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Techno-economic comparison of a schedule-based and a forecast-based control strategy for residential photovoltaic storage systems in Germany

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Abstract

In Germany, the huge integration of small photovoltaic (PV) systems into the distribution grid during the past years leads to power quality issues due to the intermittent generation and reverse power flow in periods of low demand. To decrease this impact, different solutions are being investigated. The scope of this paper is to compare different strategies to control the charge power for residential PV storage systems for different load curves and to decide which might be the economically most profitable strategy. For this purpose, three different PV storage system control strategies were analyzed using MATLAB®to perform 1-year simulations on a minute step base. Measured input data from a PV system in the south of Germany were combined with four measured (extreme) load profiles and a standard load profile to conduct a sensitivity analysis. Performance indicators, such as self-consumption ratio (SCR), self-supply ratio (SSR), and share of losses ratio (SLR), were used to compare the different control strategies. Furthermore, an economic analysis of these results was performed to obtain the profitability of every control strategy and to determine the most profitable strategy, considering the household owner’s benefits.

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Acknowledgments

This work was supported by the German Federal Ministry of Economics and Technology (BMWi) and the Projektträger Jülich GmbH (PTJ) within the framework of the project “SmartPowerFlow” (FKZ0325523A). We thank also the joint research partners from the SMA AG, the Lechwerke Verteilnetze GmbH (LVN) as well as the Younicos AG for their great support. The authors gratefully acknowledge the contributions of the research group Solar Storage Systems of the HTW Berlin.

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Authors and Affiliations

  1. Reiner Lemoine Institut gGmbH, Ostendstraße 25, 12459, Berlin, Germany

    Oscar Camacho Rascon, Matthias Resch & Jochen Bühler

  2. Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany

    Oscar Camacho Rascon

  3. UPC–Universitat Politècnica de Catalunya, Barcelona, Spain

    Matthias Resch & Andreas Sumper

Authors
  1. Oscar Camacho Rascon
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  2. Matthias Resch
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  3. Jochen Bühler
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  4. Andreas Sumper
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Correspondence to Matthias Resch.

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Rascon, O.C., Resch, M., Bühler, J. et al. Techno-economic comparison of a schedule-based and a forecast-based control strategy for residential photovoltaic storage systems in Germany. Electr Eng 98, 375–383 (2016). https://doi.org/10.1007/s00202-016-0429-7

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  • DOI: https://doi.org/10.1007/s00202-016-0429-7

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