双向准Z源逆变器驱动永磁同步电机的快速有限集模型预测控制

双向准Z源逆变器驱动永磁同步电机(PMSM)系统在兼具Z源逆变器和PMSM优点的同时，还可实现能量的双向流动。针对双向准Z源逆变器驱动PMSM系统的特点，提出一种快速矢量选择有限集模型预测电流控制(FCS\|MPCC)策略。由双向准Z源网络直流链电压闭环与PMSM电磁功率前馈生成电感电流参考值，由电机转速闭环生成电机电流参考值。通过预测直通(ST)及非直通(NST)状态下的电感电流值并引入电感电流子代价函数以确定是否选择ST状态，进而实现对直流链电压的控制。在NST状态下，结合空间电压矢量脉宽调制策略，仅使目标电压矢量所在扇区的4个矢量参与PMSM定子电流预测和代价函数计算，以选择最优的开关状态，在实现对PMSM转速控制的同时减小在线计算量。仿真结果表明，所提控制策略可实现对双向准Z源逆变器的升压及PMSM牵引或制动工况下的转速控制，系统具有良好的稳态及动态性能。

Fast Finite Control Set-Model Predictive Control for PMSM Driven by Bidirectional Quasi-Z-Source Inverter

The bidirectional quasi-Z-source inverter (qZSI) driven by permanent magnet synchronous motor (PMSM) not only has the advantages of both the Z-source inverter and the PMSM, but also realizes the bidirectional flow of energy. According to the characteristics of the system, a fast vector selection finite control set-model predictive current control (FCS-MPCC) strategy is proposed. The reference value of inductance current is generated by controlling the DC link voltage of quasi-Z-source network with the electromagnetic power feed forward value of PMSM. The reference motor current is generated by the speed closed-loop control. By predicting the inductor current value and calculating the inductor current subcost function in the shoot-through (ST) case and non-shoot-through (NST) case, either the ST case or NST case is chosen to realize the control of DC link voltage. In the NST case, combined with the space voltage vector pulse width modulation strategy, only the four vectors of the sector where the target voltage vector is located participate in the PMSM stator current prediction and cost function calculation to select the optimal switching state. It can reduce the amount of online calculation while controlling the speed of the PMSM. The simulation results show that the proposed control strategy can realize the boost control of the bidirectional qZSI and the speed control of the PMSM under traction or braking conditions, and the system has good steady state and dynamic performance.