工频交流电晕放电下SF_6气体分解物形成的影响因素  

Influence Factors of Formation of Decomposition By-Products of SF_6 in 50Hz AC Corona Discharge

作　　者：林涛[1,2] 韩冬[1] 钟海峰[1,2] 靳骁 张国强[1] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院大学,北京100039

出　　处：《电工技术学报》2014年第2期219-225,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51007086);中国科学院电工研究所科研基金资助项目

摘　　要：六氟化硫(SF6)作为一种理想的绝缘和灭弧气体广泛应用于气体绝缘电力设备。以往的研究和运行经验表明SF6气体分解物与电力设备的绝缘状态有密切的关联。因此,分析SF6气体分解物是监测气体绝缘电力设备绝缘状态的有效手段之一。本文用针-板电极模型模拟SF6气体中的工频交流电晕放电,以色谱-质谱法作为检测手段,研究不同影响因素下工频交流电晕放电中SF6气体分解组分的形成规律,如持续施加电压、放电时间、气体压力、电极间距等,分析影响因素对SF6气体分解物形成的作用规律。As an excellent insulating medium, sulfur hexafluoride （SF6） is widely used in gas-insulated apparatus. Previous studies and actual operation experiences have shown that the insulation condition of gas-insulated apparatus can be assessed via decomposition by-products of SF6. Therefore, the analysis on gaseous by-products is one of the most effective ways in monitoring the insulation condition of gas-insulated apparatus. In this paper, by virtue of the gas chromatograph-mass spectrometer system, the qualitative as well as quantitative results of SF6 decomposition by-products are presented in 50Hz AC point-plane corona discharge. Meanwhile, the influence factors on the formation of decomposition by-products are discussed, such as applied voltage, duration of discharge, gas pressure and distance between point and plane as so on.

关 键 词：六氟化硫 电晕放电 SF6气体分解物 色谱-质谱法 SF6 DECOMPOSITION by-products of SF6 

分 类 号：TM835[电气工程—高电压与绝缘技术]