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Integrated three-phase PV SiC inverter to increase self-consumption with innovative topology, flexible connection options and high efficiency

: Hensel, A.; Gasser, C.; Schöner, C.; Wienhausen, A.H.


Institute of Electrical and Electronics Engineers -IEEE-:
17th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2015. Vol.4 : 8-10 September 2015, Geneva, Switzerland
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-8277-6
European Conference on Power Electronics and Applications (EPE) <17, 2015, Geneva>
Energy Conversion Congress and Exposition (ECCE) <2015, Geneva>
Fraunhofer ISE ()

The self-consumption of PV-systems can be increased with a battery. The proposed three-phase inverter provides three independent DC inputs that can each be connected to a battery or a PV-string. The innovative topology allows energy flow in each direction at a very high efficiency (> 98 % in each converter stage). The application of SiC transistors leads to a higher switching frequency (48 kHz) compared to commercial systems. The resulting filter elements such as inductors and capacitors are PCB mountable. Thus a highly integrated demonstrator was developed. The system is proposed in detail in this paper.