Abstract

Abstract Martin Linge offshore gas field (formerly named Hild) is located on the Norwegian sector of the North Sea, southwest from Oseberg. The field development comprises a platform with a jack up rig and Floating Storage Offloading unit. This offshore development will be supplied with electric power from shore, through a High Voltage AC submarine cable. With a step out distance of 170km and a design power of 55MW, this will be the world's longest AC submarine cable power supplying an entire offshore Oil and Gas platform from the shore. This paper presents the Martin Linge project, it discusses the criteria considered to select a power from shore instead of an offshore Gas Turbine power plant which is the current practice in the offshore Oil and Gas industry. And since in a first approach, for such long step-out distance, the choice of power from shore would be to select a DC transmission line, the paper discusses the design, system approach and main technical challenges of this long step-out AC transmission development. Finally, the paper gives an operator's viewpoint as to the way forward.

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