【摘要】 相较于全控器件，晶闸管在损耗、成本及耐浪涌电流等方面具有优势，利用其设计直流断路器已经成为一种趋势。针对现存晶闸管型固态式直流断路器普遍存在可控性差、可靠性低、导通损耗高以及无法满足重合闸需求等问题，提出一种具备快速重合闸能力的固态式直流断路器。首先，介绍了拓扑的电路结构和工作原理，建立了断路器数学模型并给出各元器件的参数设计原则。然后，与现有方案进行性能和经济对比，通过仿真分析了各方案中关键元器件的电气应力。最后，搭建了断路器样机实验测试平台。实验结果表明，所提拓扑能够可靠开断故障电流，并有效保证了直流系统重合闸安全。更多还原

【Abstract】 Compared to fully controlled semiconductor devices, thyristors offer advantages in terms of power loss, cost,and surge current tolerance, making them an increasingly popular choice for designing DC circuit breakers. To address the common issues found in existing thyristor solid-state DC circuit breakers, such as poor controllability, low reliability, high conduction losses, and the inability to meet reclosing requirements, a new solid-state DC circuit breakers with fast reclosing capability is proposed. First, the circuit structure and working principle are introduced, and then the mathematical models are established and the parameter design principles of each component are provided. Next, the performance and cost of the topology are compared with the existing schemes, and the electrical stress of the key components in each scheme is analyzed through simulation. Finally, a prototype testing platform is built. Experimental results show that the proposed topology can reliably interrupt fault current, and effectively ensure the safe reclosing in DC systems.更多还原