| 引用本文: | 戴志辉,石浚阳,史 琛,等.基于限流式潮流控制器的柔直配电系统故障穿越与恢复方案[J].电力系统保护与控制,2025,53(20):34-45.[点击复制] |
| DAI Zhihui,SHI Junyang,SHI Chen,et al.A fault ride-through and recovery scheme for flexible DC distribution systems based on current limiting power flow controllers[J].Power System Protection and Control,2025,53(20):34-45[点击复制] |
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| 摘要: |
| 针对复杂柔直配电系统模块化多电平换流器(modular multi-level converter, MMC)易受故障电流冲击导致闭锁及故障清除后非故障线路潮流过载问题，提出一种基于限流式潮流控制器的复杂柔直配电系统故障穿越与恢复方案。首先，分析了限流式潮流控制器的拓扑结构及工作原理。然后，从源侧与网侧协同限流的角度，提出故障期间MMC无闭锁穿越方案，在保证故障清除选择性的同时为故障识别预留时间裕度。故障清除后通过潮流控制实现功率快速平衡，满足多支路供电需求。最后，在PSCAD/EMTDC建立复杂环状柔直配电网模型并进行仿真分析，验证了所提方案具备良好的穿越能力，且满足实用性与可拓展性。 |
| 关键词: 无闭锁故障穿越 限流式潮流控制器 柔直配电网 源网协同 稳态恢复 |
| DOI：10.19783/j.cnki.pspc.241683 |
| 投稿时间：2024-12-17修订日期：2025-03-18 |
| 基金项目:河北省自然科学基金项目资助(E2024502043) |
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| A fault ride-through and recovery scheme for flexible DC distribution systems based on current limiting power flow controllers |
| DAI Zhihui,SHI Junyang,SHI Chen,JIANG Ying,YANG Yishi,LI Hengze |
| (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 in complex modular multilevel converter (MMC)-based DC distribution systems, specifically, converter blocking caused by fault current surges and post-fault power flow overload in non-faulted lines, this paper proposes a fault ride-through and recovery scheme based on a current limiting power flow controller. First, the topological structure and operational principles of the current limiting power flow controller are analyzed. Second, from the perspective of collaborative current limiting between the source side and the network side, a non-blocking fault ride-through scheme for MMC is proposed. This approach ensures selective fault clearance while providing adequate time margin for fault identification. After fault clearance, the scheme enables rapid power balance via adaptive power flow control, effectively meeting the supply demands of multiple feeders. Finally, a complex ring-type flexible DC distribution network model is established in PSCAD/EMTDC for simulation analysis. The results verify that the proposed scheme offers excellent fault ride-through capability and meets both practicality and scalability requirements. |
| Key words: non-blocking fault ride-through current limiting power flow controller flexible DC distribution network generation-grid coordination steady-state recovery |
