高压电器2013，Vol.49Issue(1)：13-17,23,6.
一种新型碳纳米管气体传感器的响应特性研究
Response Characteristics of a New-style Carbon Nanotubes (CNTs) Gas Sensor
摘要
Abstract
The technology for detecting decomposition products of SF6 based on carbon nanotubes (CNTs) gas sensor can effectively diagnose the partial discharge (PD) caused by insulation defect in GIS. In this study, the responses of the CNTs gas sensor to four standard gases, i.e. HF, SO2F2, SOF2/S2OF10, and SO2, were measured, and an experimental system was set up, which consists of a GIS simulation device, a PD detection instrument based on pulse current method, and a CNTs gas sensor. Then, the decomposition gas of SF6 resulting from PD was measured by the CNTs gas sensor, the variation of conductance of the gas sensor with PD was obtained, and the repeatability of the gas sensor's response was analyzed. The results show that the gas sensor displays significant response characteristics in SO2F2 and SOF2/S2OF10 gases, and it is more sensitive to SO2F2. However, SO2 and HF induce little change in the conductance of the sensor. The sensor exhibits clear response to the PD generated by point-plane electrode model. Furthermore, the conductance of the gas sensor increases gradually within the duration of PD, and its response increases almost linearly with the accumulation of partial discharge energy until gets saturation. The gas sensor shows good repeatability with the difference between two measurements less than 0.5%. The analyses of gas chromatography and infrared spectroscopy on decomposition products of SF6 verify the correctness of the proposed gas sensor.关键词
碳纳米管/SF6分解/气体传感器/响应特性Key words
carbon nanotubes/SF6 decomposition/gas sensor/response characteristics分类
信息技术与安全科学引用本文复制引用
马奎,王博,魏宁,周文武,王圆圆,丁卫东,汲胜昌..一种新型碳纳米管气体传感器的响应特性研究[J].高压电器,2013,49(1):13-17,23,6.基金项目
国家自然科学基金资助项目(50707023). （50707023）
