Cascaded bridgeless totem-pole multilevel converter with model predictive control for 400 V dc-powered data centers

A cascaded bridgeless totem-pole multilevel converter and its model predictive control (MPC) are proposed for the power interface of 400 V dc-powered data centers. Wide bandgap devices such as gallium nitride (GaN) or silicon carbide (SiC) MOSFETs with very low reverse recovery charge are utilized in the proposed totem-pole converter to reduce the switching loss. DC bus voltage error can be effectively mitigated by adopting the proposed MPC strategy when compared with a conventional proportional-integral (PI) control; the proposed MPC also exhibits smaller overshoot and much faster response when the load changes, and can operate at lower switching frequencies, thus further reducing switching losses. Furthermore, it is easier to balance the dc-bus voltages in each module using the proposed MPC control. The simulation and hardware-in-loop test results of conventional PI and proposed MPC controllers are presented to validate the effectiveness of the proposed converter and its control algorithm.

[1]  Zhan Wang,et al.  High-efficiency True Bridgeless Totem Pole PFC based on GaN HEMT: Design Challenges and Cost-effective Solution , 2015 .

[2]  Dylan Dah-Chuan Lu,et al.  ZCS Bridgeless Boost PFC Rectifier Using Only Two Active Switches , 2015, IEEE Transactions on Industrial Electronics.

[3]  Fred C. Lee,et al.  Common mode EMI reduction technique for interleaved MHz critical mode PFC converter with coupled inductor , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[4]  Mostafa Mosa,et al.  High-Performance Predictive Control of Quasi-Impedance Source Inverter , 2017, IEEE Transactions on Power Electronics.

[5]  Xu She,et al.  Control and Design of a High Voltage Solid State Transformer and its Integration with Renewable Energy Resources and Microgrid System , 2013 .

[6]  Alireza Nami,et al.  Modular Multilevel Converters for HVDC Applications: Review on Converter Cells and Functionalities , 2015, IEEE Transactions on Power Electronics.

[7]  B. Reese,et al.  High voltage, high power density bi-directional multi-level converters utilizing silicon and silicon carbide (SiC) switches , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[8]  G. Ortiz,et al.  10kV SiC-based isolated DC-DC converter for medium voltage-connected Solid-State Transformers , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).

[9]  H. Alan Mantooth,et al.  Optimizing efficiency and performance for single-phase photovoltaic inverter with dual-half bridge converter , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).

[10]  H. Alan Mantooth,et al.  Control strategy of high power converters with synchronous generator characteristics for PMSG-based wind power application , 2016, 2016 IEEE Applied Power Electronics Conference and Exposition (APEC).

[11]  Zhengyu Lu,et al.  Totem-Pole Boost Bridgeless PFC Rectifier With Simple Zero-Current Detection and Full-Range ZVS Operating at the Boundary of DCM/CCM , 2011, IEEE Transactions on Power Electronics.

[12]  Maryam Saeedifard,et al.  Operation, Control, and Applications of the Modular Multilevel Converter: A Review , 2015, IEEE Transactions on Power Electronics.

[13]  Fred C. Lee,et al.  Operation analysis of digital control based MHz totem-pole PFC with GaN device , 2015, 2015 IEEE 3rd Workshop on Wide Bandgap Power Devices and Applications (WiPDA).

[14]  Feng Yu,et al.  Dynamic Performance Evaluation of a Nine-Phase Flux-Switching Permanent-Magnet Motor Drive With Model Predictive Control , 2016, IEEE Transactions on Industrial Electronics.