分布式弹性配电网异构分区动态协同方法
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TM464

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国家自然科学基金资助项目(52277172)


Dynamic collaborative methods for heterogeneous partitioning of distributed resilient distribution network
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    摘要:

    近年来,极端自然灾害与潜在地缘冲突严重威胁配电网的稳定可靠运行。传统动态恢复区(dynamic recovery area, DRA)忽视了海量跟网型资源的恢复潜力,也未明晰多逆变器协同运行的多动作阶段,为此,文中提出一种异构DRA分区动态协同运行框架。首先,定义构网支撑型、跟网补充型和构跟混合型DRA,并提出包含分区建立、形态切换与并网同步的故障恢复多关键动作阶段。然后,根据各阶段的运行需求,设计分布式变流器与智能软开关的动态协同控制方法,在二次控制中引入电压/频率无差恢复及功率均分变量以实现区内稳定运行,引入智能开关(smart switch, SSW)及并网开关无缝动作变量以实现跨区间平稳交互。最后,在MATLAB/Simulink中搭建仿真模型,验证所提框架与所设计控制器的可行性和有效性。结果表明,所提方法可实现DRA电压频率建立及内部资源功率均分,灵活响应SSW与并网开关的动作指令,充分挖掘异构资源协同恢复潜力,增强配电网运行弹性。

    Abstract:

    In recent years, extreme natural disasters and potential geopolitical conflicts have seriously threatened the stable and reliable operation of distribution networks. Traditional dynamic recovery areas (DRA) overlook the recovery potential of vast grid following resources and fail to clarify the multi-action stages of multi-inverter coordinated operation. A heterogeneous DRA partitioned dynamic coordinated operation framework is proposed. Firstly, grid-forming, grid-following, and hybrid grid-forming and following DRAs are defined. Multi-key action stages for fault recovery, including partition establishment, mode switching, and grid synchronization, are introduced. Then, based on the operational requirements of each stage, a dynamic collaborative control method for distributed converters and soft open point is designed. In secondary control, voltage/frequency-free recovery and power sharing variables are introduced to achieve stable operation within the partition, while seamless interaction variables for smart switch (SSW) and grid-connection switches are introduced to ensure smooth cross-partition interaction. Finally, a simulation model is built in MATLAB/Simulink to verify the feasibility and effectiveness of the proposed framework and control design. The results show that the proposed method can establish DRA voltage and frequency, equally distribute internal resource power, flexibly respond to commands from SSW and grid-connection switch, fully exploit the coordinated recovery potential of heterogeneous resources, and enhance the operational resilience of the distribution network.

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蒋玮,江宇,林加顺,邓一帆,袁晓冬,张宸宇.分布式弹性配电网异构分区动态协同方法[J].电力工程技术,2025,44(4):2-13

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  • 收稿日期:2025-01-04
  • 最后修改日期:2025-04-10
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  • 在线发布日期: 2025-08-01
  • 出版日期: 2025-07-28
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