电力系统自动化2026，Vol.50Issue(10)：87-100,14.DOI:10.7500/AEPS20250623001
基于虚拟磁链反馈控制的跟/构网型MMC暂态稳定性提升方法
Transient Stability Enhancement Method for Grid-following and Grid-forming Modular Multilevel Converters Based on Virtual Flux Linkage Feedback Control
摘要
Abstract
The modular multilevel converter(MMC)based high voltage direct current(HVDC)transmission is an important approach to the large-scale integration of renewable energy.In areas where renewable energy is concentrated,the insufficient transient stability margin has become one of the key factors limiting the transmission section limits.To address the transient instability of MMC caused by large-signal disturbances,a virtual flux linkage feedback control is introduced without altering the original control structure,thereby enhancing the transient stability capability and prolonging the critical clearing time of the grid-following and grid-forming MMCs.By deriving the impedance characteristics of grid-following and grid-forming MMCs and the power angle characteristics of the grid-forming MMC before and after adding virtual flux linkage feedback control,it is found that the virtual flux linkage feedback control can reduce the resonant peak and enhance the phase angle stability margin of both grid-following and grid-forming MMCs,and shift the power angle characteristics of grid-forming MMC upward,endowing it with a natural characteristic of"large deceleration area and small acceleration area".The effectiveness of the proposed control strategy and the correctness of the theoretical derivation results are verified through the two-terminal MMC-HVDC system and the 3-machine 9-bus system based on PSCAD/EMTDC and the hardware-in-the-loop(HIL)experiments.关键词
柔性直流输电/模块化多电平换流器/暂态稳定性/小信号稳定性/虚拟同步机/跟网型控制/构网型控制/虚拟磁链反馈控制Key words
flexible direct current(DC)transmission/modular multilevel converter(MMC)/transient stability/small-signal stability/virtual synchronous generator/grid-following control/grid-forming control/virtual flux linkage feedback control引用本文复制引用
刘洋,李昊恒,阳岳希,陈金聪,武艳秋,陈增杰..基于虚拟磁链反馈控制的跟/构网型MMC暂态稳定性提升方法[J].电力系统自动化,2026,50(10):87-100,14.基金项目
广东省基础与应用基础研究基金资助项目(2023A1515240019). This work is supported by Guangdong Provincial Basic and Applied Basic Research Foundation of China(No.2023A1515240019). （2023A1515240019）
