A run-of-river power plant is shown for the extraction of useful energy from a watercourse that has been developed for use in hydropower, whereby a watercourse is dammed; a chamber system consisting of any number of chambers of the same size is arranged one behind the other in a row; the chambers are divided into ballast water parts (A) and pressurized water parts (B); the floating bodies can be alternately lowered or raised vertically in a rhythm; the floats move upwards; the inflow of water only reaches the underwater channel through the chamber system after its energy has been used in the ballast water parts or the pressurized water parts by lowering or raising the floats; and the floating bodies are connected to generators via connecting rods, which generate direct current when the floating bodies are raised and lowered, which is converted into consumption-based alternating current in the downstream inverters and fed to the power grid.
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