Współczesne trendy doskonalenia konstrukcji turbogeneratorów

The paper presents possibilities of reducing costs of electricity generation as a result of modernizations in‐ creasing the rated powers of turbogenerators. The programs for calculations of the temperature field in large ac machines have aided the works connected with modernization of turbo‐ generators. Turbogenerators of increased rated powers work in many power plants in Poland and abroad, among others in Bulgaria, Finland, Greece, Slovenia, Korea and China. An ex‐ ample of the TWW‐200‐2(2A) turbogenerator modernization is presented. The improved fans of increased discharge enabled the increase in the turbogenerator rated power by 20%, while at the same time keeping the rated load power coefficient.