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HVDC Italy-Corsica-Sardinia : ウィキペディア英語版 | HVDC Italy–Corsica–Sardinia
The HVDC Italy–Corsica–Sardinia (also called SACOI; Sardinia–Corsica–Italy) is an HVDC interconnection used for the exchange of electric energy between the Italian mainland, Corsica and Sardinia. It is unusual, having more than two converter stations as part of a single HVDC system, and (as of 2012) is one of only two ''Multi-terminal'' HVDC systems in operation in the world (the other multi-terminal scheme being the Quebec – New England Transmission system linking northeastern USA with Quebec in Canada). The scheme is a monopole using a mixture of Overhead line and submarine cable for the 200 kV high voltage conductor, and sea return for the neutral current. The overhead lines and submarine cables are duplicated, with both circuits being installed on the same towers.〔Natale, M., Lane, F.J., Calverley, T.E., The Sardinian–Italian Mainland HVDC interconnection, IEE Conf. Pub No. 22, p42 - Sept 1966.〕 The scheme was constructed in three phases. == Mercury arc system (1968) ==
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