双断口真空断路器开断速度对电压分布的影响  

Effect of Opening Speed on Voltage Distribution of Double-break Vacuum Circuit Breaker

作　　者：张豪 符一凡 董华庆 陈占清 廖敏夫[1] ZHANG Hao;FU Yifan;DONG Huaqing;CHEN Zhanqing;LIAO Minfu(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,Liaoning Province,China)

机构地区：[1]大连理工大学电气工程学院,辽宁省大连市116024

出　　处：《电网技术》2021年第6期2427-2432,共6页Power System Technology

基　　金：国家自然科学基金项目(51777025);中央高校基本科研业务费资金项目(DUT19ZD219)。

摘　　要：多断口真空间隙串联可以充分发挥真空短间隙绝缘恢复速度快、低碳环保等优点,但存在断口电压分布不均的问题,在断口两端并联过大的均压电容会增加弧后电流,限制双断口真空开关的开断能力。该文旨在寻找一种自均压方式,减少均压电容的使用。研究了双断口串联真空间隙两组触头在相同的真空环境下,燃弧期间开断速度对电压分布的影响机理。设计了双断口可拆式真空灭弧室,采用Maxwell电磁仿真软件,对静态情况下的电压分布进行了仿真。搭建了单腔体双断口真空断路器合成回路实验平台,对双断口相同速度和不同速度开断过程的断口电压分布进行了实验研究。实验结果表明,改变开断速度能改善高双断口真空断路器电压分布均匀性,为提高双断口真空断路器开断能力提供了借鉴。The advantages of the short vacuum gap,such as fast insulation recovery and low carbon emissions,can be fully developed by multi breaks in series.However,there is a problem of uneven voltage distribution on the breaks.Too high grading capacitance on both ends of the interrupter will increase the post-arc current and limit the breaking capacity of the double-break vacuum switch.The purpose of this paper is to find a self grading method to reduce the use of grading capacitors.The influence of different breaking speeds on the voltage distribution during the arcing phase is studied in the condition that two sets of contacts in the same vacuum environment.A double-break detachable vacuum interrupter is designed.The voltage distribution is simulated with Maxwell at a static state.A synthetic loop experimental platform for double-break vacuum circuit breaker with one chamber was built.The voltage distributions in different breaking processes are tested,including double-break opening at the same or different speeds.The experimental results show that different speed breaking can improve the voltage distribution uniformity of the double-break vacuum circuit breaker,which provides a reference for improving the breaking capacity of the double-break vacuum circuit breaker.

关 键 词：双断口真空断路器 可拆式真空灭弧室 开断速度 电压分布 

分 类 号：TM721[电气工程—电力系统及自动化]