 Its construction was linked to that of Hunterston A nuclear power station , to store surplus night @-@ time nuclear generated electrical energy . The power station was originally operated by the North of Scotland Hydro @-@ Electric Board , before being transferred to the South of Scotland Electricity Board . It has been owned by Scottish Power since the privatisation of Britain 's electricity industry in 1990 , and they are looking to increase capacity to 1 @,@ 040 MW . 
