电网技术2026，Vol.50Issue(9)：3576-3585,中插24-中插27,14.DOI:10.13335/j.1000-3673.pst.2025.0788
双馈调相机接入的风电并网系统小扰动稳定性分析
Small-signal Stability Analysis of Wind Power Grid-connected System With Doubly-fed Condenser
摘要
Abstract
The interaction between a doubly-fed condenser(DFC),as a new type of power electronic equipment supporting system voltage and frequency stabilization,and the alternating current(AC)grid has the risk of inducing the system's small-signal instability.Therefore,it is urgent to research the small-signal stability of DFC connected to the AC grid.Firstly,in this paper,by analogy with the stability analysis method of a second-order typical system,the concept of equivalent damping coefficient is extended to the stability analysis of the oscillation mode of the phase-locked loop(PLL)involved in a wind turbine.Then,based on the equivalent damping coefficient,the damping coefficient sensitivity reflecting the influence of control parameters on system stability is proposed.Finally,based on a wind power grid-connected system with DFC,the validity of the equivalent damping coefficient and the damping coefficient sensitivity has been verified.The findings show that the oscillation mode,primarily controlled by the PLL involved in the wind turbine,poses a stability risk.As the proportional coefficient of the wind turbine PLL rises,the integral coefficient diminishes,and the proportional coefficients of the rotor-side power outer-loop and current inner-loop rise;the system stability is improved.关键词
阻尼系数灵敏度/等效阻尼系数/锁相环振荡模式/小扰动稳定性Key words
damping coefficient sensitivity/equivalent damping coefficient/phase-locked loop oscillation mode/small-signal stability分类
信息技术与安全科学引用本文复制引用
王晓龙,牟倩颖,李亚捷,褚晓东..双馈调相机接入的风电并网系统小扰动稳定性分析[J].电网技术,2026,50(9):3576-3585,中插24-中插27,14.基金项目
国家重点研发计划项目:高惯量储能型同步调相机关键技术与装备(项目编号:2023YFB2406800).Project Supported by National Key R&D Program of China:Key Technology and Equipment for High Inertia Energy Storage Synchronous Condenser(2023YFB2406800). （项目编号:2023YFB2406800）
