电网技术2026，Vol.50Issue(4)：1403-1412,中插5-中插6,12.DOI:10.13335/j.1000-3673.pst.2025.1212
基于自适应虚拟阻感比的构网型变流器故障穿越控制方法
Fault Ride-through Control Method for Grid-forming Converter Based on Adaptive Virtual Resistance-to-inductance Ratio
摘要
Abstract
Virtual impedance control is commonly employed by grid-forming renewable energy sources during fault ride-through to achieve fault current limitation while maintaining voltage source characteristics to support the grid.However,existing virtual impedance methods that use a fixed resistance-to-inductance(X/R)ratio lack the flexibility to control reactive power output and to provide adequate voltage support.To address this issue,this paper proposes a fault ride-through control method for the grid-forming(GFM)converter based on an adaptive virtual X/R ratio.First,the influence of the virtual X/R ratio on active and reactive power characteristics is analyzed.Then,considering three control objectives—transient voltage support,peak current limitation,and system synchronization stability—a constraint boundary for the virtual X/R ratio of the GFM converter is established in the virtual impedance plane.Based on this boundary,a dynamic selection method for the X/R ratio is developed to achieve the synergistic optimization of the three objectives.Simulation results demonstrate that the proposed method significantly enhances the GFM converter's voltage support capability during fault ride-through.Compared with existing methods,it increases reactive power output during the fault by over 30％without violating the converter's operational safety limits,as verified in PSCAD/EMTDC.关键词
新能源/构网型控制/虚拟阻感比/电压支撑/故障穿越Key words
renewable energy/grid-forming control/virtual resistance-to-inductance ratio/voltage support/fault ride-through分类
信息技术与安全科学引用本文复制引用
贾科,王鹤子,毕天姝,张旸,刘东昊..基于自适应虚拟阻感比的构网型变流器故障穿越控制方法[J].电网技术,2026,50(4):1403-1412,中插5-中插6,12.基金项目
国家自然科学基金项目:优秀青年科学基金(52322703).Project Supported by National Natural Science Foundation of China:Excellent Young Scientists Fund(52322703). （52322703）
