FIELD: gas turbine plants. SUBSTANCE: combined gas turbine plant includes main duct in form of two-chamber or one-chamber drive with free turbine, additional duct with combustion chamber, power turbine of electric generator drive and gas-and-air heat exchanger, as well as drive air compressor. Delivery line of drive compressor is connected to combustion chamber of additional duct through recuperative gas-and-air heat exchanger using heat of waste gases of electric generator drive turbine. Exhaust gas line of free and power turbine of main and additional ducts may be combined in common line which is connected to steam-and-water recuperator or to steam turbine power attachment. EFFECT: enhanced efficiency and increased power of plant. 2 cl, 1 dwg
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