A 400 kV high-voltage power cable from NKT is now bringing renewable energy from the Letsi hydropower plant to the Swedish power grid after a successful replacement operation.
June 25, 2021
NKT has designed, produced and installed the new 400kV AC single-core XLPE power cable system with power rating of 486MW for the Letsi hydropower plant in Sweden.
Hydropower accounts for nearly half of the electricity supply in Sweden making it a cornerstone in the country’s transition to renewable energy. The Letsi hydropower plant in Northern Sweden is one of the oldest of its kind in the region and with more than five decades of operation it was time to renovate the Letsi hydropower plant in 2019.
NKT was awarded the turnkey replacement project for the power cable system by Vattenfall and has completed the project of designing, producing and installing the new 400 kV AC single-core XLPE power cable system with a power rating of 486 MW.
The execution of the replacement project was done in several stages from draining the oil filled legacy power cables and removing the old terminations, pulling the underground power cable and connecting it to a new transformer. The replacement work came with some major challenges due to the nature of the physical environment in Northern Sweden, but NKT managed to complete the project successfully.
Also Read: NKT Completes Onshore Repair of High-Voltage Power Cable System Kontiskan-1.
The new power cable system was commissioned in June 2021 and is now in operation generating renewable energy for the Swedish power grid.
