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Deep decarbonization and the supergrid – Prospects for electricity transmission between Europe and China

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  • Reichenberg, Lina
  • Hedenus, Fredrik
  • Mattsson, Niclas
  • Verendel, Vilhelm

Abstract

Long distance transmission within continents has been shown to be one of the most effective variation management strategies to reduce the cost of renewable energy systems. In this paper, we test whether the system cost further decreases when transmission is extended to intercontinental connections. We analyze a Eurasian interconnection between China, Mid-Asia and Europe, using a capacity expansion model with hourly time resolution. Our modelling results suggestthat a supergrid option decreases total system cost by a maximum of 5%, compared to continental grid integration. The maximum cost reductionis achieved when (i) the generation is constrained to be made up almost entirely by renewables, (ii) the land available for VRE farms is relatively limited and the demand is relatively high and (iii) the cost for solar PV and storage is high. This is explained by that a super grid allows for harnessing of remote wind-, solar- and hydro resources demand centers. As for low-cost storage, it represents a competing variation management option, and may substitute part of the role of the supergrid, which is to manage variations through long-distance trade. We conclude that the benefits of a supergrid from a techno-economic perspective are in most cases negligible, or modest at best.

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  • Reichenberg, Lina & Hedenus, Fredrik & Mattsson, Niclas & Verendel, Vilhelm, 2022. "Deep decarbonization and the supergrid – Prospects for electricity transmission between Europe and China," Energy, Elsevier, vol. 239(PE).
    • Handle: RePEc:eee:energy:v:239:y:2022:i:pe:s0360544221025834
    DOI: 10.1016/j.energy.2021.122335
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    1. Fei Guo & Bas J. Ruijven & Behnam Zakeri & Shining Zhang & Xing Chen & Changyi Liu & Fang Yang & Volker Krey & Keywan Riahi & Han Huang & Yuanbing Zhou, 2022. "Implications of intercontinental renewable electricity trade for energy systems and emissions," Nature Energy, Nature, vol. 7(12), pages 1144-1156, December.
    2. Parzen, Maximilian & Abdel-Khalek, Hazem & Fedotova, Ekaterina & Mahmood, Matin & Frysztacki, Martha Maria & Hampp, Johannes & Franken, Lukas & Schumm, Leon & Neumann, Fabian & Poli, Davide & Kiprakis, 2023. "PyPSA-Earth. A new global open energy system optimization model demonstrated in Africa," Applied Energy, Elsevier, vol. 341(C).

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