电网技术2025，Vol.49Issue(9)：3643-3654,中插34-中插39,18.DOI:10.13335/j.1000-3673.pst.2024.0897
基于虚拟同步控制的构网型直驱风机轴系扭振特性分析
Torsional Oscillation Characteristics Analysis of Grid-forming PMSG-based Wind Turbine System Based on Virtual Synchronous Generator Control
摘要
Abstract
The control structure of the grid-forming permanent magnet synchronous generator(PMSG)-based wind-driven system,based on virtual synchronous generator(VSG)control,inherently exposes its torsional oscillation characteristics to the influence of grid-side dynamics.External disturbances to the system may induce torsional oscillation,resulting in low-frequency oscillations.Currently,the mechanistic understanding of the torsional oscillation characteristics of the PMSG-based wind-driven system based on VSG remains unclear,and the key limiting factors are yet to be identified.The impact mechanism of grid-side dynamics on the damping of the shaft system is also unresolved.Therefore,this paper presents a detailed analysis of the torsional oscillation characteristics in the PMSG-based wind-driven system based on VSG.Firstly,the electromagnetic torque-speed difference transfer function is derived using the electrical torque method.Additionally,the equivalent damping coefficient is defined to quantitatively express the damping effect of the electromagnetic torque on the shaft system.Simultaneously,it explores the influence mechanism of grid-side dynamics on the effect of electromagnetic torque on shaft damping under maximum power point tracking(MPPT)control,and determines the key constraint factors that affect shafting damping and their influencing laws.Based on these findings,a torsional suppression strategy is proposed to improve system stability.Finally,the theoretical analysis was validated using SIMULINK simulations,which confirmed the accuracy of the analysis and the effectiveness of the control strategies.关键词
构网型/虚拟同步控制/直驱风机/轴系扭振/抑制策略Key words
grid-forming/VSG/PMSG-based wind-driven system/torsional oscillation/suppression strategy分类
信息技术与安全科学引用本文复制引用
马亦卓,谭贝斯,徐晋,秦世耀,李国杰,高晨祥,汪可友..基于虚拟同步控制的构网型直驱风机轴系扭振特性分析[J].电网技术,2025,49(9):3643-3654,中插34-中插39,18.基金项目
国家电网有限公司总部管理科技项目(5100-20220202-4A-1-1-ZN).Project Supported by the Science and Technology Project of State Grid Corporation of China(5100-202202024A-1-1-ZN). （5100-20220202-4A-1-1-ZN）
