A comparative study of the chemical stability of esters for use in large power transformers

被引：21
|
作者：
Martin, D. [1 ]
Wang, Z. D. [1 ]
Darwin, A. W. [2 ]
James, I. [2 ]
机构：
[1] Univ Manchester, Manchester M13 9PL, Lancs, England
[2] AREVA T & D, Stafford, England
来源：
2006 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA | 2006年
关键词：
D O I：
10.1109/CEIDP.2006.311977
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：
There is uncertainty as to whether ester oils will be suitable replacements for mineral oil used in large free breathing power transformers, such as those found on the transmission system of the UK. This is partly due to concerns regarding the chemical stability of esters and how stability will affect the dielectric properties of the oil. This paper presents research investigating how ester dielectric properties change due to the effects of ageing compared to mineral oil and seeks to advise Utilities which parameters to monitor in service. This investigation considered the dielectric properties of AC and impulse dielectric strength, dielectric dissipation factor and acidity. It is recommended to monitor trends over working life rather than simply comparing values, and to use at least two parameters including the dielectric dissipation factor and acidity.
引用
收藏
页码：493 / 496
页数：4
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