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A Study of Level-Shifted PWM Single-phase 11-Level Multilevel Inverter

机译：电平转换PWM单相11电平多电平逆变器的研究

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摘要

This paper presents a modified shifted-level pulse width modulation (PWM) for an 11-level multilevel inverter (MLI) that used for distributed generation systems and medium and high power energy conversion systems applications because of the flexibility in the voltage level that this converter has been introduced. This converter employs five independent DC sources to generate the eleven output voltage levels considering a reduced number of switching devices. The proposed switching control arrange the switching devices to synthesize the multilevel output voltage. The MMLI structure consisted of traditional H-Bridge as the main converter and aiding circuit that used to form the multilevel of the output voltage according to the proposed switching technique. The gains of this converter is that it presents a topology for increasing the output voltage levels in the simultaneously with a decrements of the switching devices, the switching losses as well as low level of THD. The validity of the presented MLI are verified by both computer simulation using MATLAB Simulink© and real-time simulation (RTS) with the aid of dSPACE hardware.
机译：本文针对11级多电平逆变器（MLI）提出了一种改进的移位电平脉冲宽度调制（PWM），该逆变器用于分布式发电系统以及中，高功率能量转换系统应用，因为该转换器的电压电平具有灵活性已经介绍了。考虑到减少了开关设备的数量，该转换器采用五个独立的直流电源来生成十一个输出电压电平。所提出的开关控制将开关装置布置为合成多级输出电压。 MMLI结构由传统的H桥作为主转换器和辅助电路组成，根据所提出的开关技术，辅助电路用于形成输出电压的多电平。该转换器的好处在于，它提供了一种拓扑结构，可在降低开关设备，降低开关损耗以及降低THD的同时提高输出电压水平。通过使用MATLAB Simulink©进行的计算机仿真和借助dSPACE硬件的实时仿真（RTS），可以验证所提出的MLI的有效性。

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