用于直流应用的混合式断路器

Yang Bingjian, Gao Yang, W. Xiaoguang, H. Zhiyuan, Chen Long-long, Shang Yunhai
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引用次数: 33

摘要

大型直流微电网和高压直流电网的发展需要一种可靠、快速、低损耗的断路器。尽管直流电网具有损耗低、无功功率等优点,但在控制和开关动作方面存在较大的缺点。本文提出了一种新型强制换相混合断路器,该断路器能在几毫秒内中断故障电流。此外,该拓扑结构实现了机械开关的零电流开路,即使半导体器件的栅极驱动器突然断电,断路器也能保持导通状态。该断路器既适用于直流直流系统,也适用于直流微电网。提出了混合断路器的设计原则,并通过仿真结果进行了验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A hybrid circuit breaker for DC-application
The development of large scale DC microgrid and high voltage direct current (HVDC) power grid requires a reliable, fast and low-loss circuit breaker. In spite of the advantages of DC gird such as low loss and no reactive power, DC grid has major disadvantages concerning control and switch actions. A new hybrid breaker with forced commutation is proposed in this paper, which is able to interrupt the fault current in several milliseconds. Furthermore, zero-current open of mechanical switch is achieved in this topology, and the breaker could be maintained in conducting state even if the gate driver of the semiconductor devices suddenly experiences blackout. The breaker can be applied in both VSC-HVDC system and DC micro grid. The design principles of the proposed hybrid breaker are presented and verified by simulation results.
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