Energy Storage and Smart Energy Systems

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Henrik Lund
Poul Alberg Østergaard
http://orcid.org/0000-0002-6796-6526
David Connolly
http://orcid.org/0000-0001-7134-8803
Iva Ridjan
Brian Vad Mathiesen
http://orcid.org/0000-0003-3917-1184
Frede Hvelplund
http://orcid.org/0000-0002-3213-9520
Jakob Zinck Thellufsen
http://orcid.org/0000-0001-6119-4572
Peter Sorknæs
http://orcid.org/0000-0001-5095-9146

Abstract

It is often highlighted how the transition to renewable energy supply calls for significant electricity storage. However, one has to move beyond the electricity-only focus and take a holistic energy system view to identify optimal solutions for integrating renewable energy. In this paper, an integrated cross-sector approach is used to determine the most efficient and least-cost storage options for the entire renewable energy system concluding that the best storage solutions cannot be found through analyses focusing on the individual sub-sectors. Electricity storage is not the optimum solution to integrate large inflows of fluctuating renewable energy, since more efficient and cheaper options can be found by integrating the electricity sector with other parts of the energy system and by this creating a Smart Energy System. Nevertheless, this does not imply that electricity storage should be disregarded but that it will be needed for other purposes in the future.

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