Non-isolated three-port DC/DC converter for ±380V DC microgrids

Han Y, Kaiser J, Ott L, Schulz M, Fersterra F, Wunder B, März M (2016)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2016

Publisher: VDE

Event location: Nürnberg

ISBN: 978-3-8007-4186-1



This paper describes a novel topology for a non-isolated three-port DC/DC-converter. Target application is the connection of various sources and loads, e.g. photovoltaic, batteries and fuel cells, to a three-wire, two-phase ±380 VDC microgrid with center-tapped neutral.

The DC/DC-converter provides a bidirectional power transfer between the DC microgrid, energy sources or storages. The proposed topology can additionally perform power balancing between the positive and negative phase and thus omitting a second DC/DC-converter for balancing. The extended functionality is achieved by using only one coupled inductor.

A prototype DC/DC-converter with a nominal power of 6 kW is introduced which was realized to experimentally verify the proposed topology. Measurement results and performance of this prototype are presented.

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Han, Y., Kaiser, J., Ott, L., Schulz, M., Fersterra, F., Wunder, B., & März, M. (2016). Non-isolated three-port DC/DC converter for ±380V DC microgrids. In IEEE (Eds.), Proceedings of the 2016 PCIM Europe. Nürnberg: VDE.


Han, Yunchao, et al. "Non-isolated three-port DC/DC converter for ±380V DC microgrids." Proceedings of the 2016 PCIM Europe, Nürnberg Ed. IEEE, VDE, 2016.

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