异构分布式光伏互联逆变器并网系统建模与稳定性提升方法
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(1.国网浙江省电力有限公司电力科学研究院 ,浙江 杭州 310007;2.国家电能变换与控制工程技术研究中心 (湖南大学 ) ,湖南 长沙 410082;3.长沙理工大学电气与信息工程学院 ,湖南 长沙 410004)

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通讯作者:

龚迪阳(1993—),男,硕士,高级工程师,主要从事分布式电源及微网和人工智能应用方面的研究;E-mail:diyang915@outlook.

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TM863

基金项目:

国网浙江省电力有限公司科技项目(5211DS230003)


Modeling and stability improvement methods for grid -connected systems of heterogeneous distributed photovoltaic interconnected inverters
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(1. Electric Power Research Institute , State Grid Zhejiang Electric Power Co ., Ltd., Hangzhou 310007, China; 2. National Electric Power Conversion and Control Engineering Technology Research Center (Hunan University ) , Changsha 410082, China; 3. School of Electrical & Information Engineering , Changsha University of Science & Technology , Changsha 410004, China)

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    摘要:

    跟网型、构网型异构互联光伏逆变器接入电网后,极易发生交互影响导致并网逆变器失去稳定,威胁新能源并网系统的安全稳定运行。为此,考虑光伏直流侧电压的动态影响,分别构建了跟网型、构网型以及二者互联下异构分布式光伏逆变器接入电网后的小信号阻抗模型,分析了异构并网逆变器对电网阻抗的适应性。与此同时,为扩大异构互联系统对电网阻抗的适应范围、促进新能源消纳,从跟网型、构网型回比矩阵特征值的频率特性着手,提出一种跟网型不对称与构网型有功幅值相角补偿的混合控制策略,并完成了控制参数设计,以提升异构互联系统对电网的适应能力。仿真与实验验证了相关理论分析的正确性。

    Abstract:

    After grid-following and grid-forming heterogeneous interconnected photovoltaic inverters are connected to the power grid,interactive influences easily occur,resulting in the instability of grid-connected inverters and threatening the safe and stable operation of the new energy grid-connected system.Therefore,considering the dynamic influence of photovoltaic direct current side voltage,small-signal impedance models of grid-following,grid-forming,and their interconnected heterogeneous distributed photovoltaic inverters connected to the grid were constructed,respectively,and the adaptability of heterogeneous grid-connected inverters to grid impedance was analyzed.Meanwhile,to expand the adaptation range of heterogeneous interconnected systems to grid impedance and promote the consumption of new energy,starting from the frequency characteristics of the eigenvalues of the return ratio matrices of grid-following and grid-forming inverters,a hybrid control strategy involving asymmetric compensation for grid-following inverters and active amplitude phase angle compensation for grid-forming inverters was proposed,and the control parameter design was completed to enhance the adaptability of heterogeneous interconnected systems to the grid.The correctness of the related theoretical analysis is verified by simulation and experiment.

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龚迪阳,汪湘晋,李俊豪,等.异构分布式光伏互联逆变器并网系统建模与稳定性提升方法[J].电力科学与技术学报,2026,41(3):280-294.
Gong Diyang, Wang Xiangjin, Li Junhao, et al. Modeling and stability improvement methods for grid -connected systems of heterogeneous distributed photovoltaic interconnected inverters[J]. Journal of Electric Power Science and Technology,2026,41(3):280-294.

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  • 收稿日期:2024-08-21
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  • 在线发布日期: 2026-07-02
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