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Optimization of offshore grid planning considering onshore network expansions

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  • Liu, Yang
  • Fu, Yang
  • Huang, Ling-ling
  • Ren, Zi-xu
  • Jia, Feng

Abstract

In the coming years, an extensive development of offshore wind energy will present a clear trend of clustering offshore wind farms (OWFs). Offshore grid is a novel concept proposed to address the problem of connecting OWFs and integrating large offshore wind energy into the regional onshore power system economically and reliably. Compared with traditional electrical systems in large OWFs, the connection of offshore grid demonstrates some new features. This paper presents a tri-level optimization strategy to optimize offshore grid planning while considering onshore network expansions simultaneously. The proposed strategy turns the optimization of these two complicated electrical networks into three nested optimization models: the ‘Point of common coupling (PCC) optimizer’, ‘Offshore substation (OS) optimizer’, and ‘Offshore grid optimizer’. An engineering case from the East China Sea is discussed to illustrate the effectiveness of the proposed methodology. The results show that offshore grid demonstrates better overall economic efficiency and less marine corridor consumption. In addition, the proposed methodology can make the integration of large OWFs more friendly to onshore networks.

Suggested Citation

  • Liu, Yang & Fu, Yang & Huang, Ling-ling & Ren, Zi-xu & Jia, Feng, 2022. "Optimization of offshore grid planning considering onshore network expansions," Renewable Energy, Elsevier, vol. 181(C), pages 91-104.
  • Handle: RePEc:eee:renene:v:181:y:2022:i:c:p:91-104
    DOI: 10.1016/j.renene.2021.08.117
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    References listed on IDEAS

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    1. Gorenstein Dedecca, João & Hakvoort, Rudi A., 2016. "A review of the North Seas offshore grid modeling: Current and future research," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 129-143.
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    Cited by:

    1. Wang, Bangyan & Wang, Xiuli & Wei, Fengting & Shao, Chengcheng & Zhou, Jiahao & Lin, Jintian, 2023. "Multi-stage stochastic planning for a long-term low-carbon transition of island power system considering carbon price uncertainty and offshore wind power," Energy, Elsevier, vol. 282(C).
    2. Magnus Daniel Kallinger & José Ignacio Rapha & Pau Trubat Casal & José Luis Domínguez-García, 2023. "Offshore Electrical Grid Layout Optimization for Floating Wind—A Review," Clean Technol., MDPI, vol. 5(3), pages 1-37, June.
    3. Li, Ming & Luo, Haojie & Zhou, Shijie & Senthil Kumar, Gokula Manikandan & Guo, Xinman & Law, Tin Chung & Cao, Sunliang, 2022. "State-of-the-art review of the flexibility and feasibility of emerging offshore and coastal ocean energy technologies in East and Southeast Asia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).

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