刘亚锦,李克强,刘志坚
LIU Yajin,LI Keqiang,LIU Zhijian

• 1:昆明理工大学电力工程学院

摘要(Abstract)：

针对双馈风电场经长距离输电线路并网并配置串联补偿装置场景下的次同步振荡问题，提出基于VSG（虚拟同步发电机）-TCSC（可控串联补偿器）的次同步振荡抑制策略。首先，构建含TCSC的双馈风电场控制结构及系统模型；其次，建立系统小信号模型，运用根轨迹法从机理上分析VSG控制对次同步振荡的抑制作用及对系统稳定性的影响；最后，在MATLAB/Simulink中搭建系统时域仿真模型进行验证。仿真结果表明：与传统附加阻尼控制相比，VSG控制对系统结构性变化具有更强的适应性；在极端暂态工况下，该策略能有效维持系统稳定，表现出更优的阻尼性能，验证了其在应对严重系统冲击方面的优越性。
To address the problem of subsynchronous oscillation in DFIG-based wind farms connected to the grid via long-distance transmission lines with series compensation, a suppression strategy based on a virtual synchronous generator(VSG) and a thyristor-controlled series capacitor(TCSC) is proposed. First, the control structure and system model of a DFIG-based wind farm incorporating a TCSC are established. Second, a small-signal model of the system is developed, and the root locus method is employed to analyze the suppression mechanism of VSG control on subsynchronous oscillation and its impact on system stability. Finally, a time-domain simulation model is developed in MATLAB/Simulink for validation. Simulation results show that, compared with conventional supplementary damping control, VSG control exhibits stronger adaptability to structural variations of the system. Under severe transient conditions, the proposed strategy effectively maintains system stability and provides superior damping performance, demonstrating its effectiveness in mitigating severe system disturbances.

关键词(KeyWords)： 双馈风电场;次同步振荡;可控串联补偿装置;虚拟同步控制;小信号稳定分析
DFIG-based wind farm;subsynchronous oscillation;thyristor-controlled series capacitor;virtual synchronous control;small-signal stability analysis

Abstract:

Keywords:

基金项目(Foundation): 云南省基础研究计划（202301AS070055）

作者(Author): 刘亚锦,李克强,刘志坚
LIU Yajin,LI Keqiang,LIU Zhijian

DOI: 10.19585/j.zjdl.202607007

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