摘要
针对不同金属材料影响下的SF6火花放电分解特性的系统研究尚不多见,揭示金属材料对SF6火花放电分解特性的影响机理,有助于诊断和评估气体绝缘设备内部火花放电故障涉及何种金属构件。为此开展了不锈钢、铝和铜3种金属材料对SF6火花放电分解特性影响的大量试验,利用气相色谱质谱联用仪对SF6火花放电分解气体进行定量分析,获取不同金属材料下分解气体生成量与火花放电次数的关联特性,并对固体产物进行X射线光电子能谱分析,获得固体产物元素含量和金属存在形式。研究结果表明:不同金属材料下,CF4、SOF2和SOF4的生成量均随火花放电次数的增加呈"线性"上升趋势,而SO2F2和SO2呈"指数"上升趋势;金属材料对CF4生成量的影响程度为Fe>Cu>Al,对含硫气体分解产物生成量的影响程度为Al>Cu>Fe;固体产物中的3种金属元素与钨元素的摩尔比的大小关系为r(Al/W)>r(Cu/W)>r(Fe/W),表明火花放电作用下,相比于Cu和Fe,Al与SF6反应程度最大。
Systematic studies on the decomposition characteristics of SF6 spark discharge under the influence of different metal materials are rarely available in the literature,and the research on the influences of metal materials on the characteristics of SF6 spark discharge decomposition is helpful to diagnose the metal components type involved in spark discharge faults.In this paper,based on an SF6 spark discharge experiment platform,a series tests of SF6 spark discharge decomposition under stainless steel,aluminum and copper were carried out.SF6 spark discharge decomposition gases were analyzed by gas chromatography mass spectrometry to obtain the correlation characteristics between the content of decomposition gases and the number of spark discharges.The solid products were subjected to X-ray photoelectron spectroscopy to obtain the elemental content of the solid products and the presence of the metal.The results show that,under different metal materials,the production amounts of CF4,SOF2 and SOF4 show a‘linear’upward trend with the increase of spark discharge number,while SO2F2 and SO2 show an‘exponential’upward trend.The effect of metal materials on the formation of CF4 is Fe>Cu>Al,as for sulfur-containing gases,the influence law is Al>Cu>Fe.In the solid products,the molar ratio r(Al/W)>r(Cu/W)>r(Fe/W),which indicates that,under the action of spark discharge,Al and SF6 have the greatest degree of reactivity compared with Cu and Fe.
作者
朱宁
唐炬
刘欣
曾福平
姚强
苗玉龙
ZHU Ning;TANG Ju;LIU Xin;ZENG Fuping;YAO Qiang;MIAO Yulong(Kunming Power Supply Bureau,Yunnan Power Grid Limited Liability Company,Kunming 650012,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044 China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;State Grid Chongqing Electric Power Company Electric Power Research Institute,Chongqing 401123 China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第7期2478-2486,共9页
High Voltage Engineering
基金
国家自然科学基金(51537009,51607127)。
关键词
SF6
火花放电
特征分解气体
金属材料
固体产物
SF6
sparks discharge
characteristic decomposition products
metal materials
solid by-products
