低复杂度永磁同步电机三矢量固定开关频率模型预测电流控制策略  

Low-complexity Three-vector Model Predictive Current Control With Fixed Switching Frequency for PMSM

作　　者：陈荣[1] 舒胡平 翟凯淼 CHEN Rong;SHU Huping;ZHAI Kaimiao(College of New Energy,China University of Petroleum,Qingdao 266000,Shandong Province,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东省青岛市266000

出　　处：《中国电机工程学报》2024年第9期3710-3721,I0032,共13页Proceedings of the CSEE

摘　　要：针对传统永磁同步电机(permanent magnet synchronous motor,PMSM)三矢量模型预测电流控制(three-vector model predictive current control,TV-MPCC)存在开关频率不固定和计算复杂的问题,提出一种固定开关频率TV-MPCC策略。利用前一周期的零电压矢量和参考电压矢量所在扇区来快速筛选所需最优电压矢量和次优电压矢量,避免了无效枚举计算,从而降低了开关频率和计算复杂度。引入系统d和q轴电流差参数,计算各电压矢量的作用时间,确保电压矢量作用时间恒大于零和开关频率固定。以三相两电平电压型逆变器驱动的表贴式PMSM为被控对象,通过仿真和实验对传统TV-MPCC策略和所提三矢量固定开关频率模型预测电流控制策略进行对比研究,仿真和实验结果表明,所提策略在保证系统稳态和动态性能的基础上,在固定和降低开关频率的同时,降低了计算复杂度。To solve the problems of unfixed switching frequency and high computational complexity of the traditional three-vector model predictive current control(TV-MPCC)strategy for permanent magnet synchronous motor(PMSM),a fixed switching frequency three-vector model predictive current control(FSF-TV-MPCC)strategy is proposed,which avoids the invalid enumeration calculation and reduces the switching frequency and computational complexity by selecting the optimal voltage vector and the sub-optimal voltage vector based on the zero voltage vector of previous cycle and the sector where the reference voltage vector of the current cycle is located.The current difference parameters of d-axis and q-axis are introduced to calculate the action time of the voltage vector,which ensures that the action time of the voltage vector is always greater than zero and the switching frequency is fixed.Taking the surface permanent magnet synchronous motor driven by three-phase two-level voltage source inverter(VSI)as the controlled object,the traditional TV-MPCC and FSF-TV-MPCC are compared through simulation and experiment.The simulation and experiment results show that the FSF-TV-MPCC can reduce the computational complexity and switching frequency,and can fix the switching frequency on the basis of ensuring the steady-state and dynamic performance of the system.

关 键 词：永磁同步电机 模型预测电流控制 三矢量 低计算复杂度 固定开关频率 

分 类 号：TM341[电气工程—电机]