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首页> 外文期刊>Power Electronics, IET >Classification of multilevel converters with a modular reduced structure: implementing a prominent 31-level 5 kVA class B converter
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Classification of multilevel converters with a modular reduced structure: implementing a prominent 31-level 5 kVA class B converter

机译：具有模块化精简结构的多电平转换器的分类：实现出色的31级5 kVA B类转换器

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摘要

Multilevel converters are capable of generating AC voltages with low-total harmonic distortion, applicable to power system applications such as penetration of renewable sources in an active network. These types of topologies may require large number of switches and power supplies, having complex structures along with complicated control algorithms. Recently, a branch of multilevel converters is emerged, in which their ‘reduced structure’ topologies use lower number of devices compared to the available topologies. This study concentrates on classification of the branched ‘multilevel converters’ with a ‘reduced structure’ (MCRS) that lowers the number of semiconductor switches as well as their gate-drivers. Then, these classified structures are compared in terms of their number of power supplies and switches, the number of gate-drivers, breaking voltages of the switches and so on. This will pave the way for the introduction of a structure named B2 in the defined class B among the available MCRS topologies with the lowest number of power electronic devices; this structure is obtained by modifying the structure A2 in the defined class A. Moreover, design and simulation of a 31-level converter is analysed under optimal number of DC sources for all named structures. A laboratory prototype was implemented that verifies operation and performance of the suggested structure B2.
机译：多电平转换器能够产生具有低总谐波失真的交流电压，适用于电力系统应用，例如有源网络中可再生能源的渗透。这些类型的拓扑可能需要大量的开关和电源，具有复杂的结构以及复杂的控制算法。最近，出现了多级转换器的一个分支，其中的“精简结构”拓扑与可用拓扑相比使用较少的设备。这项研究集中于对具有“精简结构”（MCRS）的分支“多级转换器”进行分类，从而减少了半导体开关及其栅极驱动器的数量。然后，根据电源和开关的数量，栅极驱动器的数量，开关的击穿电压等对这些分类的结构进行比较。这将为在功率电子设备数量最少的可用MCRS拓扑中引入定义的B类中名为B2的结构铺平道路。这种结构是通过在定义的A类中修改结构A2来获得的。此外，对于所有命名结构，在最佳直流电源数量下分析了31级转换器的设计和仿真。实施了一个实验室原型，以验证建议结构B2的操作和性能。

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