PUMPED-STORAGE POWER PLANT

摘要

The invention relates to an underwater pumped-storage power plant for the temporary, reversible intermediate storage of electric energy from other power plants, in particular wind turbines and/or photovoltaic systems. The pumped-storage power plant comprises a pressure storing system with at least two pressure containers which can be filled with water and which form a common pressure storage volume; a water outlet for discharging water from the pressure storing system directly into the surrounding sea against the hydrostatic water pressure (PT) corresponding to the water depth (T); a pump which is arranged at the water outlet for pumping water out of the pressure storing system into the surroundings sea, said pump converting electric energy into corresponding potential energy of the displaced water column while the water is being pumped out against the hydrostatic water pressure (PT) of the surroundings sea; a water inlet for introducing water directly from the surrounding sea into the pressure storing system with the hydrostatic water pressure (PT) corresponding to the water depth; a common generator arranged at the water inlet, said common generator converting the potential energy of the previously displaced water column back into electric energy while the water is being introduced with the hydrostatic water pressure (PT) at the water depth (T); and electric lines for transmitting the electric energy from the water surface to the underwater pumped-storage power plant and back. The pressure containers are pressure-resistant such that said pressure containers can be pumped empty by means of the pump in a dimensionally-stable manner against the hydrostatic water pressure (PT) at the sea bed.