1.中国南方电网有限责任公司超高压输电公司电力科研院,广东省广州市 510663
2.华南理工大学电力学院,广东省广州市 510640
廖芳群(1995—),女,硕士,工程师,主要研究方向:高压直流输电技术及工程应用。E-mail:liaofq0324@163.com
刘岳坤(1998—),男,通信作者,博士研究生,主要研究方向:高压直流输电系统分析、运行与控制。E-mail:yuekunliu@qq.com
刘航(1992—),男,硕士,工程师,主要研究方向:电力系统分析、运行与控制。E-mail:berlinliu@foxmail.com
收稿:2025-09-04,
修回:2026-01-23,
网络首发:2026-06-23,
移动端阅览
廖芳群,刘岳坤,刘航等.考虑限幅切换的构网型MMC多工况非线性建模及分岔行为分析[J/OL].电力系统自动化, http://dx.doi.org/10.7500/AEPS20250904006.
LIAO Fangqun,LIU Yuekun,LIU Hang,et al.Nonlinear Modeling and Bifurcation Behavior Analysis of Grid-forming MMC Under Multiple Operating Conditions Considering Limiter Switching[J/OL].Automation of Electric Power Systems, http://dx.doi.org/10.7500/AEPS20250904006.
廖芳群,刘岳坤,刘航等.考虑限幅切换的构网型MMC多工况非线性建模及分岔行为分析[J/OL].电力系统自动化, http://dx.doi.org/10.7500/AEPS20250904006. DOI:
LIAO Fangqun,LIU Yuekun,LIU Hang,et al.Nonlinear Modeling and Bifurcation Behavior Analysis of Grid-forming MMC Under Multiple Operating Conditions Considering Limiter Switching[J/OL].Automation of Electric Power Systems, http://dx.doi.org/10.7500/AEPS20250904006. DOI:
构网型模块化多电平换流器(MMC)凭借其对弱电网的主动支撑能力和灵活调控特性,已成为新能源电力系统的关键接入装备。然而,构网型MMC的周期时变非线性特性与限幅机制耦合作用下的分岔失稳机理尚不明确,现有分析方法面临模型维度膨胀或切换过程过度简化的局限性。为此,文中基于切换特征的连续化近似方法构建了多工况下的构网型MMC非线性时变模型;其次,基于Poincaré映射将周期轨道小信号稳定性问题转化为超平面内不动点的小信号稳定性问题,结合自动微分及数值延拓方法解析了限幅参与下系统的环面分岔及折叠分岔演化规律,并通过参与因子法识别了影响系统分岔的关键环节,对分岔机理进行了阐释;随后,针对电网强度、功率同步环、电压环及电流环参数对分岔点的影响进行了详细讨论;最后,基于PSCAD/EMTDC电磁暂态仿真模型验证了所提数学模型的正确性及分析结果的有效性。
The grid-forming modular multilevel converter (MMC)
owing to its active support capability for weak grids and flexible control characteristics
has become a key interfacing equipment in the power system with renewable energy. Nevertheless
the bifurcation-induced instability mechanisms arising from the coupled effects of periodically time-varying nonlinear characteristics and limiter mechanisms remain unclear. Existing analysis methods face limitations such as model dimensionality explosion or oversimplification of switching processes. To address these challenges
this paper develops a nonlinear time-varying model of a grid-forming MMC under multiple operating conditions based on a method of continuous approximation for switching characteristics. Then
based on the Poincaré mapping
the small-signal stability problem of periodic orbits is reformulated as the local stability problem of fixed points on a hyperplane. In conjunction with automatic differentiation and numerical continuation methods
the evolution rules of Neimark-Sacker bifurcations and fold bifurcations with participation of limiter are analyzed. A participation factor method is further employed to identify the key links affecting system bifurcation
thereby explaining the bifurcation mechanism. Subsequently
the impacts of grid strength and the parameters of the power-synchronization loop
voltage loop
and current loop on the bifurcation points are discussed in detail. Finally
the correctness of the proposed mathematical model and the validity of the analysis results are verified by the PSCAD/EMTDC electromagnetic transient simulation model.
戴熙杰 . 直流输电基础 [M]. 北京 : 水利电力出版社 , 1990 .
Dai Xijie . Fundamentals of DC power transmission [M]. Beijing : Water Resources and Electric Power Press ,, 1990 .
赵畹君 . 高压直流输电工程技术 [M]. 北京 : 中国电力出版社 , 2004 .
Zhao Wanjun . HVDC transmission engineering technology [M]. Beijing : China Electric Power Press , 2004 .
王永平 , 赵文强 , 杨建明 , 等 . 混合直流输电技术及发展分析 [J]. 电力系统自动化 , 2017 , 41 ( 7 ): 156 - 167 .
Wang Yongping , Zhao Wenqiang , Yang Jianming , et al . Hybrid high-voltage direct current transmission technology and its development analysis [J]. Automation of Electric Power Systems , 2017 , 41 ( 7 ): 156 - 167 .
刘岳坤 , 汪娟娟 , 王泽昊 , 等 . 定功率控制下柔性直流输电系统交流侧导纳矩阵建模及频率耦合抑制策略研究 [J]. 中国电机工程学报 , 2023 , 43 ( 10 ): 3718 - 3730 .
Liu Yuekun , Wang Juanjuan , Wang Zehao , et al . Research on AC admittance matrix modeling and frequency coupling effect of MMC-HVDC under power control [J]. Proceedings of the CSEE , 2023 , 43 ( 10 ): 3718 - 3730 .
邢超 , 蔡旺 , 毕贵红 , 等 . 昆柳龙特高压三端混合直流输电线路边界频率特性研究 [J]. 电力自动化设备 , 2023 , 43 ( 2 ): 135 - 141 .
Xing Chao , Cai Wang , Bi Guihong , et al . Research on boundary frequency characteristics of Kunliulong hybrid three-terminal UHVDC transmission line [J]. Electric Power Automation Equipment , 2023 , 43 ( 2 ): 135 - 141 .
陈亦平 , 黄济宇 , 郑外生 , 等 . 基于时序生产模拟的藏东南受端系统频率稳定风险分析及对策 [J/OL]. 南方电网技术 , 2025-03-27 . https://link.cnki.net/urlid/44.1643.tk.20250326.1013.004 https://link.cnki.net/urlid/44.1643.tk.20250326.1013.004 .
Chen Yiping , Huang Jiyu , Zheng Waisheng , et al . Frequency stability risk analysis and countermeasures for Southeast Xizang receiving-end system based on time-series production simulation [J/OL]. Southern Power System Technology , 2025-03-27 . https://link.cnki.net/urlid/44.1643.tk.20250326.1013.004 https://link.cnki.net/urlid/44.1643.tk.20250326.1013.004 .
Kundur P S , Malik O P . Power system stability and control [M]. 2nd ed . New York : McGraw Hill Education , 2022 .
刘昕宇 , 单永鹏 , 于愉 , 等 . 考虑电流限幅的跟网型变流器暂态电压稳定分析与自适应电流限幅控制方法 [J/OL]. 电工技术学报 , 2025-12-12 . https://doi.org/10.19595/j.cnki.1000-6753.tces.251759 https://doi.org/10.19595/j.cnki.1000-6753.tces.251759 .
Liu Xinyu , Shan Yongpeng , Yu Yu , et al . Transient voltage stability analysis of grid-following converter considering current limitation and adaptive current limiting control method [J/OL]. Transactions of China Electrotechnical Society , 2025-12-12 . https://doi.org/10.19595/j.cnki.1000-6753.tces.251759 https://doi.org/10.19595/j.cnki.1000-6753.tces.251759 .
Kuznetsov Y A . Elements of applied bifurcation theory [M]. Cham : Springer International Publishing , 2023 .
Xing G Z , Min Y , Chen L , et al . Limit induced bifurcation of grid-connected VSC caused by current limit [J]. IEEE Transactions on Power Systems , 2021 , 36 ( 3 ): 2717 - 2720 .
Xu Y H , Cheng Y D , Liu H , et al . Study on Hopf bifurcation types and dominant parameters of grid-connected voltage source converter considering non-linear saturation elements [J]. IET Renewable Power Generation , 2023 , 17 ( 8 ): 2124 - 2136 .
刘欣 , 袁易 , 王利桐 , 等 . 柔性直流输电系统三端口混合参数建模及其稳定性分析 [J]. 电工技术学报 , 2024 , 39 ( 16 ): 4968 - 4984 .
Liu Xin , Yuan Yi , Wang Litong , et al . Three-port hybrid parameter modeling and stability analysis of MMC-HVDC system [J]. Transactions of China Electrotechnical Society , 2024 , 39 ( 16 ): 4968 - 4984 .
Zhu S , Liu K P , Le J , et al . Stability assessment of modular multilevel converters based on linear time-periodic theory: time-domain vs. frequency-domain [J]. IEEE Transactions on Power Delivery , 2022 , 37 ( 5 ): 3980 - 3995 .
汪娟娟 , 王泽昊 , 刘岳坤 , 等 . 不对称工况下模块化多电平换流器稳定性分析的矩阵降维 [J]. 电力系统自动化 , 2024 , 48 ( 13 ): 147 - 159 .
Wang Juanjuan , Wang Zehao , Liu Yuekun , et al . Matrix dimensionality reduction for stability analysis of modular multilevel converters under asymmetric conditions [J]. Automation of Electric Power Systems , 2024 , 48 ( 13 ): 147 - 159 .
Zheng Z T , Huang S W , Bu Q S , et al . Detection of nonlinear behavior induced by hard limiting in voltage source converters in wind farms based on higher-order spectral analysis [J]. Journal of Modern Power Systems and Clean Energy , 2024 , 12 ( 2 ): 630 - 645 .
Danca M F . Continuous approximations of a class of piecewise continuous systems [J]. International Journal of Bifurcation and Chaos , 2015 , 25 ( 11 ): 1550146 .
Beyn W J , Champneys A. , Doedel E , et al . Numerical continuation, and computation of normal forms [M]// Handbook of Dynamical Systems . Amsterdam : Elsevier , 2002 : 149 - 219 .
Keller H B . Numerical solution of bifurcation and nonlinear eigenvalue problems [M]//RABINOWITZ P H. Applications of Bifurcation Theory . New York : Academic Press , 1977 : 359 - 384 .
Han M , Ma R , Zhan M . Transient synchronous stability analysis and assessment of PLL-based VSC systems by bifurcation theory [J]. IEEE Transactions on Energy Conversion , 2025 , 40 ( 2 ): 1312 - 1324 .
马晓阳 , 赵阳俊 , 梁锦文 , 等 . 多时滞风电系统的小信号多连通稳定区域划分 [J]. 电力系统自动化 , 2025 , 49 ( 3 ): 71 - 81 .
MA Xiaoyang , ZHAO Yangjun , LIANG Jinwen , et al . Small-signal multiply connected stability region partition for multi-time-delay wind power system [J]. Automation of Electric Power Systems , 2025 , 49 ( 3 ): 71 - 81 .
Garcia N , Acha E . Periodic steady-state analysis of large-scale electric systems using Poincare/spl acute/map and parallel processing [J]. IEEE Transactions on Power Systems , 2004 , 19 ( 4 ): 1784 - 1793 .
Garcia N , Romero M L , Acha E . Jacobian-free Poincaré-Krylov method to determine the stability of periodic orbits of electric power systems [J]. IEEE Transactions on Power Systems , 2022 , 37 ( 1 ): 429 - 442 .
Baydin A G , Pearlmutter B A , Radul A A , et al . Automatic differentiation in machine learning: a survey [J]. Journal of Machine Learning Research , 2018 , 18 ( 153 ): 1 - 43 .
Han Y S , Sun H S , Huang B Y , et al . Discrete-time domain modal analysis of oscillatory stability of renewables integrated power systems [J]. IEEE Transactions on Power Delivery , 2022 , 37 ( 5 ): 4248 - 4260 .
Yang J X , Tse C K , Huang M , et al . Bifurcations of grid-following rectifiers and routes to voltage instability in weak AC grids [J]. IEEE Transactions on Power Systems , 2023 , 38 ( 2 ): 1702 - 1713 .
0
浏览量
0
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621