ENERGY STORAGE FACILITY FOR SUPPLYING AN ELECTRICAL NETWORK
The energy storage facility (10) comprises a mechanical energy supply device (12), a reservoir (32) for storage of a pressurized fluid, a pump (16) that can be actuated by the mechanical energy supply device (12), an energy generator (36) capable of converting the energy of the pressurized fluid into electrical energy, said energy generator (36) being capable of being connected to an electrical network to supply said electrical network with electrical energy, and a fluid circulation circuit (28) both connecting the pump (16) to the storage reservoir (32), in such a way as to inject the fluid into said reservoir when said pump is activated, and connecting the storage reservoir (32) to the energy generator (36). The circulation circuit (28) comprises at least one valve arranged between the storage reservoir (32) and the energy generator (36), said valve being moveable between an open position allowing supply of the electrical energy generator (36) with pressurized fluid and a closed position, prohibiting the supply of the electrical energy generator (36) with pressurized fluid.