Optimal Switching Sequence Model Predictive Control for Single-Phase Cascaded H-Bridge

Gómez, Pablo J.; Galván, Luis; Galván, E.; Carrasco, J.M.; Vázquez, Sergio

doi:10.1109/iecon48115.2021.9589627

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Given the high complexity of this converter, the majority of these techniques have into consideration the reduction of the control computational burden by limiting the number of converter switching states in real-time. Numerous works have also been proposed for the CHBC using a CCS-MPC approach [71][72][73][74][75]. As reported in various works, modulated strategies tend to be more promising in modular converters than those based on FCS-MPC approaches.…”

Section: Mpc In Converter Topologies Typically Used In Sstsmentioning

confidence: 99%

Model Predictive Control for Solid State Transformers: Advances and Trends

2022

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Due to its high functionality, the solid state transformer (SST) represents an emerging technology with huge potential to replace the conventional low-frequency transformer (LFT) in a wide range of applications, including railway traction, smart grids, and others. On the other hand, model predictive control (MPC) has proven to be a highly promising control approach for several power electronics systems, especially those based on multiple power converters. Considering these facts, over recent years, different MPC techniques have been proposed for different types of SSTs. In addition to that, numerous MPC strategies have also been investigated for various power converters topologies that can be used in SSTs. However, a paper summarizing and discussing MPC strategies in the framework of SSTs has not yet been proposed in the literature, being the main goal of this work. In this paper, all the existing MPC techniques in complete SST topologies will be presented and discussed. In addition, for the sake of the example, an overview of MPC strategies in converter topologies typically used in SSTs will also be presented.

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Section: Mpc In Converter Topologies Typically Used In Sstsmentioning

confidence: 99%

Model Predictive Control for Solid State Transformers: Advances and Trends

2022

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“…One of the most common multilevel converter topologies is the cascaded H-bridge converter (CHB), shown in Figure 1. Cascaded H-bridge converters play a relevant role in applications such as the integration of renewable energy [4][5][6][7], Synchronous Compensator (STATCOM) [8][9][10][11], power distribution applications [12,13] and railway traction systems [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, control techniques [22][23][24] are revised to add triple voltage harmonics or the zero-sequence with the aim of achieving balance. Finally, in some optimal control methods, such as [11,25], the objective functions were modified in order to include the balancing problem, benefitting from the redundancies. New researches are specialized in improving topology efficiency in both balanced and unbalanced situations [26,27].…”

Section: Introductionmentioning

confidence: 99%

Optimization-Based Capacitor Balancing Method with Customizable Switching Reduction for CHB Converters

et al. 2022

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This paper presents a method for switching reduction in cascaded H-bridge converters. Given the wide applicability of this topology, it would be especially desirable to increase its efficiency with switching losses reduction techniques. Since this type of converter requires voltage balancing methods, several modulation methods consider the possibility of combining the balancing and switching reduction goals together. In this paper, a previously disclosed optimization-based balance method was modified further to consider the switching losses in its objective function. Each commutation was penalized in proportion to the phase current and the module voltage, thus avoiding commutations that would produce the most losses but tolerating low-losses commutations. The structure of the original method was maintained so that the algorithm could be applied with minimal change. The results show that it is possible to reduce the switching up to 14% without any noticeable drawback and up to 22% at the cost of a greater DC-link ripple. It is also possible to selectively reduce the effective switching frequency of only some modules, making it significantly low. This extends the adaptability of the converter, possibly allowing hybrid converters with modules of different transistor technologies.

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