ABB to Manufacture, Install Gjoa Power Cable

Gjoa Platform
(Click to Enlarge)
Statoil has sent a letter of intent to Swedish company ABB Power Technologies for the manufacture and installation of a power cable from the North Sea's Gjoa field. Power cable laying will begin in 2009, with final tie-in to the field in 2010.

The contract is worth some NOK 500 million and covers engineering, procurements, manufacture and installation. The roughly 100-kilometer-long cable will run from Mongstad, north of Bergen, to the Gjoa platform.

"A solution with power supply from land via cable will have less of an environmental impact compared to a traditional solution with electricity produced at sea," said Bjorn Midttun, who heads subsea and pipelines technology on the Gjoa project.

The reduction in carbon emissions from Gjoa at full production will equate to the emissions from 100,000 cars, provided the field is supplied with power from the Mongstad energy project's (EVM) combined heat and power station (CHP). The cable will be the world's longest for transfer of high-voltage alternating current to floating installations," explained Midttun. "The concept is based on a dynamic high-voltage cable and can be used on other floating installations."

Plans call for the Gjoa field to go onstream in 2010.

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