中文摘要：

直流断路器的故障切除时间主要决定于关键元件超快速隔离开关的动作时间。文中对超快速隔离开关的电磁斥力机构工作原理进行研究,得到建立电磁斥力机构的有限元模型。仿真分析线圈参数、金属盘尺寸等因素对超快速隔离开关动态特性的影响,在此基础上对电磁斥力机构参数进行优化。最后对设计超快速隔离开关进行动态特性测试,测试结果表明设计的电磁斥力机构能满足超快速隔离开关2 ms运动到耐受故障切除过程中的暂态开断电压TIV的绝缘距离要求,验证了设计的有效性,为混合式高压直流断路器的实现提供了保证。

英文摘要：

In a HVDC circuit breaker system, total fault clearing time is mainly dependent on the reaction time of the ultra-fast disconnect switch （UFDS）. Based on the principle of electromagnetic repulsion mechanism （ERM） of UFDS, the finite element model of electromagnetic repulsion mechanism is established in this paper. In addi- tion, by means of systematic and comprehensive simulations, the influence of the parameters of the coil and the size of the metal plate on the dynamic characteristics of UFDS is simulated and analyzed, and based on this the parameters of ERM are optimized. Finally, a prototype of UFDS based on ERM is built. A series dynamic charac- teristic test results show that the designed ERM can meet the requirements of transient interrupt voltage （TIV） in- sulation distance during the fault cleaning process UFDS 2 ms. According to the experiment results, the simulation results are in good agreement with the experimental observations, which guarantee for the realization of hybrid HVDC CB.