Non-isolated three-port DC/DC converter for ±380V DC microgrids
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 8Language: englishTyp: PDF
Personal VDE Members are entitled to a 10% discount on this title
Authors:
Han, Yunchao; Kaiser, Julian; Ott, Leopold; Schulz, Matthias; Fersterra, Fabian; Wunder, Bernd; Maerz, Martin (Fraunhofer IISB, Erlangen, Germany)
Abstract:
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.