Statnett to deploy ABB mobile integrated gas-insulated switchgear for 420 kV transmission line in Norway

2014-07-04 - The factory assembled units will provide reliable and flexible power with 50 percent reduction in installation time

ABB will supply integrated gas-insulated switchgear (GIS) that will be deployed in two substations that will provide temporary supply of power to Statnett’s new 420 kV transmission line in northern Norway. The new line that is approximately 500 km in length, has two sections that will run from Ofoten to Balsfjord, and from Balsfjord to Skaidi in Hammerfest. Once the project is completed, the 420 kV switchgear modules will be transferred to the Norwegian ‘emergency reserve’ pool.

The expanded substations are part of Statnett’s investment program to ensure the security of electricity supply in northern Norway. Once in operation, the new 420 kV transmission line will secure a reliable power supply to facilitate industrial growth and production of renewable energy such as wind and hydro in the region. Norway aims to reduce the emissions of greenhouse gasses by 30 percent and to increase the renewable share of total energy consumption to 67.5 percent by year 2020, which will be the highest renewable energy share in Europe(1).

ABB’s scope of supply includes the design, construction and installation of two ELK-3, 420 kV GIS in prefabricated housing during the expansion of two existing substations at Ofoten and Bardufoss. The pre-assembled, trailer mounted, and fully integrated switchgear units provide reliable and flexible power to meet the requirements for quick energization during Statnett’s extensive grid expansions in the region.

The integrated GIS is the ideal solution for Statnett’s requirement for mobility and continuous substation operations. The module equipment can be installed in different network types and is capable of supplying 300 kV and 420 kV networks. The flexible configuration makes it ideal for connecting to cables, high voltage lines and transformers.

Mounted on trailers, the integrated GIS are easily transportable between sites to supply and re-route power throughout the grid expansion project. The two units of integrated GIS include protection relays, control, monitoring and communication devices, as well as auxiliary equipment such as heating, lighting, and air conditioning. As they are fully assembled in the factory, they offer more than fifty percent reduction in installation time compared to conventional GIS installations. The units are scheduled for delivery to the Ofoten and Bardufoss substations for energization in 2015.

(1) Invest in Norway

ABB Homepage image credit:
Claudia Regina under CC license on Flickr.

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