电力工程技术2025，Vol.44Issue(5)：35-45,11.DOI:10.12158/j.2096-3203.2025.05.003
风机出力变化下直驱风电场小干扰稳定性分析
Analysis of small signal stability in direct-drive wind farm under wind power generation variations
摘要
Abstract
The small-signal stability problem of large-scale grid-connected wind farms consisting of permanent magnet synchronous generators(PMSGs)under wind power variations is addressed in this paper,with focus placed on the DC-link voltage timescale.A stability criterion for grid-connected PMSG-based wind farms under uncertain wind speed conditions is proposed based on the Routh-Hurwitz criterion.Firstly,a Weibull distribution model for wind speed is established,along with a power characteristic model of the PMSG and a dynamic equivalent state-space model of the large-scale wind farm,in which the DC-link voltage control loop and the phase-locked loop(PLL)are incorporated.Secondly,the stability probability of the wind farm is calculated,and the influence mechanisms of wind speed distribution,DC-link voltage outer loop control parameters,and PLL control parameters on the small-signal oscillation stability of the wind farm at the DC-link voltage timescale are thoroughly investigated.Finally,the correctness of the theoretical derivation is validated by modal analysis and time-domain simulations through a case study of a large-scale grid-connected wind farm comprising 260 wind turbines distributed across three sub-wind farms.It is found that the risk of wind farm instability is increased with wind speed,while the stability probability of the wind farm is enhanced as the system's critical stable wind speed is raised.The relevant conclusions can be provided as a basis for the planning of large-scale PMSG-based wind farms.关键词
直驱风电场/小干扰稳定/直流电压时间尺度/直流电压外环/锁相环(PLL)/Weibull分布Key words
direct-drive wind farms/small-signal stability/DC voltage time scale/DC voltage outer-loop/phase-locked loop(PLL)/Weibull distribution分类
信息技术与安全科学引用本文复制引用
袁国富,杜文娟,王海风..风机出力变化下直驱风电场小干扰稳定性分析[J].电力工程技术,2025,44(5):35-45,11.基金项目
国家自然科学基金资助项目(52077144) （52077144）
