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

作　　者：Zhixian Zhang Jiali Lei Weigen Chen Tianhe Yang Yuxuan Song Kejie Wu Fan Liu 

机构地区：[1]State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing,China [2]State Grid Hubei Electric Power Research Institute,Wuhan,Hubei,China

出　　处：《High Voltage》2022年第2期325-335,共11页高电压（英文）

基　　金：supported by the National Natural Science Foundation of China(U1766217);the State Grid Corpo-ration of China’s Science and Technology Project(5500‐202099279A‐0‐0‐00).

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 dis-charges 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.

关 键 词：INSULATION FIBRE SENSOR 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]