摘要
为了研究直驱永磁同步风电机组(DDPMSG)次同步振荡问题,建立了完整的风电系统动态数学模型。采用特征值分析方法全面分析了全功率变换器控制器参数对系统振荡模式的影响:将风电系统动态模型在稳定工作点线性化后得到系统的系数矩阵,计算出系统的振荡模式;由于控制器参数个数众多,为了简化分析过程,通过计算参与因子筛选出与系统振荡模式关联度高的控制器参数,在此基础上进一步分析这些控制器参数对系统振荡模式稳定性的影响。分析和仿真结果表明:转速调节器比例系数较小,则易引起轴系扭振;直流电压调节器积分系数过大,则易引起网侧功率的次同步振荡。
In order to study the sub-synchronous oscillation problem of the direct-drive permanent magnet synchronous wind turbine generator （DDPMSG）, a complete dynamic mathematical model of DDPMSG was established. The influence of full power converter controller parameters on the system oscillation mode was analyzed by using the eigenvalue analysis method. The coefficient matrix, obtained by linearizing the wind power system dynamic model on the stable working point, was used for calculating the oscillation modes of the system. Due to the large number of controller parameters and for the sake of simplifying the analysis process, the participation factors were calculated to screen the parameters, which were closer related to the oscillation mode. Based on this, further study of the influence that the controller parameters made on the stability of the system oscillation mode was conducted. Analysis and simulation results showed that the smaller proportional coefficient speed regulator would cause torsional vibration of shaft easily and the greater integral coefficient of DC voltage regulator was easy to cause the sub-synchronous oscillation of the network power.
出处
《电机与控制应用》
北大核心
2017年第1期97-103,共7页
Electric machines & control application
关键词
直驱永磁同步风电机组
次同步振荡
特征值分析
轴系扭振
direct-drive permanent magnet synchronous wind turbine generator （DDPMSG）
sub- synchronous oscillation
eigenvalue analysis
torsional vibration of shaft
