多维融合型并网逆变器动态阻尼增强控制
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1.安徽大学电气工程与自动化学院;2.安徽大学互联网学院

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TM464

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Damping Enhancement Control for Multi-Dimensional Fusion Grid-Connected Inverters
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1.School of Electrical Engineering and Automation,Anhui University,Anhui Hefei;2.Anhui University,Internet Academy,Anhui Hefei

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    摘要:

    针对现有仅在调制波层面加权的融合策略,因同步环节弱阻尼特性导致弱网下振荡衰减缓慢的问题,提出一种基于“角度-调制”多维融合的动态阻尼增强控制策略。首先,在角度维度引入锁相环微分分量构建虚拟相位超前校正环节,从机理上补偿相位滞后并主动注入动态阻尼;其次,依据小信号线性化理论建立包含融合权重的序阻抗模型,揭示构网型同步机制中虚拟惯量积分效应导致的相位滞后特性及所提策略的阻尼增强机理;再次,基于全局相位裕度分析,确立了实现跟网及构网特性优势互补的权重分配鲁棒运行系数。实验结果表明:该策略在短路比1至12的宽域范围内实现了系统稳定运行;在全域阻抗极限阶跃工况下,有效克服了欠阻尼振荡,实现了频率及功率的快速收敛;验证了其在复杂电网环境下的动态性能提升效果。

    Abstract:

    To address the slow oscillation decay in weak networks caused by weak damping characteristics in existing fusion strategies that only apply weighting at the modulation wave level, this paper proposes a dynamic damping enhancement control strategy based on “angle-modulation” multidimensional fusion. First, a virtual phase lead correction loop is introduced by incorporating a differential component into the phase-locked loop, mechanistically compensating for phase lag and actively injecting dynamic damping. Second, based on small-signal linearization theory, a sequence impedance model incorporating fusion weights is established. This reveals the phase lag characteristics caused by the virtual inertia integration effect in the grid-forming synchronization mechanism and the damping enhancement mechanism of the proposed strategy. Third, based on global phase margin analysis, robust operating coefficients for weight allocation are established to achieve complementary advantages in grid-following and grid-forming characteristics. Experimental results demonstrate that this strategy achieves stable system operation across a wide range of short-circuit ratios from 1 to 12. Under global impedance limit step conditions, it effectively overcomes underdamped oscillations, enabling rapid convergence of frequency and power. Its effectiveness in enhancing dynamic performance within complex grid environments is validated.

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胡存刚,蔡扬天,芮涛,等. 多维融合型并网逆变器动态阻尼增强控制[J]. 科学技术与工程, , ():

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  • 收稿日期:2026-04-08
  • 最后修改日期:2026-05-26
  • 录用日期:2026-07-25
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