A2 Review article, literature review, systematic review

Exploiting wind-solar resource complementarity to reduce energy storage need

Open Access publication

Publication Details
Authors: Asfaw Solomon, Child Michael, Caldera Upeksha, Breyer Christian
Publisher: AIMS Press
Publication year: 2020
Language: English
Related Journal or Series Information: AIMS Energy
Volume number: 8
Issue number: 5
Start page: 749
End page: 770
Number of pages: 22
ISSN: 2333-8326
eISSN: 2333-8334
JUFO-Level of this publication: 1
Open Access: Open Access publication


Resource complementarity carries significant benefit to the power grid
due to its smoothing effect on variable renewable resource output. In
this paper, we analyse literature data to understand the role of
wind-solar complementarity in future energy systems by evaluating its
impact on variable renewable energy penetration, corresponding
curtailment, energy storage requirement and system reliability. Results
show that wind-solar complementarity significantly increases grid
penetration compared to stand-alone wind/solar systems without the need
of energy storage. However, as capacity increases, the capability of
complementarity to increase grid penetration approaches its limit due to
the reduced matching of output to the load profile and pursuant
increase in excess generation. Thus, achieving very high penetration
requires appropriately designed energy storage and curtailment. Yet,
even at higher grid penetration, complementarity carries significant
multidimensional benefits to the power system. The most important
observation was the achievement of very high grid penetration at reduced
energy storage and balancing requirements compared to
stand-alone systems. Researchers reported that using the same energy
storage capacity, wind-solar complementarity led to significantly higher
penetration of up to 20% of annual demand compared to stand-alone
systems. In addition, by coupling to curtailment as an enabler, and
related dispatch flexibility that comes with storage application, lower
balancing capacity need was reported at higher penetration. Wind-solar
complementarity was also found to reduce ramping need while contributing
to improved system adequacy. Complementarity from other dispatchable
renewable resources further reduces storage need and curtailment and
improve system reliability, whereas power grid integration and relative
cost changes allow for further optimisation while transitioning to 100%
renewable energy.

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Last updated on 2020-04-11 at 08:41

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