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首页> 外文期刊>Electric Power Components and Systems >A New Cascaded Multi-level Inverter Topology with Reduced Number of Components and Charge Balance Control Methods Capabilities
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A New Cascaded Multi-level Inverter Topology with Reduced Number of Components and Charge Balance Control Methods Capabilities

机译：具有减少的组件数量和电荷平衡控制方法功能的新型级联多电平逆变器拓扑

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摘要

In this article, a new basic unit for cascaded multi-level inverter is proposed. This inverter is able to increase the number of output voltage levels and reduces the number of power electronic devices. To generate all voltage levels at the output, five different algorithms to determine the magnitude of DC voltage sources are suggested. This inverter is compared with conventional cascaded multilevel inverters. The comparisons show that the proposed topology needs fewer DC voltage sources and power switches, less variety of the magnitude of DC voltage sources, and smaller amounts of blocked voltage by switches. As a result, the installation space and total cost of the inverter decrease. As it is impossible to use charge balance control methods for the asymmetric cascaded multi-level inverters, the developed topology based on the proposed cascaded inverter-the sub-symmetric topology with the usability of charge balance control methods-is proposed. A new algorithm is proposed to determine the magnitude of DC voltage sources. In addition, full-wave and half-wave charge balance control methods are applied in the proposed developed topology. The accurate performance of the proposed topology by applying charge balance control methods is verified through the simulation and experimental results of an 81-level sub-symmetric inverter.
机译：本文提出了一种用于级联多电平逆变器的新基本单元。该逆变器能够增加输出电压电平的数量并减少电力电子设备的数量。为了在输出端生成所有电压电平，建议使用五种不同的算法来确定直流电压源的大小。将该逆变器与传统的级联多电平逆变器进行了比较。比较结果表明，提出的拓扑需要更少的直流电压源和电源开关，更少的直流电压源大小变化以及更少的开关阻塞电压。结果，减小了逆变器的安装空间和总成本。由于不对称级联多电平逆变器不可能使用电荷平衡控制方法，因此提出了一种基于所提出的级联逆变器的拓扑结构，即具有电荷平衡控制方法可用性的亚对称拓扑结构。提出了一种确定直流电压源大小的新算法。另外，全波和半波电荷平衡控制方法被应用在所提出的拓扑中。通过81级次对称逆变器的仿真和实验结果，验证了通过应用电荷平衡控制方法所提出的拓扑的准确性能。

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