Analysis of energy variability and costs for offshore wind and hybrid power unit with equivalent energy storage system

Qiang Gao, Rui Yuan, Nesimi Ertugrul, Boyin Ding, Jennifer A. Hayward and Ye Li

Applied Energy, 2023, vol. 342, issue C, No S0306261923005561

Abstract: Offshore wind and wave energy are largely untapped renewable resources. However, the intermittency and the high cost of energy of these resources pose a few major challenges for their wide-scale developments. Although energy storage systems are considered to mitigate or reduce the energy variability to support a reliable power network, the proposed solutions have further increased the capital expenditure. This is primarily due to a lack of systematic techno-economic assessments of offshore renewable systems with energy storage. In addition, the integration of offshore wind and wave energy systems reported in previous literature showed a number of benefits, such as power smoothing and cost reduction. This paper investigates the offshore wind and wave energy intermittency and their dispatchability and proposes an equivalent energy storage system to achieve the same level of energy variability as the combined wind and wave system. This provides a thorough understanding of the power smoothing performance and firmness of energy supply in an offshore energy farm. The economic assessment of the stand-alone offshore wind system, the wind turbine with an energy storage system and the hybrid power unit system are conducted and compared via high-fidelity cost models. In addition, the sensitivities of three system configurations are investigated at multiple locations around the world, which are selected to address typical wind and sea states. The results indicate that the hybrid wind and wave power system has merits in reducing energy variability and enhancing ocean energy dispatchability while offering highly competitive cost, compared to the other two system configurations. Furthermore, the research aims to provide a guidance and support for the developers, investors and policymakers at the pre-planning stage of developing ocean renewable energy systems.

Keywords: Wind energy; Wave energy; Hybrid system; Energy variability; Energy storage system; Techno-economic analysis (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261923005561
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:342:y:2023:i:c:s0306261923005561

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2023.121192

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().