中国电机工程学报2026，Vol.46Issue(6)：2179-2193,中插2,16.DOI:10.13334/j.0258-8013.pcsee.250141
计及直流动态的构网型VSC暂态稳定机理分析及改进方法研究
Mechanism Analysis and Improvement of Grid-forming VSC Transient Stability Considering DC Dynamics
摘要
Abstract
For the transient stability issue of grid-forming voltage source converters(GFM-VSC),most existing studies have assumed constant DC-side voltage,neglecting the influence of DC-side dynamics on the transient stability of GFM-VSCs,leading to overly optimistic analysis results.Therefore,this paper investigates a GFM-VSC grid-connected system considering DC-side dynamics,revealing a novel transient instability mechanism dominated by DC voltage dynamics and proposing corresponding stabilization methods.Firstly,a large-disturbance analysis model of the GFM-VSC grid-connected system,incorporating energy storage batteries and DC capacitor dynamics,is developed.Then,using equal-area criterion and phase-plane analysis,the transient stability mechanisms of the GFM-VSC under both unconstrained and constrained DC-side energy conditions are revealed.Subsequently,the impact of key factors such as energy storage battery capacity,DC bus capacitance,and current limiting components on the system's transient stability is analyzed,with corresponding stabilization methods proposed.Finally,electromagnetic transient simulations are conducted to verify the correctness and effectiveness of the proposed mechanism analysis and stabilization methods.关键词
直流储能设备/直流动态特性/构网型技术/电压源型变流器/暂态稳定性Key words
DC energy storage device/DC dynamic characteristic/grid-forming technology/voltage source converter(VSC)/transient stability分类
信息技术与安全科学引用本文复制引用
杜毅,孙华东,郑超,徐云飞,栾晓明..计及直流动态的构网型VSC暂态稳定机理分析及改进方法研究[J].中国电机工程学报,2026,46(6):2179-2193,中插2,16.基金项目
中国电力科学研究院有限公司自有项目(XT83-22-005). Project Supported by China Electric Power Research Institute(CEPRI)Provides Funding(XT83-22-005). （XT83-22-005）
