摘要
直驱风电机组并网发了多起新型次同步振荡事件,严重威胁了电力系统的安全稳定运行。为研究直驱风电并网次同步振荡问题,建立了直驱风电并网系统的小信号模型,采用特征值分析方法,筛选主导振荡模态,研究不同参数对系统次同步振荡模态阻尼特性的影响。结果表明,直驱风电并网系统的主导振荡模态为次同步振荡模态,并且次同步振荡模态主要受电流内环影响,增大电流内环比例系数可使系统次同步振荡模态阻尼增加,系统稳定性增强。仿真验证了特征值分析的正确性。
Multiple new types of sub-synchronous oscillation events have occurred when direct-drive wind turbines are connected to the grid,causing serious damage to the safe and stable operation of the power system.To analyze the subsynchronous oscillation problem caused by the grid-connected direct drive wind turbines,a small signal model was established through linearization method.Eigenvalue analysis method was used to screen the dominant oscillation mode and study the influence of different parameters on the damping characteristic of the subsynchronous oscillation mode.The results show that the dominant oscillation mode is the subsynchronous oscillation mode,and the subsynchronous oscillation mode is mainly affected by the current inner loop.Increasing the proportion coefficient of the current inner loop can increase the damping of the subsynchronous oscillation mode and enhance the system stability.The simulation verified the correctness of eigenvalue analysis.
作者
黄世海
刘闯
李昂
张师
HUANG Shi-hai;LIU Chuang;LI Ang;ZHANG Shi(Jilin Operation and Maintenance Branch of State Grid Jilin Ultra High Voltage Company,Changchun 130000,China;State Grid Sichuan Electric Power Company Zizhong County Power Supply Branch,Neijiang 641000,China;College of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China)
出处
《电气开关》
2025年第3期78-81,共4页
Electric Switchgear
关键词
直驱永磁同步发电机
次同步振荡
小信号模型
特征值分析
时域仿真分析
direct-drive PMSG
subsynchronous oscillation
small-signal model
eigenvalue analysis
time domain simulation analysis
