Research on Four-Phase Interleaved Step-Up DC/DC Converter for Photovoltaic Energy Storage System

Xiaogang Wu; Boyang Yu; Jiuyu Du; Wenwen Shi

doi:10.20944/preprints201904.0202.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 16 April 2019 / Approved: 17 April 2019 / Online: 17 April 2019 (11:40:50 CEST)

Intended for the high voltage gain and wide-range operation of DC/DC converters for photovoltaic energy storage systems, a topology for four-phase interleaved DC/DC converters for photovoltaic power generation is proposed. This topology increases output voltage for output in series, and reduces the input current ripple by paralleling the input. Compared with traditional boost converter topology, the proposed topology reduces the output current and output voltage ripple, reduces the stress of the switching device, and reduces the withstanding voltage of the output capacitor under the premise of ensuring the boost ratio. Experimental results show that the maximum efficiency of the converter reaches 95.37%. Compared with traditional boost converters, the proposed converter offers obvious advantages in efficiency under the conditions that the output voltage and load are variable.

DC-DC converter; photovoltaic energy storage system; high voltage gain; high efficiency

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Research on Four-Phase Interleaved Step-Up DC/DC Converter for Photovoltaic Energy Storage System

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