核磁共振检测复合绝缘子老化状态的新方法

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI:10.1109/ICEMPE51623.2021.9509181

Zhangting Yu, Dajian Li, Liangyuan Chen

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引用次数: 0

摘要

为了测量硅橡胶绝缘子的老化状态，提出了一种新的核磁共振(NMR)测量方法，研制了便携式低场核磁共振(NMR)测量系统。本文介绍了一种核磁共振传感器磁体和射频线圈的设计方法，并对220kV高压下复合绝缘子的老化进行了实验研究。研究得出复合绝缘子横向弛豫时间随运行时间的增加而减小的结论。因此，低场核磁共振可以定量评价复合绝缘子伞裙的老化状态。

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A new method of nuclear magnetic resonance for aging State detection of composite insulators

In order to measure the aging state of silicone rubber insulators, a new method of nuclear magnetic resonance(NMR) measurement is proposed and a portable low field NMR measurement system is developed. This paper introduced a design method of magnet and RF coil of NMR sensor and made a experiment about the aging of composite insulators on 220kV high voltage. The study draw a conclusion that the transverse relaxation time of composite insulators decreases with the increasing of running time. Therefore, low-field NMR can be used to evaluate the aging state of composite insulator umbrella skirt quantitatively.

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2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)

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