ABB Supplies HVDC Subsea Power Transmission System in Finland
ABB, the leading power and automation technology group, has won an order worth around $130 million from Kraftnät Åland AB to supply a new power transmission link between the Finnish mainland and Åland.
The high-voltage direct current (HVDC) transmission system will be capable of transmitting 100 MW (megawatts) of electricity with minimum losses across a distance of 158 kilometers.
The Åland archipelago, an autonomous Finnish province at the entrance to the Gulf of Bothnia in the Baltic Sea, presently receives its power through an AC (alternating current) cable from Sweden and local renewable sources. The existing fossil fueled power generation backup facility will be closed down once the new link is in operation. Apart from resolving the supply issue and reducing dependence on fossil fuels, the HVDC Light® link will enhance the contribution of renewables to the grid and help Finland reach its emission reduction targets.
“The link will enable the integration of more renewable energy, provide security of power supply and grid reliability to Åland,” said Brice Koch, head of ABB’s Power Systems division. “Our in-house manufacturing capability for converters, cables and semiconductors – the key components for HVDC – combined with our global track record will help us to deliver a best-in-class solution.”
ABB will design, engineer, supply and commission two 100 MW, ±80 kV (kilovolt) HVDC Light converter stations, one situated in Ytterby, Åland and the other in Nådendal, Finland. Two 80 kilovolt (kV) submarine cables, each 158 km long, will enable the transmission of power. The link is scheduled to become operational in 2015.
The HVDC system incorporates special features such as active AC voltage support providing greater network stability and the unique ‘black-start’ capability, which provides faster grid restoration in the event of a blackout. The system is DC grid enabled, ie, prepared for a multi-terminal configuration, which allows for additional in-feed from stations, such as future wind power plants.
HVDC Light technology enables underground and subsea transmission, and offers several environmental benefits, such as neutral electromagnetic fields, oil-free cables and compact converter stations. It is an ideal solution for connecting remote power sources like renewables to mainland networks, overcoming distance limitations and grid constraints, while ensuring robust performance and minimal electrical losses.
Press Release, December 13, 2012