| 引用本文: | 戴志辉,石浚阳,李毅然,等.基于多端口断路器的柔直配电系统故障性质辨识与恢复方案[J].电力系统保护与控制,2026,54(01):105-116.[点击复制] |
| DAI Zhihui,SHI Junyang,LI Yiran,et al.Fault nature identification and recovery scheme for flexible DC distribution systems based on multi-port circuit breakers[J].Power System Protection and Control,2026,54(01):105-116[点击复制] |
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| 摘要: |
| 针对柔直系统故障后盲目重合闸造成二次过流冲击及故障恢复期间电流波动导致恢复缓慢问题，提出一种基于多端口断路器的柔直配电系统故障性质辨识与恢复方案。首先，分析了集成多功能潮流控制模块的多端口断路器拓扑结构，通过合并功能相同与结构相似的冗余单元，提升设备集成度与经济性。然后，通过控制该模块向故障线路主动注入电流信号辨识故障性质，并构建动态权重可自适应调整的加权组合判据，提高辨识可靠性。故障恢复阶段利用模块自身潮流控制能力削减线路两端换流站出口电压差产生的暂态电流冲击，同时提升系统恢复后对于潮流变化的动态响应能力。最后，在PSCAD/EMTDC建立环状柔直配电网模型进行仿真分析，验证所提方案具有故障辨识可靠性高、功能集成度好、适用场景广泛等优点。 |
| 关键词: 故障性质辨识 故障恢复 多功能潮流控制模块 多端口直流断路器 柔直配电系统 |
| DOI：10.19783/j.cnki.pspc.250316 |
| 投稿时间：2025-03-27修订日期：2025-08-20 |
| 基金项目:河北省自然科学基金项目资助(E2024502043) |
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| Fault nature identification and recovery scheme for flexible DC distribution systems based on multi-port circuit breakers |
| DAI Zhihui,SHI Junyang,LI Yiran,LI Hanwei,ZHANG Xuanyi,YANG Chunhao |
| (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
(North China Electric Power University), Baoding 071003, China) |
| Abstract: |
| To address the issues of secondary overcurrent impacts caused by blind reclosing after faults in flexible DC distribution systems, as well as slow recovery due to current fluctuations during the fault recovery process, this paper proposes a fault nature identification and recovery scheme for flexible DC distribution systems based on multi-port circuit breakers. First, the topology of a multi-port circuit breaker integrating a multifunctional power flow control module is analyzed. By merging redundant units with identical functions and similar structures, the integration level and economic performance of the device are improved. Subsequently, by actively injecting current signals into the faulty line through the control of this module, the fault nature is identified, and a dynamically adjustable weighted combination criterion is constructed to enhance identification reliability. During the fault recovery stage, the intrinsic power flow control capability of the module is utilized to suppress the transient current impacts arising from the voltage difference between the converter stations at both ends of the line, while enhancing the system’s dynamic response to power flow changes after recovery. Finally, a ring-type flexible DC distribution network model is established in PSCAD/EMTDC for simulation analysis, verifying that the proposed scheme features high reliability in fault identification, a high level of functional integration and wide applicability. |
| Key words: fault nature identification fault recovery multifunctional power flow control module multi-port DC circuit breaker flexible DC distribution system |
