Fenno-Skan 2, the high-voltage direct-current (HVDC) electricity transmission connection between Finland and Sweden, is now is full operation.
Fenno-Skan 2 will improve considerably the functioning of the Nordic electricity market. There has not been sufficient electricity transmission capacity on the border between Finland and Sweden this year. The physical transmission capacity has been about the same as in the previous years, but the electricity market would have required clearly more transmission capacity, which is why some of the capacity of Fenno-Skan 2 was made available to the market during the trial operation period as of Nov. 15.
On Dec. 16, the new electricity transmission connection of 800 MW became fully available to the market, increasing the transmission capacity between Finland and Sweden by 40%.
Fenno-Skan 2 is an 800-MW, 500-kV HVDC electricity transmission connection. The link is 300 km (186 miles), of which the actual submarine cable accounts for 200 km (124 miles). The project was carried out in cooperation between Fingrid Oyj and Svenska Kraftnät for approximately 315 million euros.
ABB of Sweden was responsible for the overall contract for the converter station in Finland. The contract covered the earthwork, a new valve hall, DC converters with foundations, DC and AC bays with their devices, and the control and protection system of the link. At the same time, another converter station was built at the opposite end of the link at Finnböle in Sweden.