考虑微水微氧下的SF_(6)/N_(2)混合气体电晕分解特性实验研究  

Experimental Study on Corona Decomposition Characteristics of SF_(6)/N_(2) Mixed Gas with Micro-water and Micro-Oxygen

作　　者：王永奇 陈宏刚 樊新鸿 张正渊 赵睿 景瑞斌 马玲 WANG Yongqi;CHEN Honggang;FAN Xinhong;ZHANG Zhengyuan;ZHAO Rui;JING Ruibin;MA Ling(State Grid Gansu Electric Power Company Electric Power Science Research Institute,Lanzhou 730046,China)

机构地区：[1]国网甘肃省电力公司电力科学院,兰州730046

出　　处：《高压电器》2024年第9期77-84,98,共9页High Voltage Apparatus

基　　金：国网甘肃省电力有限公司科技项目(52272223001H)。

摘　　要：SF_(6)目前是使用最广泛的绝缘气体,但SF_(6)的GWP极高且不易降解,使用SF_(6)/N_(2)混合气体可以有效减少SF_(6)的使用从而降低温室效应的影响。因此,文中开展了考虑微水微氧下的SF_(6)/N_(2)混合气体电晕放电分解实验,利用色谱仪对产物进行检测并分析产物特体积分数变化趋势,得出不同外界条件对分解产物的影响规律。实验结果表明:SF_(6)/N_(2)混合气体在电晕放电下的分解产物中SO_(2)F_(2)与SOF_(2)随时间具有明显的线性增加趋势,CO与CH_(4)的体积分数与放电时间无明显变化趋势,CO_(2)、N_(2)O、NF_(3)、SO_(2)与H_(2)S随着放电时间小幅增加,但相较于SOF_(2)与SO_(2)F_(2)变化规律不明显。电压升高后,电晕放电能量会得到提升,进而促进SF_(6)/N_(2)混合气体的分解作用;气压的增加会抑制SF_(6)/N_(2)的分解;微水或微氧含量增加均会使得SO_(2)F_(2)与SOF_(2)的体积分数增加,对于SO_(2)、CO_(2)、NF_(3)、H_(2)S和N_(2)O的影响不明显。文中实验结果为SF_(6)/N_(2)混合气体绝缘设备内部故障的快速识别与响应奠定了基础。SF_(6) is currently the most widely used insulating gas,but the GWP of SF_(6) is extremely high and not easy to be degraded,the use of SF_(6)/N_(2) gas mixture can effectively reduce the use of SF_(6) and thus reduce the impact of greenhouse effect.Therefore,this paper carries out the corona discharge decomposition experiment of SF_(6)/N_(2) gas mixture under the consideration of micro-water and micro-Oxygen,detects the products and analyzes the trend of content change by using chromatography,and draws out the influence law of different external conditions on the decomposition products.The experimental results show that:SF_(6)/N_(2) gas mixture decomposition products under corona discharge in SO_(2)F_(2) and SOF_(2) with time has an obvious linear increase trend,CO and CH_(4) volume fraction and discharge time has no obvious change trend,CO_(2),N_(2)O,NF_(3),SO_(2) and H_(2)S with the discharge time increased slightly,but compared with SOF_(2and) SO_(2)F_(2) change rule is not obvious.After the voltage is increased,the corona discharge energy will be enhanced,which will promote the decomposition of SF_(6)/N_(2) gas mixture.The increase of air pressure will inhibit the decomposition of SF_(6)/N_(2).The increase of micro-water or micro-Oxygen content will make the volume fraction of SO_(2)F_(2) and SOF_(2)increase,and the effect on SO_(2),CO_(2),NF_(3),H_(2)S and N_(2)O is not obvious.The experimental results of this paper lay a foundation for the rapid identification and response of internal faults of SF_(6)/N_(2) mixed gas insulation equipment.

关 键 词：电晕放电 SF_(6)/N_(2)混合气体 分解特性 微水微氧 

分 类 号：TM213[一般工业技术—材料科学与工程]