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气体绝缘组合电器(gas insulated switchgear,GIS)的局部放电检测和气体组分分析,对设备运行状态的诊断和评估有着重要的意义。提出一种新的SF6气体中局部放电产生的分解气体检测方法,并研制用于检测SF6局部放电的多壁碳纳米管薄膜传感器。采用一种混酸修饰方法实现了对碳纳米管的官能化修饰,对修饰前后的碳纳米管进行了透射电镜和红外光谱分析。在实验室采用SF6气体分解组分试验装置,对研制的多壁碳纳米管薄膜传感器进行了分解气体检测试验,试验结果表明,研制的MWNTs传感器缺陷多,并含有活性官能团,对SF6气体分解组分吸附能力强,表现出良好的灵敏度和快速响应特性,能反映出分解气体组分的总体情况。
Partial discharge detection and gas composition analysis of gas insulated switchgear (GIS) are of great significance for the diagnosis and evaluation of equipment operation status. A new gas detection method for partial discharge in SF6 gas was proposed and a multi-walled carbon nanotube thin film sensor for detecting SF6 partial discharge was developed. A mixed acid modification method was used to realize the functional modification of carbon nanotubes. The carbon nanotubes before and after modification were characterized by transmission electron microscopy and infrared spectroscopy. In the laboratory using SF6 gas decomposition component test device, the developed multi-walled carbon nanotube thin film sensor gas decomposition experiments were carried out, the test results show that the MWNTs sensor developed defects and contain active functional groups, SF6 gas decomposition group Strong adsorption capacity, showing good sensitivity and rapid response characteristics, can reflect the overall situation of the decomposition of gas components.