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Peak shaving with photovoltaic-battery systems

: Braam, F.; Hollinger, R.; Llerena Engesser, M.; Müller, S.; Kohrs, R.; Wittwer, C.


Institute of Electrical and Electronics Engineers -IEEE-; Institute of Electrical and Electronics Engineers -IEEE-, Power & Energy Society -PES-:
5th IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT 2014. Vol.1 : Istanbul, Turkey, 12 - 15 October 2014
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4799-7721-5
ISBN: 978-1-4799-7720-8
Innovative Smart Grid Technologies Conference Europe (ISGT) <5, 2014, Istanbul>
Conference Paper
Fraunhofer ISE ()
Elektrische Energiesysteme; Energieeffiziente Gebäude; Systemintegration und Netze - Strom; Wärme; Gas; Speichertechnologien; Smart Home Technologien; IKT für Komponenten im Smart Grid; Batteriesysteme; Management; Grids; system analysis

With the steady growth of the photovoltaic market over the last decade, the feed-in of photovoltaic-generators may strain the electricity grid, especially in rural areas. Storage devices are expected to smooth over the non-simultaneous production of volatile renewable energies and their consumption. In this paper, we investigate to what extent domestic photovoltaic-battery systems can compensate the capping of the feed-in power by buffering the peak energy. The Fraunhofer Institute for Solar Energy Systems (ISE) in Freiburg, Germany, has developed a novel forecast-based control scheme for photovoltaic-battery systems. It estimates the photovoltaic excess energy and derives a charging schedule for the battery to store the energy from the photovoltaic peak-production. The maximal self-consumption of the locally produced renewable energy is thereby not affected. We show that the maximal photovoltaic feed-in power can be reduced from 70 % to 60 % of the nominal photovoltaic power without losses.