Study on Gaseous Products in the Aging Process of Silicone Oil in Cable Terminals

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI:10.1109/CEIDP.2018.8544876

Ruobing Zhang, Z. Qiu, Jun Wu, Xin Li, Shanshan Wang

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引用次数: 4

Abstract

In the cable system, terminals are more likely to break down. The aging process of silicone oil is considered as the main reason of the accidents occurred on the oil-filled terminals. It is observed that gas generation occurs in the aging process of silicone oil. This paper focuses on the relationship between the gaseous product generated by spark discharge and the aging status of the silicone oil. In the present study, a needle-plate electrode is used to simulate the aging process of the silicone oil, and a gas chromatograph is used to analyze the gases generated during the discharge. Dielectric loss tangent and volume resistivity are measured to characterize the aging state of the silicone oil. The volumes of each kind of gaseous product increase with cumulative discharge quantity, and carbon monoxide and hydrogen occupy the largest proportion. When the experimental silicone oil reaches the aging status, acetylene appears and the volume of hydrogen increases rapidly, so the appearance of acetylene and the proportion of hydrogen reaching 6% in total gaseous product are the symbol of the aging of silicone oil.

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电缆端子用硅油老化过程中气态产物的研究

在电缆系统中，终端更容易发生故障。硅油的老化过程被认为是导致充油端子发生事故的主要原因。观察到硅油在老化过程中会产生气体。本文重点研究了火花放电产生的气体产物与硅油老化状态的关系。本研究采用针板电极模拟硅油的老化过程，采用气相色谱仪分析放电过程中产生的气体。通过测量介质损耗正切和体积电阻率来表征硅油的老化状态。各类气体产物体积随累积排放量的增加而增加，其中一氧化碳和氢气所占比例最大。当实验硅油达到老化状态时，乙炔出现，氢气体积迅速增加，因此乙炔的出现和氢气占总气态产物的比例达到6%是硅油老化的标志。

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

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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