Electrical and chemical diagnostics of transformers insulation .B. Accelerated aged insulation samples

被引：27

作者：

Saha, TK ^{[1
]}

Darveniza, M ^{[1
]}

Hill, DJT ^{[1
]}

Le, TT ^{[1
]}

机构：

[1] UNIV QUEENSLAND,DEPT CHEM,ST LUCIA,QLD 4067,AUSTRALIA

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 1997年 / 12卷 / 04期

关键词：

D O I：

10.1109/61.634175

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 analysis of accelerated aged insulation samples to investigate the degradation processes observed in the insulation from aged transformers. Short term accelerated ageing experiments were performed on paper wrapped insulated conductors and on pressboard samples. The condition of aged insulation samples was investigated by two relatively new diagnostic techniques: (a) measurements of interfacial polarization spectra by a DC method (b) measurements of molecular weight and its distribution by gel permeation chromatography. Several other electrical properties of the paper/pressboard samples were also studied. Possible correlations have been investigated among the different measured properties. The GPC results have been used to predict how molecular weights change with temperature and time.

引用

页码：1555 / 1561

页数：7