电器与能效管理技术Issue(3)：1-5,30,6.DOI:10.16628/j.cnki.2095-8188.2025.03.001
大容量自能式断路器开断过程多阀片运动特性研究
Study on Motion Characteristics of Multiple Valves During Breaking Process of Large-Capacity Self-Blast Circuit Breaker
摘要
Abstract
The rated short-circuit breaking current of 550 kV switches in China urgently needs to be increased from 63 kA to 80 kA.Moreover,the self-blast circuit breakers have great advantages in large-capacity breaking.By constructing a magnetohydrodynamics model considering the continuous motion of multiple valves,a simulation analysis of the arc breaking process for a 550 kV self-blast circuit breaker under short-circuit currents of 63 kA and 80 kA is carried out.The force and motion characteristics of the check valve,the gas return valve and the pressure relief valve are obtained.The study shows that the force characteristics of each valve are similar under different short-circuit currents.The larger the short-circuit current is,the earlier the closing time of the check valve is,the higher its motion speed is,with a peak value of 25.5 m/s,and the more sufficient the mixing of hot and cold gases in the expansion chamber is.The gas return valve remains stationary relative to the right side wall during the arcing stage.The pressure relief valve makes a reciprocating motion on the right side of the initial position after 3.90 ms of arcing,and the farthest distance can reach 339.54 mm.关键词
大容量/自能式断路器/磁流体动力学/电弧开断/阀片Key words
large-capacity/self-blast circuit breaker/magnetohydrodynamics/arc breaking/valve分类
动力与电气工程引用本文复制引用
陈诗哲,王周晶,石钰莹,牟禹泽,李兴文..大容量自能式断路器开断过程多阀片运动特性研究[J].电器与能效管理技术,2025,(3):1-5,30,6.基金项目
陕西省科技计划项目(2022TD-59) （2022TD-59）
