FIELD: hydroelectric power engineering. SUBSTANCE: hydroelectric power plant has floating member in the form of catamaran 1 with two hulls 2 joined to deck 3 mounting on its underside flow passage 5 with hydraulic turbine placed between inlet mouth 7 and outlet piping 8. Catamaran 1 is held in position in water stream by means of cable-and-anchor system 10 and terminal section 12 of outlet piping 8 has increased sectional area in flow direction which is petal-shaped, or terminal section is divided into two or more pipes. Power plant is installed in river stream, its section being contracted by water-retaining structure to form high-speed water-flow passage at locating point of catamaran 1 carrying hydraulic turbine. EFFECT: facilitated construction of hydroelectric power plant. 4 cl, 9 dwg
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