高压电器2017，Vol.53Issue(5)：22-27,34,7.DOI:10.13296/j.1001-1609.hva.2017.05.004
测量复合绝缘子伞裙老化状态的低场核磁共振传感器
Low-field NMR Sensor Used for Measuring the Aging Status of Shed of Composite Insulators
摘要
Abstract
With the increasing of the service time of silicone rubber insulators in the power system,the aging problem of the silicone rubber insulators has been more serious.In order to measure the aging of insulators,and according to the structure of the insulators,we designed a portable nuclear magnetic resonance (NMR)sensor with a Ushape structure.The composite insulators with different service years had been measured,and a Carr-Purcell-Meiboom-Gill(CPMG) sequence was employed as the excitation.The CPMG echo attenuation data of different samples were recorded.The CPMG data were fitted with a bi-exponential function and the effective transverse relaxation time:t2,short and t2,lons were obtained.The experimental results demonstrate that the t2,long parameter has a high correlation with the insulator's aging degree:an increase in the aging degree of the insulator clearly results in a decrease of t2,long.关键词
低场核磁共振传感器/复合绝缘子/老化测量Key words
low-field NMR sensor/composite insulator/aging testing引用本文复制引用
黄健华,徐征,杨挺,夏云峰,杨武,尹创荣,陈锡阳,罗瑞彬,何为..测量复合绝缘子伞裙老化状态的低场核磁共振传感器[J].高压电器,2017,53(5):22-27,34,7.基金项目
国家自然科学基金资助(51107150,51377182).Project Supported by National Natural Science Foundation of China(51107150,51377182). （51107150,51377182）
