Brenntangen - Filtvet
CrossingOperationalNO420 kV1.8 km2018
Also known as:Indre Oslofjord Filtvet – Brenntangen, Indre Oslofjord Filtvet-Brenntangen
Status:Operational
Project Company:Statnett SF
Type:crossing
The Brenntangen–Filtvet link is one of two new 420 kV AC subsea cable links delivered as part of Statnett’s Inner Oslofjord reinforcement, connecting Filtvet in Hurum municipality with the Brenntangen landfall in Vestby municipality (both in Norway). The scheme was driven by the need to replace legacy links (installed in...
Supply Chain (1)
Project Timeline (7)
2018Commercial Operations Full PowerStale
Statnett’s Inner Oslofjord power connection project, which includes the 420 kV subsea AC link between Filtvet in Hurum and Brenntangen in Vestby Municipality (the Brenntangen–Filtvet interconnector), was planned to be completed and enter full operation in 2018, following Nexans’ contract to design, manufacture and install the two new subsea cable systems that replace older links and strengthen security of supply and power exchange capacity.
2018Cable Installation Complete
Cable installation for the Indre Oslofjord link between Filtvet (Hurum) and Brenntangen (Vestby) was completed in 2018, with Nexans Norway installing the final seven 420 kV subsea cables for Statnett. This work, finished before the summer of 2018, replaced older cable systems and formed part of Statnett’s Indre Oslofjord reinforcement project.
1 Jan 2018Cable Installation Start
In 2018, Nexans Norway began installing a new 420 kV subsea cable system comprising seven individual cables between Filtvet (Hurum) and Brenntangen (Vestby) in the Inner Oslofjord, as part of Statnett’s project to replace older cable systems and strengthen the electricity supply to Eastern Norway.
15 Jul 2015Cable Supplier Selected
On 15 July 2015, Statnett selected Nexans as cable supplier for the Inner Oslofjord power connection, which includes the 420 kV subsea link between Filtvet in Hurum and Brenntangen in Vestby Municipality. Under a contract worth around €50 million, Nexans will design, manufacture, test and install two new 420 kV subsea cable systems from its Halden facility, laying them with Statnett’s cable-laying vessel M/S Elektron and protecting them by seabed trenching, with project completion scheduled for 2018.
2014Planning Consent Awarded
Authority: Norges vassdrags- og energidirektorat (NVE) · Licence: Concession for construction and operation of new 420 kV subsea cables and landfall facilities across inner Oslofjord, including the Filtvet–Brenntangen link
Norges vassdrags- og energidirektorat (NVE) granted Statnett a concession for new 420 kV subsea cables across the inner Oslofjord, including the Filtvet–Brenntangen connection between Hurum and Vestby municipalities. The decision authorises construction and operation of seven 420 kV sea cables and two new landfall facilities on each of the Solberg–Brenntangen and Filtvet–Brenntangen links, replacing older installations and improving security of electricity supply to the central Østlandet region.
2011Fid Financial Close
Statnett decided to reinvest in the Inner Oslofjord subsea cable interconnectors, including the Filtvet–Brenntangen (Flesaker–Tegneby) link, as part of a major project to replace ageing 420 kV subsea cable assets. The facilities on the Inner Oslofjord were decided to be reinvested in 2008 and 2011 due to their high age and uncertain technical condition, with the project covering two new 420 kV subsea cable systems on the Filtvet–Brenntangen and Solberg–Brenntangen stretches. Statnett’s board took the investment decision for the Inner Oslofjord subsea interconnectors, with an expected investment value at decision of about NOK 1,109 million, to secure electricity supply to the central Østlandet region, improve reliability, reduce maintenance, and support grid upgrades and power exchange with Sweden.
kr1,109M
Date TBDOnshore Construction Start
As part of Statnett’s Indre Oslofjord reinvestment project, onshore construction works for the Filtvet–Brenntangen 420 kV cable section commenced, including building associated culverts and jointing (muffe) stations at each end of the link to support the new submarine cable installation and replacement of the existing assets.