摘要
传统的永磁同步发电机(permanent magnet synchronous generator,PMSG)模型预测直接转矩控制方法(model predictive direct torque control,MP-DTC)通常在同步旋转dq坐标系上实现预测控制,这导致该算法需要复杂的坐标变换单元,且对发电机的参数变化较敏感。针对这一问题,提出了一种改进的PMSG MP-DTC方法。该方法首先采用全阶滑模观测器在静止坐标系上观测等效反电动势,然后根据观测的等效反电动势和采样的定子电流实现静止坐标系上的定子磁链和转矩预测,从而避免了复杂的坐标变换运算,提高了参数鲁棒性,改善了系统的动态特性。实验结果表明,所提算法有效提高了系统的动态特性和参数鲁棒性,并明显减小了计算负担。
Conventional model predictive direct torque control（MP-DTC） of permanent magnet synchronous generator（PMSG） is usually implemented on the synchronous rotating reference frame. Therefore, it needs a lot of complicated coordinate transformations, and it is sensitive to parameter variations of PMSG. Concerning this issue, an improved MP-DTC method for PMSG is proposed in this paper. Firstly, this method adopts a full order sliding mode observer to observe the equivalent electromotive force on the stationary reference frame. Secondly, the stator flux and torque are predicted on the stationary reference frame based on the observed equivalent electromotive force and the sampled stator currents. Thus, the complicated coordinate transformations are eliminated. As well, the robustness to parameters is enhanced with improved dynamic response. The experimental results show that the dynamic performance and robustness to parameter variations are improved effectively based on the proposed method. Besides, the computation burden is reduced significantly.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第18期5053-5061,5130,共9页
Proceedings of the CSEE
基金
"十二五"国家科技支撑计划重大项目(2012BAA01B04)~~
关键词
永磁同步发电机
模型预测直接转矩控制
同步旋转坐标系
静止坐标系
全阶滑模观测器
permanent magnet synchronous generator（PMSG）
model predictive direct torque control（MP-DTC）
synchronous rotating reference frame
stationary reference frame
full order sliding mode observer
