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Energies 2018, 11(2), 357; https://doi.org/10.3390/en11020357

Step-Up Partial Power DC-DC Converters for Two-Stage PV Systems with Interleaved Current Performance

Electronics Engineering Department, Universidad Tecnica Federico Santa Maria, Valparaiso 2390123, Chile
These authors contributed equally to this work.
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Received: 1 December 2017 / Revised: 25 January 2018 / Accepted: 30 January 2018 / Published: 3 February 2018
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Abstract

This work presents a partial power converter allowing us to obtain, with a single DC-DC converter, the same feature as the classical interleaved operation of two converters. More precisely, the proposed topology performs similarly as the input-parallel output-series (IPOS) configuration reducing the current ripple at the input of the system and dividing the individual converters power rating, compared to a single converter. The proposed topology consists of a partial DC-DC converter processing only a fraction of the total power, thus allowing high efficiency. Experimental results are provided to validate the proposed converter topology with a Flyback-based 100 W test bench with a transformer turns ratio n 1 = n 2 . Experimental results show high performances reducing the input current ripple around 30 % , further increasing the conversion efficiency. View Full-Text
Keywords: DC-DC converters; microinverter; string inverter; partial power converters; photovoltaic energy DC-DC converters; microinverter; string inverter; partial power converters; photovoltaic energy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zapata, J.W.; Kouro, S.; Carrasco, G.; Renaudineau, H. Step-Up Partial Power DC-DC Converters for Two-Stage PV Systems with Interleaved Current Performance. Energies 2018, 11, 357.

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