Comparison of different methods available for evaluating remaining life of OIP insulation used in power transformers

2017 6th International Conference on Computer Applications In Electrical Engineering-Recent Advances (CERA) Pub Date : 2017-10-01 DOI:10.1109/CERA.2017.8343328

A. Kumari, H. C. Verma, A. Baral, S. Chakravorti

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引用次数: 1

Abstract

This paper provides an analysis of various methods for estimating the remaining life of in-service power transformer. Degree of Polymerization (DP) value is perhaps the most effective parameter for determining the remaining life of an Oil-Impregnated-Paper insulation system. Due to the invasive nature of the test, DP value determination using paper samples is not practically feasible for in-situ transformers. On the other hand, commercial equipment's make it relatively easy to obtain the values of paper-moisture and tanδ. Hence, these parameters have become popular among utilities. In the present paper, paper-moisture and tanδ are used to obtain several important dielectric properties (like tensile strength, Degree of Polymerization, hotspot temperature) which are subsequently used for estimating the remaining life of several real-life power transformers. Efforts are also made to identify the method which is capable of identifying remaining life of power transformer with minimum error.

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电力变压器OIP绝缘剩余寿命评估方法的比较

本文分析了在役电力变压器剩余寿命估算的各种方法。聚合度(DP)值可能是确定油浸纸绝缘系统剩余寿命的最有效参数。由于测试的侵入性，使用纸质样品确定DP值对于原位变压器实际上是不可行的。另一方面，商用设备使纸张水分和水分的值相对容易获得。因此，这些参数在实用程序中很流行。在本论文中，纸张湿度和tanδ用于获得几个重要的介电性能(如抗拉强度，聚合度，热点温度)，随后用于估计几个实际电力变压器的剩余寿命。力求找出一种能够以最小误差确定电力变压器剩余寿命的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2017 6th International Conference on Computer Applications In Electrical Engineering-Recent Advances (CERA)

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