Employing both high bandwidth (HBW) controller and wide bandgap (WBG) devices in the structure of converters improve the system size, performance, and efficiency. In this paper, HBW model predictive controllers (MPCs) are proposed, with both fixed and unfixed switching frequencies, to control a single-phase five-level hybrid active neutral-point-clamped (ANPC) inverter. A hybrid modulation technique is considered in this paper, in which some of the switches are modulating with high frequency. Therefore, Silicon-Carbide (SiC) MOSFETs are employed in the converter structure to increase the switching frequency and consequently reduce the filter size and increase converter power density. To have the functionality of multilevel output voltage, some restrictions are defined in the adopted MPC with unfixed switching frequency. In the MPC with the constant switching frequency, predefined switching sequences are employed for all sectors. Moreover, to control the neutral point (NP) voltage, the applied times of both small voltage vectors are sets through a cost function. Finally, the simulation and experimental results prove the ability of both proposed methods to control the voltages of the load and NP.

中文翻译：

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具有单相五电平SiC / Si的ANPC逆变器的电容器电压平衡模型预测控制器

在转换器的结构中同时使用高带宽（HBW）控制器和宽带隙（WBG）器件可改善系统尺寸，性能和效率。本文提出了具有固定和不固定开关频率的HBW模型预测控制器（MPC），以控制单相五电平混合有源中性点钳位（ANPC）逆变器。本文考虑一种混合调制技术，其中一些开关采用高频调制。因此，在转换器结构中采用了碳化硅（SiC）MOSFET，以提高开关频率，从而减小滤波器尺寸并提高转换器功率密度。为了具有多电平输出电压的功能，所采用的MPC在开关频率不固定的情况下定义了一些限制。在具有恒定开关频率的MPC中，所有扇区均采用预定义的开关顺序。此外，为了控制中性点（NP）电压，通过成本函数设置两个小电压矢量的施加时间。最后，仿真和实验结果证明了这两种方法能够控制负载和NP的电压。