SF_6新气痕量杂质对SF_6电气设备寿命的影响  

Influence of Trace Impurities from SF_6 New Gas on the Life of SF_6-insulating Electrical Equipment

作　　者：裘吟君 袁静帆[2] 陈晓琳 

机构地区：[1]海南电力技术研究院,海口570203 [2]海南电网公司,海口570203

出　　处：《高电压技术》2013年第2期360-364,共5页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724506)~~

摘　　要：为了给电气设备中的SF6新气质量控制提供参考,研究了SF6新气中痕量杂质对电气设备运行寿命的影响。通过一个与电流互感器共气室的直线隔离开关装置,模拟了中心导杆上金属尖端放电内部缺陷。在220kV单电压和220kV、3 150A同步升流升压2种方式下,分别充入不同品质的SF6新气进行约100h的试验。并采用SF6气相色谱质谱分析技术、加拿大SF6杂质分析仪DPD,跟踪检测SF6气体痕量杂质各组分体积分数变化情况。结果表明,设备中充入低品质SF6新气(含有较高浓度的全氟烷烃、氟化硫酰、及碳硫氟化物等多种杂质),在放电末期产生较多的SO2F2、SOF2和SO2。而酸性的SO2对设备具有腐蚀作用,因此,当SF6新气中痕量杂质过高时,其充入电气设备后,将减少SF6电气设备运行寿命,尤其是开断设备。In order to provide references for quality control of new SF6 gas in electrical equipment,the influence of trace impurities in new SF6 gases on SF6-insulating electrical equipment was experimentally investigated.An internal default as metal point discharge on the center rod was simulated by using a straight-line isolator installment which shared gas chamber with a current transformer.Then experiments of using SF6 new gas with various qualities under 2 voltage modes,single 220 kV single voltage mode and 220 kV/3 150 A synchronous upward current-voltage mode,were performed for about 100 h.In the experiments,variations of volume concentration of each impurity in the SF6 gases were detected by a gas chromatography mass spectrometry analyzer and a DPD SF6 impurity analyzer（made in Canada）.The results show that,more by-products like SO2F2,SOF2,and SO2 will be generated when electrical equipment is filled with new SF6 gas which has mass trace impurities,including fluorinated alkane,fluorizating sulfonyl,and carbon sulfur fluoride;considering the corrosive effect of SO2 on the equipment,it is concluded that when SF6 is filled with new gas with high level impurities,the life of electrical equipment will be shortened,especially that of breaks will be shortened.

关 键 词：SF6新气 痕量 杂质 质谱检测 SF6电气设备 寿命影响 

分 类 号：TM506[电气工程—电器]