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首页> 外文期刊>Journal of power electronics >Two Modified Z-Source Inverter Topologies - Solutions to Start-Up Dc-Link Voltage Overshoot and Source Current Ripple
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Two Modified Z-Source Inverter Topologies - Solutions to Start-Up Dc-Link Voltage Overshoot and Source Current Ripple

机译：两个改进的Z源逆变器拓扑 - 启动DC-Link电压过冲和源电流波纹的解决方案

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摘要

This paper proposes two modified Z-source inverter topologies, namely an embedded L-Z-source inverter (EL-ZSI) and a coupled inductor L-Z source inverter (CL-ZSI). The proposed topologies offer a high voltage gain with a reduced passive component count and reduction in source current ripple when compared to conventional ZSI topologies. Additionally, they prevent overshoot in the de-link voltage by suppressing heavy inrush currents. This feature reduces the transition time to reach the peak value of the de-link voltage, and reduces the risk of component failure and overrating due to the inrush current. EL-ZSI and CL-ZSI possess all of the inherent advantages of the conventional L-ZSI topology while eliminating its drawbacks. To verify the effectiveness of the proposed topologies, MATLAB/Simulink models and scaled down laboratory prototypes were constructed. Experiments were performed at a low shoot through duty ratio of 0.1 and a modulation index as high as 0.9 to obtain a peak de-link voltage of 53 V. This paper demonstrates the superiority of the proposed topologies over conventional ZSI topologies through a detailed comparative analysis. Moreover, experimental results verify that the proposed topologies would be advantageous for renewable energy source applications since they provide voltage gain enhancement, inrush current, de-link voltage overshoot suppression and a reduction of the peak to peak source current ripple.
机译：本文提出了两个改进的Z源逆变器拓扑，即嵌入式L-Z源逆变器（EL-ZSI）和耦合电感器L-Z源逆变器（CL-ZSI）。与传统的ZSI拓扑相比，所提出的拓扑提供高电压增益，具有减少的无源元件计数和源电流纹波的减小。另外，它们通过抑制重浪涌电流来防止在去链路电压中过冲。该特征减小了转换时间以达到去链路电压的峰值，并降低组件故障和由于浪涌电流而过度的风险。 EL-ZSI和CL-ZSI拥有传统L-ZSI拓扑的所有固有优势，同时消除其缺点。为了验证所提出的拓扑，Matlab / Simulink模型和缩小实验室原型的有效性。在低拍摄比率为0.1的低拍摄比率和高达0.9的实验中进行，以获得53 V的峰脱机电压。本文通过详细的比较分析表明了常规ZSI拓扑上所提出的拓扑的优越性。此外，实验结果验证了所提出的拓扑对可再生能源应用是有利的，因为它们提供电压增益增强，浪涌电流，去链路电压过冲抑制和峰值的降低到峰源电流纹波。

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