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Dispatchability, energy security, and reduced capital cost in tidal-wind and tidal-solar energy farms

Osman, P, Hayward, JA, Penesis, I ORCID: 0000-0003-4570-6034, Marsh, PJ ORCID: 0000-0003-1515-3117, Hemer, MA, Griffin, D, Sayeef, S, Nader, JP ORCID: 0000-0002-5689-7342, Cossu, R, Grinham, A, Rosebrock, U and Herzfeld, M 2021 , 'Dispatchability, energy security, and reduced capital cost in tidal-wind and tidal-solar energy farms' , Energies, vol. 14, no. 24 , pp. 1-29 , doi:

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The global tidal energy resource for electricity generation is small, and converting tidal kinetic energy to electricity is expensive compared to solar-photovoltaic or land-based wind turbine generators. However, as the renewable energy content in electricity supplies grows, the need to stabilise these supplies increases. This paper describes tidal energy's potential to reduce intermittency and variability in electricity supplied from solar and wind power farms while lowering the capital expenditure needed to improve dispatchability. The paper provides a model and hypothetical case studies to demonstrate how sharing energy storage between tidal stream power generators and wind or solar power generators can mitigate the level, frequency, and duration of power loss from wind or solar PV farms. The improvements in dispatchability use tidal energy's innate regularity and take account of tidal asymmetry and extended duration low-velocity neap tides. The case studies are based on a national assessment of Australian tidal energy resources carried out from 2018 to 2021.

Item Type: Article
Authors/Creators:Osman, P and Hayward, JA and Penesis, I and Marsh, PJ and Hemer, MA and Griffin, D and Sayeef, S and Nader, JP and Cossu, R and Grinham, A and Rosebrock, U and Herzfeld, M
Keywords: capital expenditure, dispatchability, energy storage, intermittent renewable energy, marine energy, solar energy, tidal energy, variable renewable energy, wind energy, complementarity
Journal or Publication Title: Energies
Publisher: MDPI AG
ISSN: 1996-1073
DOI / ID Number:
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Copyright 2021 by the authors. Licensee MDPI, Basel, Switzerland.This article is an open access article distributed under the terms andconditions of the Creative Commons Attribution (CC BY) license (

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