摘要
SF_(6)气体绝缘开关设备电弧放电下O_(2)对SF_(6)分解产物具有显著影响,但其影响规律及相关作用机制目前尚不清楚。针对这一问题,文中利用^(18)O_(2)作为示踪剂开展了电弧放电实验,利用GC⁃MS分析了放电过程中和放电后含^(18)O同位素物质的变化规律,明确了电弧放电下SF_(6)分解产物的形成途径及^(18)O_(2)对SF_(6)分解产物的影响,阐明了其深层化学反应机理。结果表明,电弧放电下O_(2)杂质会在不同程度上促进SOF_(2)、SO_(2)、SO_(2)F_(2)、CO_(2)的生成,其中O_(2)主要以分解后的O原子参与SOF_(2)、SO_(2)、CO_(2)的生成反应,以O_(2)分子和分解后的O原子共同参与SO_(2)F_(2)的生成反应。SOF_(2)和SO_(2)F_(2)的生成主要由放电过程中发生的复合反应主导,SO_(2)的生成主要由放电后发生的分子间反应主导,CO_(2)的生成则来自两者的共同作用。
O_(2)has a significant influence on SF_(6)decomposition products under the arc discharge of SF_(6)gas insulated switchgear,but its influence and related action mechanism are unclear for now.To this problem,the arc discharge experiments using^(18)O_(2)as a tracer is performed in this paper,the variation of^(18)O isotopic substances during and after discharge by GC⁃MS is analyzed,the generation path of SF_(6)decomposition products under arc discharge and the in⁃fluence of^(18)O_(2)on SF_(6)decomposition products are defined as well as its deep chemical reaction mechanism is clari⁃fied.The results show that under arc discharge,O_(2)impurities will promote generation of SOF_(2),SO_(2),SO_(2)F_(2),and CO_(2)to varying degrees,in which O_(2)mainly participates in the generation reactions of SOF_(2),SO_(2),and CO_(2)in the form of decomposed O atoms,and participates in the generation reactions of SO_(2)F_(2)in the form of both O_(2)molecules and de⁃composed O atoms.The generation of SOF_(2)and SO_(2)F_(2)is mainly dominated by the composite reactions during the dis⁃charge,while the generation of SO_(2)is mainly dominated by the intermolecular reactions after the discharge.And the generation of CO_(2)comes from the combination of the two aspects.
作者
张振乾
杨韧
徐留玉
徐孟元
高超
李小全
张万军
ZHANG Zhenqian;YANG Ren;XU Liuyu;XU Mengyuan;GAO Chao;LI Xiaoquan;ZHANG Wanjun(China Electric Power Research Institute,Beijing 100192,China;State Grid Shaanxi Electric Power Research Institute,Xi’an 710100,China;Shandong Taikai High Voltage Switchgear Co.,Ltd.,Shangdong Tai’an 271000,China)
出处
《高压电器》
CAS
CSCD
北大核心
2024年第2期192-199,共8页
High Voltage Apparatus
关键词
SF_(6)分解产物
电弧放电
影响规律
氧同位素示踪法
SF_(6)decomposition products
arc discharge
influence characteristics
oxygen isotope tracer method
