计及柔性限流装置与直流断路器协同动作的电弧抑制暂态特性研究  

Research on transient characteristic of arc suppression considering the joint operation of a flexible current limiting device and a DC circuit breaker

作　　者：郑峰 王威东 刘宝谨 刘莞玲 梁宁[3] ZHENG Feng;WANG Weidong;LIU Baojin;LIU Wanling;LIANG Ning(School of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;College of Computer and Data Science,Fuzhou University,Fuzhou 350108,China;Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]福州大学计算机与大数据学院,福建福州350108 [3]昆明理工大学电力工程学院,云南昆明650500

出　　处：《电力系统保护与控制》2024年第2期59-69,共11页Power System Protection and Control

基　　金：国家自然科学基金项目资助(52167010)。

摘　　要：直流系统的故障隔离是保证直流系统稳定运行的重要技术。针对传统故障隔离策略对直流断路器(direct current circuit breaker, DCCB)的性能要求较高的问题,提出了一种利用柔性限流装置(flexible current limiting device,FCLD)与DCCB协同动作的故障隔离策略。首先,研究了直流系统永久性故障和瞬时性故障情况下FCLD与DCCB的协同作用机理。其次,分析考虑FCLD电流抑制作用下DCCB开断过程的电弧暂态特性。最后,在Matlab/Simulink平台中进行仿真,验证所提协同策略的可行性。结果表明:FCLD可有效抑制DCCB的开断电弧;基于所提故障隔离策略,直流系统可在瞬时故障情况下实现平稳穿越,永久故障情况下实现DCCB的无弧开断。该策略降低了直流系统故障隔离过程中对DCCB的开断要求,提升了直流系统的故障穿越能力。Fault isolation is an important technology to help guarantee that a DC system can be operated stably.A new fault isolation strategy is proposed to improve the traditional strategy which relies too much on a high-performance DC circuit breaker(DCCB).The new strategy makes use of the coordination between a flexible current limiting device(FCLD)and a DCCB.First,the cooperative mechanism between the FCLD and DCCB under permanent fault and transient fault is researched.Second,the arc transient characteristic of the interruption of the DCCB considering suppressed current from the FCLD is analyzed.Finally,a simulation is carried out on the Matlab/Simulink platform to verify the feasibility of the new cooperative strategy.The results show that FCLD can inhibit the breaking arc effectively;with this new fault isolation strategy,the DC system can finish ride through smoothly in the transient fault,while the DCCB can complete the no arc break in the permanent fault.The new strategy has reduced the breaking requirements for DCCB in terms of the DC system’s fault isolation,and improved the fault ride-through capability of the DC system.

关 键 词：直流系统 柔性限流装置 直流断路器 故障隔离策略 协同配合 

分 类 号：TM561[电气工程—电器] TM721.1