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Open AccessArticle

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
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Energies 2018, 11(2), 357; https://doi.org/10.3390/en11020357
Received: 1 December 2017 / Revised: 25 January 2018 / Accepted: 30 January 2018 / Published: 3 February 2018
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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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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