中文摘要：

文中提出了一种新型的基于超导限流技术的自激型直流断路器,该断路器由超导限流模块和直流开断模块组成。笔者的研究目标是分析直流开断模块的自激开断过程以及相关参数对开断过程的影响,验证原理可行性。文中研究了该超导限流式直流断路器在不同额定电压下（10、100、320 k V）开断的可行性。通过研究10 k V的额定电压下交换回路参数和电弧参数对开断特性的影响,100 k V额定电压下仿真开断模型工作过程,320 k V下限流模块和开断模块配合原理,得出该直流断路器原理可行。开断的时间随着电容值和电弧功率损耗因数的增大而减少,随着电感值和电弧时间常数的减小而降低;限流模块和开断模块可以很好的配合;此断路器能在不同电压等级下实现短路电流的开断。

英文摘要：

This paper proposes a new type self-excided DC circuit breaker （DCCB） based on superconductingcurrent-limiting technology. The DCCB combines superconducting current-limiting module and DC interruptingmodule together. This paper analyzes the self-excited interrupting process of DC interrupting module, the influenceof each parameter on interrupting process and feasibility of interruption principle. This paper analyzes the in-terrupting feasibility under different rated voltage（10, 100, 320 kV）. The feasibility of the DCCB is proved by ana-lyzing commutation circuit parameters and arc parameters that effects on DC interrupting under 10 kV, DC in-ter-rupting process under 100 kV and coordination between current-limiting module and interrupting module under320 kV. Simulation results show that the interrupting time decreases with the increase of capacitance and arc pow-er loss factor; and decreases with the decrease of inductance and arc time constant. It is proved that current-limit-ing module and interrupting module cooperate well. The proposed DCCB can achieve interrupting short-circuitcurrent under different voltage levels.