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Anneberg – Skanstull

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New high voltage cables in a tunnel between Danderyd and Hammarby Sjöstad

The tunnel for a new 400 kV cable connection is currently being bored and is one of many ongoing projects in the Stockholm region to strengthen the capacity of the transmission grid to meet the growing need for electricity.

New high voltage cables in a tunnel between Danderyd and Hammarby Sjöstad

The tunnel for a new 400 kV cable connection is currently being bored and is one of many ongoing projects in the Stockholm region to strengthen the capacity of the transmission grid to meet the growing need for electricity.

About Anneberg – Skanstull

The new tunnel is 13.4 km long and connects two substations, Anneberg and Skanstull. The tunnel depth varies between 50 to 100 meters below ground.

With all the necessary permits in place, tunnelling started in February 2020. Along the tunnel stretch, there will be six ventilation shafts. Once the tunnel is in place, installations of high voltage cables will start.

The connection adds to a more stable electricity network in the Stockholm region

The new connection is part of the Stockholm Ström project, in collaboration with Vattenfall and Ellevio. Together, we are building a brand new structure for the transmission grid to meet the region's growing need for stable electricity supplies.

Facts

Tunnel stretch: Danderyd to Hammarby Sjöstad, passing under the central parts of Stockholm on the way

Length: 13.4 km

Tunnel diameter: 5 meters

Tunnel depth: 50-100 meters

Method: Open gripper tunnel boring machine from Herrenknecht

Contractor: JV Hochtief-Implenia

Time Plan

Event When
Start of construction 2020
Construction time Approximately 5 years

City Link – electricity’s new highway

An important part of Stockholms Ström is the new connection City Link, built in four stages with Anneberg - Skanstull as the second stage. City Link will connect the northern and southern Stockholm area, from Hagby in Upplands Väsby to Ekudden in Huddinge.

With City Link in place, electricity can be fed from several directions into the Stockholm area. The first phase of City Link has overhead lines and cables and the second stage a cable tunnel.

Part of the Stockholms Ström project

The new structure has approximately fifty projects with new cables, overhead lines, tunnels and substations in cooperation with Vattenfall and Ellevio.

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