| 引用本文: | 岳菁鹏,蔡海青,安然然,伍文聪,顾浩瀚.多端口级联多电平型内嵌式直流潮流控制器[J].电力自动化设备,2025,45(12):193-200. |
| YUE Jingpeng,CAI Haiqing,AN Ranran,WU Wencong,GU Haohan.Multi-port cascaded multi-level type embedded DC power flow controller[J].Electric Power Automation Equipment,2025,45(12):193-200. |
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| 摘要: |
| 针对网状高压直流输电系统因线路数量超过可控节点数量导致的潮流控制自由度不足问题，提出一种多端口级联多电平型内嵌式直流潮流控制器(eDCPFC)。该控制器与模块化多电平换流器(MMC)耦合，通过协同控制实现能量平衡，无需额外电源或隔离变压器，实现了多端口潮流的双向灵活调控。针对多端口级联多电平型eDCPFC拓扑结构，提出了eDCPFC与MMC的协同控制、eDCPFC内部子模块能量平衡控制以及基于q轴电压注入的内部环流优化控制策略。全功率仿真结果和小功率样机实验结果验证了所提控制策略的可行性与有效性，所提eDCPFC可以调节多条线路潮流。 |
| 关键词: 网状高压直流输电系统；级联多电平结构；eDCPFC MMC；主动环流注入 |
| DOI：10.16081/j.epae.202508022 |
| 分类号:TM721.1 |
| 基金项目:中国南方电网有限责任公司科技项目(GDKJXM20222204(036100KK5222204))；国家自然科学基金重点资助项目(U23B20123) |
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| Multi-port cascaded multi-level type embedded DC power flow controller |
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YUE Jingpeng1, CAI Haiqing2, AN Ranran1, WU Wencong2, GU Haohan2
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1.Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510062, China;2.Electrical Power Research Institute of China Southern Power Grid Co.,Ltd.,Guangzhou 510663, China
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| Abstract: |
| To address the insufficient power flow controllability in meshed high-voltage DC transmission system caused by the excess of transmission lines over controllable nodes, a multi-port cascaded multi-level type embedded DC power flow controller(eDCPFC) is proposed. The controller is coupled with the modular multi-level converter(MMC),where coordinated control is implemented to maintain energy balance without requiring additional power supplies or isolation transformers, thereby enabling bidirectional power flow regulation across multiple ports. For the multi-port cascaded multi-level type eDCPFC topology structure, the coordinated control between eDCPFC and MMC, the internal submodule energy balance control of eDCPFC, and an internal circulating current optimized control strategy based on q-axis voltage injection are proposed. The full-power simulative results and low-power prototype experimental results verify the feasibility and effectiveness of the proposed control strategies, the proposed eDCPFC can regulate power flow in multiple lines. |
| Key words: meshed high-voltage DC transmission system cascaded multi-level structure embedded DC power flow controller modular multi-level converter active circulating current injection |
