A Hybrid Three-Level ZVZCS Converter for Photovoltaic Power Connecting to MVDC Collection System

Xiaokun He; Renjie Hu; Wu Chen

doi:10.3390/en15155365

Energies (Jul 2022)

A Hybrid Three-Level ZVZCS Converter for Photovoltaic Power Connecting to MVDC Collection System

Xiaokun He,
Renjie Hu,
Wu Chen

Affiliations

Xiaokun He: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Renjie Hu: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Wu Chen: School of Electrical Engineering, Southeast University, Nanjing 210096, China

DOI: https://doi.org/10.3390/en15155365
Journal volume & issue: Vol. 15, no. 15
p. 5365

Abstract

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Compared with the medium voltage ac (MVAC) collection system, the medium voltage dc (MVDC) one for renewable energy sources has many advantages. High-power dc/dc converters are one of the key stages of the MVDC collection system to boost the voltage generated by photovoltaic or wind turbine. A novel hybrid three-level dc/dc converter utilizing a blocking capacitor to realize zero-voltage zero-current-switching (ZVZCS) is proposed. A higher overall efficiency can be achieved by reducing conduction losses. Detailed experimental results on a scaled-down hardware prototype rated at 150 V/750 V/1 kW are demonstrated to verify the proposed converter performance.

Published in Energies

ISSN: 1996-1073 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology
Website: http://www.mdpi.com/journal/energies

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