摘要
针对直驱式永磁同步风电机组在控制中存在的一些不确定性因素,如因机舱温度升高使得永磁同步发电机的固有参数发生变化以及风速变化引起的扰动等,提出一种鲁棒变结构的控制策略,结合基于定子磁链定向的单位功率因数控制,并依据电压锁相原理实现了定子磁链的位置观测。与传统的控制方案相比,不仅可以实现单位功率因数控制,获得较好的跟踪精度及动态品质,而且依据所提方法设计的鲁棒变结构控制器能够使整个闭环系统全局稳定,且具备较强的鲁棒性。
Because uncertainty exists in direct-drive permanent magnet synchronous wind turbine(D-DPMSWT), a robust variable structure control strategy is proposed, combining unit power factor based on stator flux-orientation, to observe stator flux position according to voltage phase locking theory. Compared with traditional control strategy, unit power factor control, better tracking precision and dynamic quality are realized. With the robust variable structure controller designed in this paper, whole closed-loop system is globally stable with stronger robustness.
出处
《电网技术》
EI
CSCD
北大核心
2018年第2期524-532,共9页
Power System Technology
关键词
直驱永磁风电机组
鲁棒变结构
单位功率因数
锁相环
鲁棒性
direct-drive permanent magnet synchronouswind turbine (D-DPMSWT)
robust variable structure (RVS)
unit power factor control (UPFC)
phase-locked loop (PLL)
robustness