SwePol HVDC link

The SwePol Link is the latest, and certainly not the last, of the high voltage direct current (HVDC) links between the Nordic countries and the continent. The SwePol Link ties the 400 kV grids in Poland and Sweden together by means of 245 km long cables. SwePol Link's most unique feature is the absence of sea electrodes, as, for the first time, cables are used to carry the return current rather than using earth return.