BRØNDBY, Denmark – Subsea 7 and NKT have completed installation of the 163-km (101-mi) HV alternating current cable system taking power from the Norwegian mainland to the Martin Linge oil and gas field in the North Sea.
It is the world’s longest submarine HVAC cable installation, NKT claimed.
Operator Equinor and its partners selected the solution to reduce carbon dioxide emissions at the offshore complex by 200,000 metric tons/yr, compared with the alternative of power generators at the production complex.
NKT designed, engineered, and manufactured a 145-kV three-core XLPE HVAC submarine cable and associated fiber optic links with a 55 MW capacity; and a 3.5-km (2.2-mi), 17.5-kV infield cable, which included 500 m (1,640 ft) of dynamic cable.
The dynamic cable connects the platform to an FSO anchored nearby. It was engineered to withstand the dynamic motions.
Last year, NKT commissioned the power from shore power cable solution forPhase 1 of the Johan Sverdrup oil field in the North Sea and entered an agreement with Equinor to design, engineer, produce, and install the power from shore connection for the second-phase development.