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Offshore Network Development to Foster the Energy Transition

Author

Listed:
  • Enrico Maria Carlini

    (Italian Transmission System Operator, Terna S.p.A., 00156 Rome, Italy)

  • Corrado Gadaleta

    (Italian Transmission System Operator, Terna S.p.A., 00156 Rome, Italy)

  • Michela Migliori

    (Italian Transmission System Operator, Terna S.p.A., 00156 Rome, Italy)

  • Francesca Longobardi

    (Italian Transmission System Operator, Terna S.p.A., 00156 Rome, Italy)

  • Gianfranco Luongo

    (Italian Transmission System Operator, Terna S.p.A., 00156 Rome, Italy)

  • Stefano Lauria

    (Department of Astronautics, Electrical and Energy Engineering, “Sapienza” University of Rome, 00184 Rome, Italy)

  • Marco Maccioni

    (Department of Astronautics, Electrical and Energy Engineering, “Sapienza” University of Rome, 00184 Rome, Italy)

  • Jacopo Dell’Olmo

    (Department of Astronautics, Electrical and Energy Engineering, “Sapienza” University of Rome, 00184 Rome, Italy)

Abstract

A growing interest in offshore wind energy in the Mediterranean Sea has been recently observed thanks to the potential for scale-up and recent advances in floating technologies and dynamic cables: in the Italian panorama, the offshore wind connection requests to the National Transmission Grid (NTG) reached almost 84 GW at the end of September 2024. Starting from a realistic estimate of the offshore wind power plants (OWPPs) to be realized off the southern coasts in a very long-term scenario, this paper presents a novel optimization procedure for meshed AC offshore network configuration, aiming at minimizing the offshore wind generation curtailment based on the DC optimal power flow approximation, assessing the security condition of the whole onshore and offshore networks. The reactive power compensation aspects are also considered in the optimization procedure: the optimal compensation sizing for export cables and collecting stations is evaluated via the AC optimal power flow (OPF) approach, considering a combined voltage profile and minimum short circuit power constraint for the onshore extra-high voltage (EHV) nodes. The simulation results demonstrate that the obtained meshed network configuration and attendant re-active compensation allow most of the offshore wind generation to be evacuated even in the worst-case scenario, i.e., the N 1 network, full offshore wind generation output, and summer line rating, testifying to the relevance of the proposed methodology for real applications.

Suggested Citation

  • Enrico Maria Carlini & Corrado Gadaleta & Michela Migliori & Francesca Longobardi & Gianfranco Luongo & Stefano Lauria & Marco Maccioni & Jacopo Dell’Olmo, 2025. "Offshore Network Development to Foster the Energy Transition," Energies, MDPI, vol. 18(2), pages 1-20, January.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:2:p:386-:d:1569324
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    References listed on IDEAS

    as
    1. Asad Rehman & Mohsin Ali Koondhar & Zafar Ali & Munawar Jamali & Ragab A. El-Sehiemy, 2023. "Critical Issues of Optimal Reactive Power Compensation Based on an HVAC Transmission System for an Offshore Wind Farm," Sustainability, MDPI, vol. 15(19), pages 1-19, September.
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