南方电网技术2026，Vol.20Issue(1)：12-23,12.DOI:10.13648/j.cnki.issn1674-0629.2026.01.002
基于虚拟阻抗控制的跟/构网混联经柔性直流送出系统中传输容量提升与构网占比优化策略
Virtual Impedance-Based Control Strategy for Transmission Capacity Enhancement and Grid-Forming Proportion Optimization in Following/Forming Hybrid VSC DC Systems
摘要
Abstract
In order to address the oscillation issues induced by the increase in system transmission capacity and the reduction of grid-forming wind turbine capacity share in grid-forming and grid-following hybrid wind farms delivered via VSC DC transmission systems,a overall state-space model of the system is established.Based on this model,root locus and modal analysis methods are employed to identify the dominant contributing factors to system oscillations under different operating conditions.The analysis results indicate that system oscillations are mainly influenced by the control variables associated with the voltage outer loops of the grid-forming wind turbines and the VSC DC converter stations.On this basis,a control strategy introducing virtual impedance into the voltage outer loops of the grid-forming wind turbines and the VSC DC converter stations is proposed to improve the system impedance characteristics and suppress oscillations.Furthermore,the feasible parameter range for the virtual impedance is determined through root locus analysis.Finally,simulation results validate that the proposed virtual impedance control method can ef-fectively enhance system performance,thereby confirming the feasibility and effectiveness of the proposed strategy.关键词
构网型控制/混联系统/构网型风机比例/虚拟阻抗/柔性直流/振荡抑制Key words
grid-forming control/hybrid systems/grid-forming wind turbine proportion/virtual impedance/VSC DC/oscillation suppression分类
信息技术与安全科学引用本文复制引用
邓晓洋,吴林林,李立沣,王潇..基于虚拟阻抗控制的跟/构网混联经柔性直流送出系统中传输容量提升与构网占比优化策略[J].南方电网技术,2026,20(1):12-23,12.基金项目
国家重点研发计划资助项目(2022YFB2402800) （2022YFB2402800）
华北电力科学研究院有限责任公司科技项目(KJZ2023124).Supported by the National Key Research and Development Program of China(2022YFB2402800) （KJZ2023124）
the Science and Technology Program of North China Electric Power Research Institute Co.,Ltd.(KJZ2023124). （KJZ2023124）
