Dual Output and High Voltage Gain DC-DC Converter for PV and Fuel Cell Generators Connected to DC Bipolar Microgrids

This paper introduces a new topology for a <italic>DC-DC</italic> converter with bipolar output and high voltage gain. The topology was designed with the aim to use only one active power switch. Besides the bipolar multiport output and high voltage gain this converter has another importa...

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Detalles Bibliográficos
Autores principales: V. Fernao Pires, Armando Cordeiro, Daniel Foito, J. Fernando A. Silva
Formato: article
Lenguaje:EN
Publicado: IEEE 2021
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Acceso en línea:https://doaj.org/article/9d027ab88d904a91a2d765405e7e165f
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Sumario:This paper introduces a new topology for a <italic>DC-DC</italic> converter with bipolar output and high voltage gain. The topology was designed with the aim to use only one active power switch. Besides the bipolar multiport output and high voltage gain this converter has another important feature, namely, it has a continuous input current. Due to the self-balancing bipolar outputs, the proposed topology is suitable for bipolar <italic>DC</italic> microgrids. Indeed, the topology balancing capability can achieve the two symmetrical voltage poles of bipolar <italic>DC</italic> microgrids. Furthermore, it is possible to create a midpoint in the output of the converter that can be directly connected to the ground of the <italic>DC</italic> power supply, avoiding common-mode leakage currents in critical applications such as transformerless grid-connect <italic>PV</italic> systems. The operating principle of the proposed topology will be supported by mathematical analysis. To validate and verify the characteristics of the presented topology, several experimental results are shown.