The power station is being upgraded to a 420-kilovolt switching station, since the capacity in the grid is being increased from 300 kilovolts to 420 kilovolts to ensure a reliability and full utilisation of energy.
Tjørhom power station is located west of the small town Tjørhom. It is found at the end of a 300-meter-long entry tunnel into a mountain. The nearby reservoirs, Gravatn and Tjørhomvatn, have high capacity that can ensure long uptime.
