电力系统保护与控制2025，Vol.53Issue(12)：57-68,12.DOI:10.19783/j.cnki.pspc.241138
基于自适应虚拟阻抗的构网型变流器暂态稳定性提升策略研究
Grid-forming converter transient stability enhancement strategy based on adaptive virtual impedance
摘要
Abstract
During grid faults,grid-forming converters(GFC)switch to current limiting operation,which can lead to uncontrollable power output and potential transient instability.To ensure GFC can meet the requirements of current limiting and maintaining synchronization stability with the system during faults,while also addressing transient overcurrent issue following fault clearance,an adaptive virtual impedance control strategy is proposed to improve transient stability.First,based on the analysis of power-angle curve during GFC transient operation,the transient stability conditions for GFC are established.Then,the impact of virtual impedance on fault current limiting and synchronization stability during transients is analyzed.An adaptive virtual inductance closed-loop control strategy is proposed to enhance synchronization stability,while an adaptive virtual resistance is employed to limit fault overcurrent.Finally,hardware-in-the-loop tests on a single-machine infinite-bus system and simulations on an 8-bus system are conducted to validate the effectiveness of the proposed control strategy.Results show that the strategy effectively limits fault overcurrent,maintains stable power output during faults,and avoids peak power and current spikes upon fault recovery.关键词
构网型变流器/暂态稳定性/虚拟阻抗/电流限制/同步稳定性Key words
grid-forming converter/transient stability/virtual impedance/current limiting/synchronization stability引用本文复制引用
黄炳政,陈俊儒,刘牧阳,钟伟麟..基于自适应虚拟阻抗的构网型变流器暂态稳定性提升策略研究[J].电力系统保护与控制,2025,53(12):57-68,12.基金项目
This work is supported by the Key S&T Special Program of Science and Technology Department of the Xinjiang Uygur Autonomous Region(No.2022A01004-1). 新疆维吾尔自治区科技厅重大科技专项资助(2022A01004-1) （No.2022A01004-1）
