Major tendencies in the development of generating equipment manufactured by JSC Electrosila for nuclear, thermal and hydroelectric power stations

The major tendencies of the improvement of turbogenerators and hydrogenerators manufactured for power stations of different type are considered. JSC Electrosila has developed and produces turbogenerators of series TBB with hydrogen-to-water cooling at the power from 160 to 1200 MW About 600 turbogenerators of this series have been manufactured at the enterprise that makes up over 80% of the installed capacity at the thermal and nuclear power plants in Russia and also they are supplied for export. The T3B series of turbogenerators rated for 63 to 800 MW with full water cooling use only noncombustible materials. The major feature of the design of this type of generator is a self-pressure cooling system of the rotor which allows the water pressure in the rotor to be reduced and thereby to increase the generator reliability. Improvement of TBB and T3B series turbogenerators is performed due to the utilization of new structural and insulating materials, up-to-date technologies and creation of more effective excitation systems. JSC Electrosila has experience in production and modernization of hydrogenerators over the range from 4 to 700 MW at a rotation speed from 50 to 750 rpm. Use is made of high-alloy cold-rolled anisotropic steel and also insulating materials of thermal class F. Semi-conductive varnish coating of the stator winding bars is applied. Light-weighted welded constructions of the stator frames and brackets are implemented