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Transmission Projects

The transmission component of the project saw significant progress this past year. Construction was completed on the Labrador-Island Transmission Link travelling 1,100 km from Muskrat Falls in Labrador to Soldiers Pond on the Avalon Peninsula. This achievement marked the completion of all transmission line construction required for the project including the Labrador Transmission Assets and the Strait of Belle Isle Marine Cable Crossing. The final key pieces of electrical equipment, including the massive transformers, rotors and stators, required at Muskrat Falls and Soldiers Pond were safely delivered to each site and installation work began on each. As construction continued to progress on the switchyards and convertors stations, commissioning work began with the energization of completed parts of these sites. The transmission project remains on target to bring power from Labrador to the island in mid-2018.

 

Labrador-Island Link
The Labrador-Island Link (LIL) will carry electricity from the generating facility at Muskrat Falls to the island of Newfoundland. It’s an 1,100 km 900 megawatt High Voltage direct current (HVdc) transmission line running from central Labrador, crossing the Strait of Belle Isle, and extending to Soldiers Pond on the Avalon Peninsula. 

Labrador-Island Link Map

Click on the map above to view an interactive map of the Labrador-Island Link

The transmission project includes building and operating:

  • A converter station at Muskrat Falls to change alternating current (ac) power into direct current (dc) power.
  • 400 km of HVdc transmission line from the Muskrat Falls converter station to the Strait of Belle Isle at Forteau Point.
  • 35 km underwater cable crossing across the Strait of Belle Isle, from Forteau Point, Labrador to Shoal Cove, Newfoundland.
  • 700 km of overhead HVdc transmission line from Shoal Cove to Soldiers Pond, Newfoundland.
  • A converter station at Soldiers Pond to convert the dc power back into ac power for distribution on the island’s electricity grid.
  • Grounding systems, at L’Anse au Diable (on the Labrador side of the Strait of Belle Isle) and at Dowden’s Point (in Conception Bay, Newfoundland).

Strait of Belle Isle Marine Cable Crossing
To connect the transmission line from Labrador to Newfoundland, a 35 km marine cable crossing was constructed across the Strait of Belle Isle, from Forteau Point, Labrador to Shoal Cove,  Newfoundland.

SOBI LIL

The marine cable crossing included the installation of three marine power cables along the seabed across the Strait of Belle Isle. Using horizontal directional drilling (HDD) technology, two drill rigs bore three holes from the shoreline and out under the seabed on both sides of the Straits. Cables were installed through the drilled holes, and placed along the sea floor by a cable installation vessel.

HDD Illustration

 
Labrador Transmission Assets (LTA)
Two, 250 km 315kV High Voltage alternating current transmission lines have been constructed between the existing hydroelectric facility in Churchill Falls and Muskrat Falls. 

Unlike most transmission lines in the province, the Labrador-Island Link will be a High Voltage direct current (HVdc) line, which is more effective for carrying large amounts of power over long distances as well as underwater. It will be converted to High Voltage alternating current (HVac) at the converter station in Soldiers Pond before being added to the provincial grid as power for homes and businesses.

MUSKRAT FALLS PROJECT