王欣怡,李晓露,柳劲松,林顺富
WANG Xinyi,LI Xiaolu,LIU Jinsong,LIN Shunfu

• 1:上海电力大学电气工程学院
• 2:国网上海市电力公司电力科学研究院

摘要(Abstract)：

在含GFL（跟网）与GFM（构网）变流器的混合型风电场中，GFM与GFL的不同容量配比显著影响风电场整体稳定性。为此，提出混合直驱风电场中GFL与GFM变流器的优化配比方法。首先，构建含GFL与GFM变流器的阻抗模型，用以分析GFM和GFL配置比例与风电场整体稳定性的关系，并基于PCC（并网点）阻抗和分岔理论分析混合风电场的稳定性。其次，根据风电场PCC电网侧等值阻抗的变化，以最小GFM单元占比为优化目标，在保证风电场整体稳定性约束下，确定GFL和GFM机组的容量配比，以提升风电场的安全稳定运行能力。最后，在MATLAB/Simulink平台中进行仿真验证，结果表明，在不同强度的电网下，应对功率指令下降和上升时，所提优化配比方案相比于平均分配方案，具有更短的响应时间和更好的稳定性。
In hybrid wind farms with both grid-following(GFL) and grid-forming(GFM) converters, their capacity allocation significantly impacts the overall stability of the wind farm. To address this, an optimization method for capacity allocation of GFL and GFM converters in hybrid direct-drive wind farms is proposed. First, an impedance model incorporating both GFL and GFM converters is developed to analyze the relationship between the GFM and GFL converter allocation and the overall stability of the wind farm. The stability of the hybrid wind farm is further evaluated using the impedance at the point of common coupling(PCC) and bifurcation theory. Second, accounting for variations in the grid-side equivalent impedance at the wind farm PCC, an optimization model is established with the objective of minimizing the proportion of GFM units while ensuring overall wind farm stability constraints. This model determines the optimal capacity allocation between GFL and GFM converters to enhance the security and stability of wind farm operation. Finally, simulations conducted on the MATLAB/Simulink platform demonstrate that under both strong and weak grid conditions, the proposed method achieves shorter response times and superior stability during both power command decrease and increase scenarios.

关键词(KeyWords)： 跟网型变流器;构网型变流器;混合直驱风电场;优化配比;并网点阻抗
GFL converter;GFM converter;hybrid direct-drive wind farm;optimal allocation;impedance at PCC

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51977127)

作者(Author): 王欣怡,李晓露,柳劲松,林顺富
WANG Xinyi,LI Xiaolu,LIU Jinsong,LIN Shunfu

DOI: 10.19585/j.zjdl.202601009

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