高电压技术2025，Vol.51Issue(12)：6033-6043,中插17-中插24,19.DOI:10.13336/j.1003-6520.hve.20250074
基于VSG暂态阻尼优化的MMC并网功率控制
MMC Grid-connected Power Control Based on VSG Transient Damping Optimization
摘要
Abstract
The modular multi-level converter(MMC),under traditional virtual synchronous generator(VSG)control,effectively suppresses transient oscillations caused by power disturbances,grid frequency fluctuations,and power flow reversals.However,challenges such as power overshoot and steady-state deviation remain,making it difficult for the sys-tem to balance the steady-state and transient performance,ultimately affecting stability and response accuracy.This paper proposes a VSG control strategy(AVSG)based on active power transient feedback compensation(active power transient feedback compensation,AFC),which uses the compensation term of active power transient feedback to replace the damping coefficient to solve the above problems.Initially,a traditional VSG grid-connected active power closed-loop small-signal model is established by employing the electrical equivalent relationship between MMC and synchronous generator(SG).Subsequently,the influences of damping coefficient and virtual inertia on the system's dynamic perfor-mance are analyzed.Then,a VSG grid-connected active power closed-loop small-signal model is constructed by incorporating the AFC algorithm.The model efficacy in suppressing system transient oscillations and mitigating active power steady-state deviations is analyzed by the Bode diagram.Furthermore,the study provides a method for tuning the relevant parameters.Finally,an MMC grid-connected model based on AFC-VSG control is built on the Matlab/Simulink and StarSim hardware-in-the-loop experimental platform.Simulation and experimental results show that the proposed method can be adopted to effectively mitigate power overshoot and rapidly supply frequency support in response to abrupt power variations of MMC and power grid frequency drop.Concurrently,the method exhibits enhanced tracking perfor-mance during power flow reversals,and significantly restrains system current and power oscillations,thus improving the system's dynamic response ability and operation stability.关键词
模块化多电平换流器/虚拟同步发电机/功率超调/有功暂态补偿/稳定性分析Key words
modular multi-level converter/virtual synchronous generator/power overshoot/active power transient compensation/stability analysis引用本文复制引用
XIA Yan,SONG Qingya,CHEN Yang,SHI Jinhui,YANG Yili,LI Ke..基于VSG暂态阻尼优化的MMC并网功率控制[J].高电压技术,2025,51(12):6033-6043,中插17-中插24,19.基金项目
四川省科技计划(2022SZYZF01) （2022SZYZF01）
四川省氢能源与多能互补微电网工程技术研究中心项目(2024DWNY006) （2024DWNY006）
四川轻化工大学研究生创新基金(Y2024281). Project supported by Sichuan Science and Technology Program(2022SZYZF01),Fund of Hydrogen Energy and Multi-energy Comple-mentary Microgrid Engineering Technology Research Center of Sichuan(2024DWNY006),Innovation Fund of Postgraduate,Sichuan University of Science&Engineering(Y2024281). （Y2024281）
