In this study, a new topology for Z-source inverter is proposed without adding additional passive elements to the conventional impedance network. The proposed topology is double-fed and can generate high voltage gain in comparison with the conventional Z-source inverters. By using improved simple boost modulation technique, the function of boost factor in the proposed inverter is general and variable. In other words, not only the boost factor of the proposed inverter depends on value of shoot-through (ST) duty cycle but also is dependent on the value of switching factor and controllable by changing specific signals in switching pattern. In this study, steady-state analysis of the proposed inverter in different operating modes such as ST operating mode, adjacent-non-ST (A-nST) operating mode and non-A-nST operating mode are presented. Design considerations and critical inductance between proper and improper operations are calculated. Then, the used modulation technique and switching pattern are investigated and comparison between the proposed and conventional inverters from different points of view is done. Finally, simulation results using PSCAD/EMTDC software and experimental results are presented to verify theoretical discussions, derived equations and correct operation of the proposed inverter.

中文翻译：

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具有通用可变高升压因子的双馈双开关有源Z源逆变器

在这项研究中，提出了一种Z源逆变器的新拓扑，而无需在常规阻抗网络中添加额外的无源元件。与传统的Z源逆变器相比，拟议的拓扑是双馈的，并且可以产生高电压增益。通过使用改进的简单升压调制技术，所提出的逆变器中升压因子的功能是通用且可变的。换句话说，提出的逆变器的升压因子不仅取决于直通（ST）占空比的值，而且还取决于开关因子的值，并且可以通过改变开关模式中的特定信号来控制。在这项研究中，提出了在不同运行模式（例如ST运行模式，相邻非ST（A-nST）运行模式和非A-nST运行模式）下逆变器的稳态分析。计算了适当的操作和不正确的操作之间的设计考虑因素和临界电感。然后，研究了所使用的调制技术和开关模式，并从不同的角度比较了所提出的逆变器和常规逆变器。最后，给出了使用PSCAD / EMTDC软件的仿真结果和实验结果，以验证所讨论逆变器的理论讨论，推导方程和正确操作。