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New mixed stacked multicell converter with interesting advantages

机译：新型混合堆叠多节电池转换器具有有趣的优势

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摘要

Multilevel converters are very interesting alternatives for medium and high-power applications. This study presents a new configuration of multicell converters. The main advantages of the proposed converter, in comparison with conventional flying capacitor multicell (FCM) and stacked multicell (SM) converters, are doubling the number of output voltage levels and the root mean square (RMS), improving the output voltage frequency spectrum and lowering the number and rating of components and decreasing the converter losses. Furthermore, the stored energy and rating of flying capacitors will be decreased to half in this topology in comparison with FCM and SM converters. These improvements are achieved by adding only four low-frequency switches to the conventional SM converters configuration. In this topology, the number of highfrequency switches is decreased while the voltage ratings of them during a full cycle are kept constant. Also, a modified phase shifted pulse-width-modulation-based control method has been applied to the proposed topology, which can decrease the harmonic distortions and THD. The circuit is simulated using PSCAD/EMTDC software and simulation results are presented to validate the effectiveness and advantages of the proposed configuration. In addition, the experimental results of proposed configuration prototype have been presented to examine its practicability.
机译：多电平转换器是中高功率应用中非常有趣的替代产品。这项研究提出了一种多单元转换器的新配置。与传统的快速电容器多电池（FCM）和堆叠式多电池（SM）转换器相比，该转换器的主要优点是输出电压电平和均方根（RMS）的数量加倍，从而改善了输出电压频谱和减少了元件的数量和等级，并降低了转换器损耗。此外，与FCM和SM转换器相比，此拓扑中的存储能量和快速电容器的额定值将减少一半。这些改进是通过在常规SM转换器配置中仅添加四个低频开关来实现的。在这种拓扑结构中，高频开关的数量减少了，而它们在整个周期内的额定电压保持不变。此外，一种改进的基于相移脉宽调制的控制方法已应用于所提出的拓扑结构，可以减少谐波失真和THD。使用PSCAD / EMTDC软件对电路进行了仿真，并给出了仿真结果，以验证所提出配置的有效性和优势。此外，提出了配置原型的实验结果，以检验其实用性。

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  • 来源
    《Power Electronics, IET》 |2012年第8期|p.1298-1304|共7页
  • 作者

    Sadeghi M.; Hosseini S.H.; Alizadeh R.; Banaei M.R.;

  • 作者单位

    Faculty of Electrical and Computer Engineering, University of Tabriz, 29 Bahman Blvd., Tabriz 51666, Iran. Tabriz Electric Power Distribution Company, Tabriz, Iran;

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