Damping HVDC Circuit Breaker With Current Commutation and Limiting Integrated
Damping HVDC Circuit Breaker With Current Commutation and Limiting Integrated
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DOI：
10.1109/tie.2019.2962475
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发表时间：
2020-12
影响因子：
7.7
通讯作者：
Yife Wu;M. Rong;Yi Wu;Fei Yang;Q. Yi
中科院分区：
文献类型：
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作者：
Yife Wu;M. Rong;Yi Wu;Fei Yang;Q. Yi
高压直流电网故障限流是降低直流断路器开断应力、提高开断可靠性的关键。然而，现有的高压直流断路器很少考虑在开断过程中快速限制故障电流。本文提出了一种新型的集换流和阻尼于一体的高压直流断路器，该断路器能在保持大开断能力的同时实现快速限流和开断，且成本较低。对电流换流能力进行了仿真分析，确定了电流阻尼模块的最佳参数。在此基础上，对该断路器的故障电流开断性能进行了理论分析，并与传统的混合式高压直流断路器进行了比较。最后，一个小功率的电流阻尼直流断路器的原型建立和测试，以验证所提出的拓扑结构的有效性。
The fault current limiting in high-voltage dc (HVdc) grids is critical to reducing the breaking stress of dc circuit breaker and improving the breaking reliability. However, the existing HVdc circuit breakers rarely consider the rapid limiting of fault current in the breaking process. In this article, a novel HVdc circuit breaker integrating current commutation and damping is presented, which can realize fast current limiting and interruption while preserving large breaking capability and low cost. Simulation analysis of current commutation capability is carried out to determine the optimal parameters in the current damping module. Then, the fault current breaking performance of the proposed HVdc breaker is evaluated and compared with conventional hybrid HVdc breaker theoretically. Finally, a low-power prototype of the current damping dc breaker is built and tested to verify the validity of the proposed topology.