Portable Unilateral NMR Measuring System for Assessing the Aging Status of Silicon Rubber Insulators


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Рұқсат жабық Тек жазылушылар үшін

Аннотация

Silicon rubber insulators (SRIs) are widely used in power transmission lines as line support and as insulation between the line and the tower. Given that the aging of SRIs threatens the safety and stability of power grids, the accurate assessment of the aging status of SRIs is crucial. In this study, a portable unilateral magnetic resonance (UMR) measuring system for the nondestructive testing of the aging status of SRIs was proposed. The proposed NMR measurement system includes a mini UMR sensor and a measurement circuit. Details of the mini UMR sensor structure and low-cost circuit design were discussed. The Carr–Purcell–Meiboom–Gill sequence was used to record the 1H transverse relaxation curves of SRI sheds. Inverse Laplace transformation was employed to obtain the T2 distribution, and two peaks in the T2 distribution curve were observed. The long T2 component was selected to quantify the aging degree because of its stability compared with the short T2 component. To eliminate the inaccuracy of measurement introduced by the different chemical structures of SRIs produced by different companies, the aging status of the SRIs was represented by the changes in T2 between the surface and internal materials of the SRI.

Авторлар туралы

Zheng Xu

State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University

Хат алмасуға жауапты Автор.
Email: pinexz@163.com
ҚХР, Chongqing, 400044

Lu Li

State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University

Email: guopan0822@163.com
ҚХР, Chongqing, 400044

Pan Guo

School of Physics and Electronic Engineering, Chongqing Normal University

Хат алмасуға жауапты Автор.
Email: guopan0822@163.com
ҚХР, Chongqing, 401331

Yongliang Ji

Chongqing Electric Power Research Institute, State Grid Chongqing Electric Power Company

Email: guopan0822@163.com
ҚХР, Chongqing, 400020

Jiaming Wu

State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University

Email: guopan0822@163.com
ҚХР, Chongqing, 400044

Chuanhong He

School of Physics and Electronic Engineering, Chongqing Normal University

Email: guopan0822@163.com
ҚХР, Chongqing, 401331

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© Springer-Verlag GmbH Austria, part of Springer Nature, 2018