摘要
SF_(6)气体由于其优秀的绝缘和灭弧性能而被广泛应用于高压电力开关设备中。但是,SF_(6)是一种强温室效应的气体,因此,研究以氟化腈(C_(4)F_(7)N)气体为代表的新型环保气体作为SF_(6)的替代气体成为了目前高压电器领域的热点问题。文中针对126 kV隔离开关结构,建立了燃弧过程的磁流体动力学模型,采用SF_(6)气体和C_(4)F_(7)N/CO_(2)混合气体的真实气体模型,对比研究了SF_(6)和C_(4)F_(7)N/CO_(2)混合气体在不同充气压力和触头运动速度下的燃弧过程。建立了弧后电击穿的评估方法,针对C_(4)F_(7)N/CO_(2)混合气体在隔离开关结构下弧后的温度及气压分布,预测了弧后最有可能发生电击穿的区域。文中的结果可以为新型环保气体在隔离开关设备中的应用和优化设计提供参考。
SF_(6)gas is used widely in high voltage switchgear due to its excellent insulation and arc interruption performance.However,SF_(6)is a kind of gas with strong greenhouse effect.Therefore,the study of new environmentfriendly gases represented by perfluoronitrile(C_(4)F_(7)N)gas as a alternative gas to SF_(6)has become a hot topic in the field of high-voltage electrical apparatus.In view of the structure of 126 kV disconnector in this paper,the magnetohydro-dynamic model of arcing process is set up.The real gas model of SF_(6)gas and C_(4)F_(7)N/CO_(2)gas mixture is adopted and the arcing process of SF_(6)gas and C_(4)F_(7)N/CO_(2)gas mixture at different gas filling pressure pressures and contact velocity is compared and studied.The evaluation method of post arc electric breakdown is established.In view of post arc temperature and gas pressure distribution of C_(4)F_(7)N/CO_(2)gas mixture at structure of disconnector,the most likely area of post-arc electric breakdown is predicted.The result in this paper can provide reference for the application and optimal design of of new environmental gas in disconnector.
作者
傅明利
王勇
卓然
王炜
王邸博
宋浩永
FU Mingli;WANG Yong;ZHUO Ran;WANG Wei;WANG Dibo;SONG Haoyong(CSG Electric Power Research Institute Co.,Guangzhou 510663,China;United Laboratory of Advanced Electrical Materials and Equipment Support Technology,CSG.,Guangzhou 510663,China;Guangzhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Guangzhou 510000,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第3期41-47,共7页
High Voltage Apparatus
基金
南方电网公司科技项目资助(ZBKJXM20190087)。
