单壁碳纳米管气体传感器在GIS局部放电检测中的应用(英文)  

Single-walled Carbon Nanotube Gas Sensor Used in Partial Discharge Detection of GIS

作　　者：魏宁 丁卫东 朱宜东 苏春强 末广纯也 

机构地区：[1]State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University [2]Kyushu University,Fukuoka 819-0395,Japan

出　　处：《高电压技术》2011年第11期2700-2706,共7页High Voltage Engineering

基　　金：Supported by National Natural Science Foundation of China(50707023)

摘　　要：This paper describes a realizable fabrication method to manufacture chemical gas sensors by using singlewalled carbon nanotubes(SWCNTs).The sensors were tested for the monitoring of SF_6 decomposition gas produced by partial discharge(PD) in GIS tank.The results showed a superior sensitivity,favorable reliability and good reproducibility. For further clarifying the relativity between sensor response and partial discharge activity,the discharge in GIS tank was monitored simultaneously through conventional pulse current method and a SWCNTs gas sensor,and the measurement results were put together for comparative analysis in this paper.The sensor response showed a great dependence on partial discharge characteristics.The sensor response increased nearly linearly with limits when the energy of discharge was persistently accumulated.Partial discharge power had a great influence on the response rate and the time delay.With the increase of partial discharge power,the response rate augmented almost in proportion while the time delay gradually becomes shorter with limits.The results were quite favorable to assess the partial discharge intensity and duration to some extent.Compared with pulse current method,the sensor was predominant to detect partial discharge exposed to constantly high levels of noise.It was capable of detecting partial discharge which was too weak to be detected with pulse current method.However,the sensor response didn't show much dependency on the apparent discharge of partial discharge.This paper describes a realizable fabrication method to manufacture chemical gas sensors by using single- walled carbon nanotubes （SWCNTs）. The sensors were tested for the monitoring of SF6 decomposition gas produced by partial discharge （PD） in GIS tank. The results showed a superior sensitivity, favorable reliability and good repro dueibitity. For further clarifying the relativity between sensor response and partial discharge activity, the discharge in GIS tank was monitored simultaneously through conventional pulse current method and a SWCNTs gas sensor, and the measurement results were put together for comparative analysis in this paper. The sensor response showed a great dependence on partial discharge characteristics. The sensor response increased nearly linearly with limits when the energy of discharge was persistently accumulated. Partial discharge power had a great influence on the response rate and the time delay. With the increase of partial discharge power, the response rate augmented almost in proportion while the time delay gradually becomes shorter with limits. The results were quite favorable to assess the partial discharge intensity and duration to some extent. Compared with pulse current method, the sensor was predominant to detect partial discharge exposed to constantly high levels of noise. It was capable of detecting partial discharge which was too weak to be detected with pulse current method. However, the sensor response didn＇t show much dependency on the apparent discharge of partial discharge.

关 键 词：single-walled carbon nanotubes(SWCNTs) gas sensors partial discharge(PD) detection gas insulated switchgear(GIS) tank SF6 decomposition gas PD parameters 

分 类 号：TM595[电气工程—电器] TP212.9[自动化与计算机技术—检测技术与自动化装置]