[1]夏云峰,宋新明,何 为.复合绝缘子老化状态核磁共振分析方法[J].高压电器,2020,56(02):197-201,209.[doi:10.13296/j.1001-1609.hva.2020.02.029]
 XIA Yunfeng,SONG Xinming,HE Wei.Nuclear Magnetic Resonance Method for Analyzing Aging Status of Composite Insulators[J].High Voltage Apparatus,2020,56(02):197-201,209.[doi:10.13296/j.1001-1609.hva.2020.02.029]
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复合绝缘子老化状态核磁共振分析方法()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年02期
页码:
197-201,209
栏目:
技术讨论
出版日期:
2020-02-14

文章信息/Info

Title:
Nuclear Magnetic Resonance Method for Analyzing Aging Status of Composite Insulators
作者:
夏云峰1  宋新明1 何 为2
(1. 广东电网有限责任公司东莞供电局, 广东 东莞 523000; 2. 重庆大学输配电装备及系统安全与新技术国家重点实验室, 重庆 400044)
Author(s):
XIA Yunfeng1 SONG Xinming1 HE Wei2
(1. Dongguan Power Supply Bureau of Guangdong Power Grid Corporation, Guangdong Dongguan 523000, China; 2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)
关键词:
低场核磁共振传感器 复合绝缘子 老化测量
Keywords:
low-field NMR sensor composite insulator aging measurement
DOI:
10.13296/j.1001-1609.hva.2020.02.029
摘要:
复合绝缘子在电力系统中使用越来越广泛,但是随着运行时间的增长容易老化,威胁电力系统的安全运行。为了方便快捷地检测复合绝缘子的老化程度,文中设计了一种低磁场核磁共振的传感器和万向旋转夹具,专门适用于复合绝缘子伞裙护套的结构。测量样品为挂网运行不同时间的硅橡胶复合绝缘子,采用CPMG脉冲序列激励,得到样品的CPMG回波衰减数据。采用反拉普拉斯变换法对测量的CPMG回波信号进行反演,以横向弛豫时间作为反映复合绝缘子老化状态的特征量,并与红外光谱法测量结果进行对比。结果显示:复合绝缘子核磁共振测量结果与红外光谱内外层吸收峰吻合,两种结果在一定程度上都能反映复合绝缘子的老化程度。其中随着绝缘子的老化程度越高,核磁共振的T2值越小,红外光谱的吸收值也越低。
Abstract:
To rapidly measure the aging degree of insulators, we designed a low-field nuclear magnetic resonance(NMR)sensor with universal clamp according to the structure of the composite insulator. The insulators with different service years were measured, and the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence was employed for excitation. The CPMG echo attenuation data of different samples were recorded. These CPMG data were analyzed by inverse Laplace transformation, and the transverse relaxation time was selected as the characteristic parameter of aging degree of composite insulator. The result of the NMR method is compared with that of infrared spectroscopy. It is shown that NMR result is consistent with the absorption peak of the infrared spectrum, and both results can reflect the aging degree of the composite insulator to a certain extent. With development of the composite insulator aging, both the T2 value of NMR and the absorption value of the infrared spectrum become smaller.

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备注/Memo

备注/Memo:
收稿日期:2019-10-16; 修回日期:2019-12-21基金项目:国家自然科学基金面上项目(51377182)。Project Supported by National Natural Science Foundation of China (51377182).夏云峰(1982—),男,高级工程师,博士,主要研究方向为输变电设备运行与检修、高电压与绝缘技术。
更新日期/Last Update: 2020-02-14