Improving the Assessment of Remaining Life of Service Aged Power Transformers

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI:10.1109/EIC43217.2019.9046610

A. Naderian, Pranav Pattabi, L. Lamarre

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引用次数: 1

Abstract

A significant number of power transformers worldwide are displaying an ever-increasing trend of unreliable operation and shortened lifetimes, due to poor electrical or mechanical conditions and onerous loading situations. Monitoring the condition of these transformers and accurately predicting their useful remaining life is quite significant to utilities and/or independent owners especially considering the high replacement cost and criticality associated with the smooth functioning of these assets. In this regard, the condition of the insulation system plays a pivotal role in influencing the remnant useful life associated with power transformers. This paper provides a better estimation for determining the remaining life of a power transformer based on the results of an improved dynamic model. The model is an upgrade over the basic life expectancy formulation provided by existing IEEE and IEC standards in this domain and considers parameters such as hotspot temperature, moisture, oxygen, the ratio of carbon oxides (CO2/CO), the degree of polymerization (DP) and the concentration of furfural (2-FAL) or methanol (MeOH) as aging markers.

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改进服役老化电力变压器剩余寿命评估

由于恶劣的电气或机械条件和繁重的负载情况，世界范围内大量的电力变压器呈现出日益增长的不可靠运行和缩短寿命的趋势。监测这些变压器的状态并准确预测其剩余使用寿命对公用事业和/或独立业主来说非常重要，特别是考虑到这些资产的高重置成本和与平稳运行相关的关键性。在这方面，绝缘系统的状况对电力变压器的剩余使用寿命起着至关重要的作用。本文基于改进的动态模型的结果，为确定电力变压器的剩余寿命提供了更好的估计方法。该模型是对该领域现有IEEE和IEC标准提供的基本预期寿命公式的升级，并考虑了诸如热点温度，湿度，氧气，碳氧化物比率(CO2/CO)，聚合度(DP)以及糠醛(2-FAL)或甲醇(MeOH)浓度等参数作为老化标记。

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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2019 IEEE Electrical Insulation Conference (EIC)

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