Equinor submits development plans for Troll West electrification

May 3, 2021

Equinor and partners have submitted a plan for development and operation for Troll West electrification to the minister of petroleum and energy. The decision includes partial electrification of the Troll B platform and full electrification of Troll C in the North Sea. The plan is expected to cut CO2 emissions by almost 500,000 tonnes/year.

Development solution

The subsea cable to Troll B and C platforms will have a landfall at Kollsnes in Øygarden. A high-voltage subsea cable will run from Kollsnes to Troll B, and one from Troll B to Troll C.

Troll West electrification includes full electrification of Troll C, and partial electrification of Troll B. Both platforms’ current power demand will be met from shore. In addition, the two gas export compressors on Troll C currently driven by gas turbines will be replaced by electric motors. Infrastructure at Kollsnes and cable out to the platform will be designed for a possible future full electrification also of Troll B.

The Troll A platform was the first electrified installation on the Norwegian continental shelf. 

Aker Solutions has been awarded an engineering, procurement, construction, and installation contract for modifications enabling Troll B and C topsides to receive power from shore. 

Skanska was let a contract for construction of a new transformer substation, cable trenches, and landfall at Kollsnes.

NKT was awarded a contract for production and installation of a high-voltage subsea cable from Kollsnes to Troll B and from Troll B to Troll C.

On Mar. 26, the Ministry of Petroleum and Energy granted Equinor a concession to construct, own, and operate the necessary electrical installations to supply Troll B and C platforms with power from shore.

Troll B will be partially electrified in first-quarter 2024 and Troll C will be fully electrified by second-quarter 2026.

Operator Equinor holds 30.58% interest. Partners are Petoro 56%, Norske Shell 8.1%, Total E&P Norge 3.7%, and ConocoPhillips 1.6%.