基于磁耦合电流转移的阻尼式直流开断技术  

Damping DC Breaking Technology Based on Magnetic Induction Current Commutation

作　　者：吴益飞[1] 肖宇 杨飞[1] 荣命哲[1] 吴翊[1] 申家铭 WU Yifei;XIAO Yu;YANG Fei;RONG Mingzhe;WU Yi;SHEN Jiaming(State Key Laboratory of Electrical Insulation and Power Equipment,Xian Jiaotong University,Xi'an 710049,China)

机构地区：[1]电力设备电气绝缘国家重点实验室,西安交通大学,陕西省西安市710049

出　　处：《电力系统自动化》2022年第13期168-176,共9页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(U1966602);陕西省重点研发计划资助项目(2021GXLH-Z-062)。

摘　　要：直流系统中短路电流上升速度快、峰值高,而未来随着系统电压等级和容量的进一步增加,短路电流开断更为困难。为了降低直流断路器开断要求,在开断过程中考虑故障电流快速抑制是至关重要的,但现有的直流开断方案很难同时兼顾限流和开断过程。文中提出了一种电流转移和阻尼一体的新型直流断路器拓扑结构,该断路器在保证大容量开断和低成本的同时,能实现故障电流的快速限制。首先,对所提出的直流断路器开断原理进行介绍。然后,针对方案中阻尼模块和磁耦合转移模块的关键影响因素展开分析,获得了阻尼模块和磁耦合模块的参数优化设计。最后,基于仿真模型对所提出的开断方案进行了仿真分析,验证了所提出的拓扑结构在不同工况和不同电压等级下的开断适应性,并通过实验验证了所提出的阻尼式直流开断方案的有效性。In the DC system, the short-circuit current rises quickly and the peak value is high. As the voltage level and capacity of the system increase further, the short-circuit current breaking becomes a greater challenge. To reduce the breaking requirements of DC circuit breakers(DCCBs), it is crucial to consider fast fault current limiting in the breaking process. But it is difficult to combine both current limiting and breaking processes in existing DC breaking schemes. In this paper, a new DC circuit breaker topology with integrated current transfer and damping is proposed, which can achieve rapid fault current limiting while ensuring high breaking capacity and low cost. Firstly, the breaking principle of the proposed DCCB is introduced. Then the key influencing factors of the damping module and magnetic coupling transfer module are analyzed to obtain the optimal design of the parameters of the damping module and magnetic coupling module. Finally, based on the simulation model, the proposed breaking scheme is simulated and the breaking adaptability of the proposed topology under different operation conditions and on different voltage levels is verified. The effectiveness of the proposed damping DC breaking scheme is verified through experiments.

关 键 词：直流断路器 阻尼式开断 磁耦合转移 故障限流 

分 类 号：TM561[电气工程—电器] TM721.1