An integrated single-phase DC/AC power converter with step up is an interesting alternative of two-stage architecture. This paper presents a single stage step up inverter with two inputs to simplify the hardware structure and reduce the number of power components. This circuit arrangement can be derived by combining two parallel boost DC/DC converters and a split-capacitor, reducing the cost and power conversion stage. And, the proposed inverter can output AC voltage higher than the input DC voltage only through single-stage conversion, which can satisfy the applications such as photovoltaic power generation systems. Moreover, the two input DC sources can provide power to the load port together or separately, with great flexibility. Furthermore, the proposed converter has the inherent feature of shoot-through immunity, which can further improve the reliability of the system. This article discusses the operating modes and stable performance of the inverter in detail. Finally, an experimental prototype is built to verify the validity of the proposed topology and theoretical analysis.
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