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High-voltage direct currentpower lines are mainly used for the energy transfer for distances from 750 km upwards. An example of a large-scale HVDC landline is the HVDC Québec-New England line between Canada and the US with a total length of 1480 km. In Germany, the so-called Südlink-electricity link is planned. It is a project between the German energy network operators TenneT TSO and TransnetBW to establish an 800 km long HVDCpower line in the framework of the “German Netzentwicklungsplan” (energy grid development plan). The aim of the new power line is to transport the current generated by wind plants in the Northern part of Germany to Southern industrial regions.