某型超高压压气式SF_(6)断路器不同燃弧时间对非对称短路电流开断性能影响规律研究  

Study on influence of different arc burning time on breaking performance of asymmetric short circuit current of certain UHV SF_(6)circuit breaker

作　　者：魏莹 王达奇 马飞越 项彬[2] 李龙启 王东宇[2] 杜慧鑫 刘志远[2] WEI Ying;WANG Daqi;MA Feiyue;XIANG Bin;LI Longqi;WANG Dongyu;DU Huixin;LIU Zhiyuan(Electric Power Science Research Institute of Ningxia Electric Power Co.,Ltd.,Yinchuan 750002,China;State Key Laboratory of Electrical Insulation and Power Equipment(Xi’an Jiaotong University),Xi’an 710049,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,宁夏银川750002 [2]电工材料电气绝缘全国重点实验室(西安交通大学),陕西西安710049

出　　处：《电工电能新技术》2025年第2期98-105,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国网宁夏电力有限公司科技项目(5229DK23000B)。

摘　　要：本文基于某型超高压压气式SF_(6)断路器T100a试验,采用纳秒级别的电流零区测量装置,测试超高压压气式SF_(6)断路器的T100a开断试验,研究不同燃弧时间下开断高直流分量非对称短路电流时电弧的关键参数如熄弧尖峰、零前电弧电导、电弧电流等参数的变化规律。同时,基于断路器的内部结构建立气体电弧焓流物理仿真模型,研究不同燃弧时间时的压气室压力与开距变化。研究结果显示,在相同开断电流下以及一定的燃弧时间内,燃弧时间越长,熄弧尖峰越大,零前电弧电导越小。同时,压气室压力和触头开距也随着燃弧时间正向增加,使得断路器开断更容易,为实际应用中SF_(6)断路器开断非对称短路电流提供了理论依据。In this paper,based on the T100a test of a certain type of UHV pneumatic SF_(6)circuit breaker,the T100a breaking test of EHV pneumatic SF_(6)circuit breaker is tested by using a nanosecond current zero zone measuring device.The variation rules of arc key parameters such as arc peak,pre-zero arc conductance and arc current are studied when interrupting high DC component asymmetric short circuit current under different arc time.At the same time,based on the internal structure of the circuit breaker,the physical simulation model of gas arc enthalpy flow is established to study the pressure and distance change of the pressure chamber at different arc times.The results show that under the same on-off current,the longer the arc burning time is,the larger the arc quenching peak is and the smaller the pre-zero arc conductance is.At the same time,the pressure of the compressor chamber and the contact distance also increase positively with the arc time,which makes it easier for the circuit breaker to break,and that provides a theoretical basis for the SF_(6)circuit breaker to break the asymmetric short-circuit current in practical application.

关 键 词：燃弧时间 SF_(6)断路器 T100a试验 开断仿真 

分 类 号：TM5[电气工程—电器]