Life estimation techniques for transformer insulation

被引：0
|
作者：
Martin, D. [1 ]
Cui, Y. [1 ]
Saha, T. [1 ]
Lelekakis, N. [2 ]
Wijaya, I.
机构：
[1] Univ Queensland, Power & Energy Syst ITEE, Brisbane, Qld, Australia
[2] Monash Univ, Ctr Power Transformer Monitoring Diagnost & Life, Melbourne, Vic, Australia
来源：
2013 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING CONFERENCE (AUPEC) | 2013年
关键词：
Transformers; Oil insulation; Paper products; Dielectric Breakdown; OIL/PAPER SYSTEM; AGING RATE; PAPER; ACID;
D O I：
暂无
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：
A significant proportion of power transformers are approaching the end of their designed life. However, the Utilities are coming under increasing pressure to delay asset upgrade costs. Therefore, in order to determine whether delaying a replacement for a particular power transformer is safe the Utilities require tools to help them reach this decision. One reason why a power transformer reaches the end of its life is when its paper insulation has degraded to the point where it has lost its tensile strength. The rate at which paper degrades is related to the temperatures within the transformer, the water content and whether or not the transformer is sealed. For this article we investigated the application of a model to determining the remaining life of an old power transformer. The unit failed and so we were able to measure the properties of the paper. Then, we applied our model using estimates to how the water content and temperature distribution changed throughout the life of the transformer. We found close agreement between our model and measurements.
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页数：6
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