Patent ID: 7772715

Claim:
A power-station installation comprising: a power-generating unit having a power-source machine and at least one generator, the power-source machine including an expansion turbine configured to drive a first generator of the at least one generator; a pressure storage volume; a compressor unit having at least one compressor and at least one motor, the compressor unit configured to charge the pressure storage volume with a gas; and a controller configured to feed the expansion turbine with the gas from the pressure storage volume charged by the compressor unit such that power is generated in the first generator, wherein a single, common grid connection transformer having a primary and a secondary is arranged for coupling the at least one motor and the at least one generator to a high-voltage electricity grid, the primary of the grid connection transformer being connectable to the high-voltage electricity grid, and a power-generating unit or a compressor unit being selectively connectable to the secondary of the grid connection transformer via switching apparatuses.