PUMP STORAGE POWER PLANT, METHOD FOR OPERATING A PUMP STORAGE POWER PLANT, AND PUMP STORAGE SYSTEM

摘要

The invention relates to a pump storage power plant with a working cylinder which is partly immersed into a working fluid reservoir, such as a water reservoir, comprising an upper fluid compartment substantially above the fluid level of the working fluid reservoir and a lower fluid compartment substantially below the fluid level; a lifting piston which is guided in a movable manner in the gravitational direction relative to the working cylinder and seals the upper fluid compartment from the lower fluid compartment such that a fluid exchange between the upper fluid compartment and the lower fluid compartment under the influence of gravity is prevented; an energy charging operation, in which working fluid is allowed into the upper fluid compartment such that the lifting piston is immersed into the lower fluid compartment with respect to the fluid level under the influence of the gravitational force and/or the hydrodynamic pressure of the upper fluid allowed into the upper fluid compartment; and an energy release operation, in which upper fluid is pushed out of the upper fluid compartment under the influence of the lifting force of the lifting piston and/or in which a fluid column of the upper fluid that is built up during the energy charging operation flows out of the upper fluid compartment in a preferably constant manner.