中国电机工程学报2025，Vol.45Issue(8)：2946-2955,中插8,11.DOI:10.13334/j.0258-8013.pcsee.232463
基于自适应虚拟阻抗的构网型新能源电源不对称故障穿越控制
Asymmetric Fault Ride Through of Grid-forming Control of Renewable Energy Based on Adaptive Virtual Impedance
摘要
Abstract
During asymmetric grid faults,existing fault current limiting strategies struggle to constrain transient overcurrents in grid-forming(GFM)controlled renewable energy systems during both fault and recovery stages,compromising their ability to support the grid under severe disturbances.To address this challenge,this paper proposes a voltage-curve-based adaptive virtual impedance current limiting control strategy for fault ride-through(FRT).The method generates sequence-component virtual impedance values according to voltage sag characteristics while determining adaptive positive-and negative-sequence virtual impedance coefficients based on converter current withstand capability.This approach maintains the voltage source characteristics of GFM control while effectively limiting transient currents during fault and recovery phases within power device safe operating ranges,thereby enhancing renewable energy systems'grid support capability during FRT.Simulation and experimental validation conducted in PSCAD/EMTDC confirm the effectiveness of the proposed asymmetric FRT method.关键词
构网型控制/不对称故障穿越/电流限幅/虚拟阻抗Key words
grid-forming control/asymmetric fault ride through/fault current limit/virtual impedance分类
动力与电气工程引用本文复制引用
贾科,刘芸,毕天姝,张旸..基于自适应虚拟阻抗的构网型新能源电源不对称故障穿越控制[J].中国电机工程学报,2025,45(8):2946-2955,中插8,11.基金项目
国家重点研发计划项目(2022YFB4202302).National Key R&D Program of China(2022YFB4202302). （2022YFB4202302）
