电力系统保护与控制2025，Vol.53Issue(5)：11-23,13.DOI:10.19783/j.cnki.pspc.240675
计及多区域直驱风场经VSG控制的MMC送出系统小信号稳定性分析
Small signal stability analysis of multi-region direct-drive wind farms connected via a VSG-controlled MMC transmission system
摘要
Abstract
Large-scale direct-drive wind farm grid connection systems are typically composed of permanent magnet synchronization generators(PMSG)and modular multilevel converters(MMC),forming a complex interaction mechanism after interconnection.Additionally,the full-power converters of the direct-drive wind turbines and the conventional vector control strategy of MMC result in low inertia and low damping characteristics,making it difficult to maintain frequency and voltage stability in the direct-drive wind farm connected via MMC transmission systems.To address this issue,this paper establishes a small signal model of multi-region direct-drive wind farms and an MMC transmission system under virtual synchronous generator(VSG)control.The dynamic responses of the electromagnetic transient and the small signal model are compared to verify the correctness of the small signal model.When the output power of the direct-drive wind farm increases,the system faces stability risks.The participation factor method is used to analyze the influence of the parameters of the voltage outer loop and circulation suppression controllers on the stability of the grid-connected system.The root locus method is applied to determine the feasible parameter range,followed by parameter optimization.The effectiveness of the parameter optimization is verified through PSCAD/EMTDC simulations,providing a theoretical basis for parameter selection.关键词
模块化多电平换流器/风电场/永磁同步发电机/虚拟同步发电机控制/小信号模型/特征根轨迹分析Key words
modular multilevel converter/wind farm/permanent magnet synchronization generator/virtual synchronous generator control/small signal model/eigenvalue trajectory analysis引用本文复制引用
朱煜昆,贾轩,潘霄汉,朱益华,涂亮,常东旭,王谱宇..计及多区域直驱风场经VSG控制的MMC送出系统小信号稳定性分析[J].电力系统保护与控制,2025,53(5):11-23,13.基金项目
This work is supported by the National Key Research and Development Program of China(No.2021YFB2400900). 国家重点研发计划项目资助(2021YFB2400900) （No.2021YFB2400900）
江苏省自然科学基金面上项目资助(BK2024021615) （BK2024021615）
