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Z-source-based multilevel inverter with reduction of switches

机译：基于Z源的多电平逆变器，减少了开关

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摘要

This study presents a new inverter topology based on mixture of cascaded basic units and one H-bridge unit. The basic unit includes one Z source, one DC voltage source and two switches generating two voltage levels. The cascaded basic units produce positive and zero-voltage levels and in the same time suggested inverter obtains positive, zero- and negative voltage levels, as a result the number of power semiconductor switches is reduced with respect to traditional multilevel inverters. In this topology, output voltage amplitude is not limited to DC sources voltage summation similar to traditional cascaded multilevel inverters and can be boosted with Z network shoot-through state control; therefore other DC/DC converters are not needed and it is more reliable against short circuit. Besides as compared with traditional Z-source inverter, total harmonic distortion of injected voltage is decreased in the suggested inverter topology. The performance of proposed topology and its controller are validated with simulation results using MATLAB/SIMULINK software and the validity of the proposed multilevel inverter-based Z source is verified by experimental results.
机译：本研究提出了一种基于级联基本单元和一个H桥单元混合的新型逆变器拓扑。基本单元包括一个Z源，一个DC电压源和两个产生两个电压电平的开关。级联的基本单元产生正电压电平和零电压电平，同时建议逆变器获得正电压电平，零电压和负电压电平，因此与传统的多电平逆变器相比，功率半导体开关的数量减少了。在这种拓扑中，输出电压幅度不限于类似于传统的级联多电平逆变器的直流电源电压求和，并且可以通过Z网络直通状态控制来提高；因此，不需要其他的DC / DC转换器，它对短路更可靠。除了与传统的Z源逆变器相比，在建议的逆变器拓扑中还降低了注入电压的总谐波失真。使用MATLAB / SIMULINK软件通过仿真结果验证了所提出的拓扑及其控制器的性能，并通过实验结果验证了所提出的基于多电平逆变器的Z源的有效性。

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