Oil-paper insulation partial discharge ultrasonic multifrequency sensing array based on fibre-optic Fabry–Perot sensor

High voltage

article

Zhixian Zhang¹  Jiali Lei¹  Weigen Chen¹  Tianhe Yang¹  Yuxuan Song¹  Kejie Wu¹  Fan Liu² 

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University;State Grid Hubei Electric Power Research Institute

关键词: paper;    fibre optic sensors;    sensor arrays;    partial discharge measurement;    ultrasonic transducer arrays;    insulating oils;    diaphragms;   

DOI  :  10.1049/hve2.12123

学科分类：物理（综合）

来源: Wiley

【 摘 要 】

In order to improve the sensitivity and accuracy of oil-paper insulation partial discharge detection by the fibre-optic Fabry–Perot (FP) ultrasonic sensor, this work studied the ultrasonic signal’s frequency characteristics of typical oil-paper insulation partial discharges and the vibration characteristics of the FP sensor’s diaphragm in the liquid environment. Based on the works above, a multifrequency FP sensor array is proposed, consisting of several FP sensors with different resonant frequencies to detect partial discharges. The experimental results show that the liquid environment has a significant effect on the vibration characteristics of the FP sensor’s diaphragm, and the sensitivity and accuracy of partial discharge detection can be improved based on the multifrequency FP sensing array, which can also be applied in the pattern recognition and localisation of partial discharges.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND