一种新型高增益非隔离准Z源双极性对称输出DC–DC变换器

This article proposes a single-switch, high-voltage-gain quasi $Z$ -source (qZS) dc–dc converter that employs voltage multiplier techniques to boost the voltage gain and deliver a bipolar output. The proposed topology ensures a continuous input current (CIC) and provides a common ground (CG) between the input and output, while limiting the semiconductor voltage stress to half of the total output voltage. A 256-W prototype with ± 360-V output demonstrates a voltage gain of 11.5 and an efficiency of 93.4%. Theoretical analysis, experimental verification, and a comprehensive comparison study with the state-of-the-art converters substantiate the performance advantages of the proposed design. With its high-voltage gain, common grounding, CIC, and single-switch self-balancing configuration, the converter is ideally suited as an interface for renewable energy sources (RESs), such as photovoltaic (PV) systems and bipolar dc microgrids.