

[1] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld, Australia

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2003年 / 18卷 / 01期

关键词：

condition monitoring; dielectric measurement; insulation aging; insulation life; molecular weight; polarization; power transformer; transformer insulation;

D O I：

10.1109/TPWRD.2002.803722

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper describes the investigation of the insulation condition of a number of power and distribution type transformers of different manufacturing dates and with different operating histories. Return voltage measurements were conducted for these transformers. Effects of moisture and aging on the oilpaper insulation of these transformers were investigated and results are presented in this paper. Moisture in oil samples at known temperature was measured for these transformers. Previously accelerated aging experiments were performed on paper wrapped insulated conductors in different environments over a temperature range of 115 to 145 degreesC. Results from the measurements on transformers are compared with those of the accelerated aged samples and are described in this paper.

引用

页码：128 / 135

页数：8

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