建构网型控制与混合储能协同的分散式风电配电网电稳定性分析与控制

Voltage stability analysis and control of distributed wind power distribution networks based on grid-forming control and hybrid energy storage coordination

  • 摘要: 高比例分散式风电接入,使配电网呈现低惯量、高波动及强非线性特征,传统基于无功调节的电压控制方法 难以满足动态稳定运行需求。针对上述问题,建立了分散式风电接入配电网的电压-功率耦合模型及小信号动态模型, 分析了风电出力波动对电压稳定性的影响机理。在此基础上,提出一种计及构网型控制与混合储能协同的多时间尺 度电压稳定控制方法:利用虚拟同步机实现电压的主动支撑与惯性响应,引入混合储能系统对风电功率进行分解与 平抑,并构建源-网-荷-储协同优化控制框架。基于IEEE 33节点配电网算例开展仿真分析。结果表明,所提方 法可有效降低节点电压偏差,改善系统阻尼特性并抑制振荡,显著提升高渗透率条件下的电压稳定水平。

     

    Abstract: High penetration of distributed wind power introduces low inertia, high volatility, and strong nonlinearity into distribution networks, making conventional voltage control methods based on reactive power regulation insufficient to ensure dynamic stability. To address this issue, this paper develops a voltage–power coupling model and a small-signal dynamic model for distribution networks with distributed wind integration, and investigates the mechanism by which wind power fluctuations affect voltage stability. On this basis, a multi-timescale voltage stability control strategy considering the coordination of grid-forming control and hybrid energy storage is proposed. Specifically, a virtual synchronous generator is employed to provide active voltage support and inertia response, while a hybrid energy storage system is introduced to decompose and smooth wind power fluctuations. Furthermore, a coordinated optimization control framework integrating source, network, load, and storage is established. Simulation studies are carried out on the IEEE 33-bus distribution system. The results demonstrate that the proposed method can effectively reduce node voltage deviations, enhance system damping characteristics, suppress oscillations, and significantly improve voltage stability under high penetration conditions.

     

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