PV architectures for DC microgrids using buck or boost exclusive microconverters

Conference paper (2015)

Authors

E Marafante External organisation
L.J. Mackay Old - EWI-ESE-DC&S DC systems & Storage
T.G. Hailu Electrical Power Processing
G.R. Chandra Mouli Old - EWI-ESE-DC&S DC systems & Storage
L.M. Ramirez Elizondo Old - EWI-ESE-DC&S DC systems & Storage
P. Bauer Old - EWI-ESE-DC&S DC systems & Storage
Research Group
Old - EWI-ESE-DC&S DC systems & Storage
Copyright: © 2015 E Marafante, L.J. Mackay, T.G. Hailu, G.R. Chandra Mouli, L.M. Ramirez Elizondo, P. Bauer
DOI: https://doi.org/10.1109/PTC.2015.7232733
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Published Date

2015

Language

English

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Research Group

Old - EWI-ESE-DC&S DC systems & Storage

Abstract

DC microgrids can connect directly dc renewable energy sources with increasing amount of dc loads. In this paper it is looked for possible architectures for integrating PV panels into dc microgrids, by means of microconverter strings. Three topologies are considered, featuring only buck microconverters and only boost microconverters, since they promise higher efficiency due to fewer semiconductors in the current path. The topologies under exam are tested with a perturb and observe MPPT, in the cases of abrupt local shading and uneven shading over a solar panels' array. Among the three, the best topology by response time and control ease is found.