中文摘要：

随着分布式电源技术的发展,直流微网是未来发展的新方向,应用于直流微网快速保护的直流断路器是推动微网发展的关键技术。为此根据直流微网的保护要求提出了一种快速保护的混合式零电压开关（ZVS）直流断路器总体方案,设计了混合式直流断路器的结构和控制系统,并对其关键技术：基于快速斥力机构的真空开关,IGBTs并联技术和限压技术展开了研究。最后基于Mayr电弧模型和真空开关电弧电压建立了ZVS混合式直流断路器的仿真模型,仿真得到了混合式断路器的电流转移特性和开断配合特性。最后根据研究结论,综合得到了400 V/2 500 A开断电流10 k A,闭合时间200μs,开断故障电流时间〈2 ms的混合式直流断路器总体方案。

英文摘要：

With the development of distributed energy resource（DRE）, DC microgrid becomes a future direction. The key technology for promoting DC microgrid is its DC switch. Hence, according to the protection requirements of DC microgrid, we put forward an overall plan of zero-voltage-switch （ZVS） hybrid DC switch for rapid protection. The structure and control system of the hybrid DC switch were designed. Three crucial technologies of ZVS hybrid DC switch, namely, the high-speed vacuum switch structure based on electromagnetic repulsion driving mechanism, the parallel technique of IGBTs, and the voltage limiting, were studied through numerical simulations. The simulation model of ZVS hybrid DC switch was established by synthesizing the Mayr arc model and the arc voltage model of axial magnetic field （AMF） va- cuum interrupter. Then current transfer characteristics and breaking matching characteristics of the switch were obtained. Using the obtained results, we have obtained an overall plan of the ZVS hybrid DC switch, which has capacity of 400 V/2 500 A, breaking current of 10 kA, closing time of 200us, and opening time less than 2 ms.