In this article, a new nonisolated high step-up quasi Z-source (QZS) dc–dc converter with coupled inductor techniques is presented, which is suitable for renewable applications. The main advantages of the proposed topology are continuous input current, common ground between load and input dc source, low normalized voltage stress on the semiconductors (switch/diodes), and low total voltage stress on devices compared to the conventional QZS converter. However, increasing the turns ratio value of the coupled inductor windings not only limit the duty cycle but also leads to decrease the voltage stress on switch/diodes and increase the output voltage level. The operating performance of the proposed converter, theoretical analysis and comparison between the proposed converter and other published works (i.e., QZS converters) are provided. Finally, one prototype at 500 W is built and tested, which shows experimental results and theoretical analysis verify each other well.

中文翻译：

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一种新型耦合电感非隔离高升压准Z源DC-DC转换器

在本文中，介绍了一种采用耦合电感技术的新型非隔离式高升压准 Z 源 (QZS) dc-dc 转换器，该转换器适用于可再生能源应用。与传统 QZS 转换器相比，所提出拓扑的主要优点是连续输入电流、负载和输入直流电源之间的公共接地、半导体（开关/二极管）上的低归一化电压应力以及器件上的低总电压应力。然而，增加耦合电感绕组的匝数比值不仅会限制占空比，还会导致降低开关/二极管上的电压应力并提高输出电压电平。提供了所提出的转换器的运行性能、所提出的转换器与其他已发表的作品（即 QZS 转换器）之间的理论分析和比较。最后，