东南大学电气工程学院,江苏省南京市 210096
邵一鸣(2001—),女,硕士研究生,主要研究方向:分布式发电、微电网技术。E-mail:shaoyiming407@163.com
梅 军(1971—),男,通信作者,博士,副教授,博士生导师,主要研究方向:电力电子控制与应用、微电网运行控制、电力系统分析与控制等。E-mail:mei_jun@seu.edu.cn
刁伟业(1997—),男,博士研究生,主要研究方向:分布式能源电力转换、交直流微电网控制技术等。E-mail:Domiye@seu.edu.cn
收稿:2025-05-29,
修回:2025-08-11,
网络首发:2025-11-21,
纸质出版:2026-02-10
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邵一鸣,梅军,刁伟业等.考虑频率稳定的SG-VSG异构并联系统功率振荡抑制方法[J].电力系统自动化,2026,50(3):90-100.
SHAO Yiming,MEI Jun,DIAO Weiye,et al.Power Oscillation Suppression Method for Synchronous Generator-Virtual Synchronous Generator Heterogeneous Parallel System Considering Frequency Stability[J].Automation of Electric Power Systems,2026,50(3):90-100.
邵一鸣,梅军,刁伟业等.考虑频率稳定的SG-VSG异构并联系统功率振荡抑制方法[J].电力系统自动化,2026,50(3):90-100. DOI: 10.7500/AEPS20250529003.
SHAO Yiming,MEI Jun,DIAO Weiye,et al.Power Oscillation Suppression Method for Synchronous Generator-Virtual Synchronous Generator Heterogeneous Parallel System Considering Frequency Stability[J].Automation of Electric Power Systems,2026,50(3):90-100. DOI: 10.7500/AEPS20250529003.
由同步发电机(SG)和虚拟同步发电机(VSG)构成的孤岛微电网在负荷扰动下易引发功率振荡,且现有的抑制策略难以兼顾系统的频率特性。为此,文中提出一种考虑频率稳定的功率振荡抑制方法。首先,基于SG和VSG功角响应差异,将输出功率分解为动、稳态分量,并利用2-范数量化动态分量对功率振荡的影响,进而揭示稳定机理。其次,建立SG-VSG异构并联系统的状态空间模型,分析异构电源的物理差异和参数失配对系统功率和频率稳定特性的影响。然后,提出基于分频功率补偿的振荡抑制策略,利用高频功率分量加速振荡衰减。进一步,考虑频率变化率的约束优化控制结构,实现振荡抑制与频率性能的协同优化。最后,通过实验验证了理论分析及所提方法的有效性。
The islanded microgrid composed of synchronous generator (SG) and virtual synchronous generator (VSG) is prone to power oscillation under load disturbances
while existing suppression strategies are difficult to take into account the frequency characteristics of the system. Therefore
a power oscillation suppression method considering frequency stability is proposed. Firstly
based on the difference of power angle response between SG and VSG
the output power is decomposed into dynamic and steady-state components
and the influence of the dynamic component on the power oscillation is quantified by 2-norm
thereby revealing the stabilization mechanism. Secondly
the state-space model of SG-VSG heterogeneous parallel system is established to analyze the effects of physical difference and parameter mismatch of heterogeneous power sources on the power and frequency stability characteristics of the system. Then
an oscillation suppression strategy based on frequency-division power compensation is proposed
which utilizes a high-frequency power component to accelerate oscillation attenuation. Furthermore
the control structure is optimized with the rate of change of frequency (RoCoF) constraint to achieve coordinated optimization of oscillation suppression and frequency performance. Finally
the effectiveness of the theoretical analysis and the proposed method is verified by experiments.
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