Mitsubishi Heavy Industries Technical Review
    Vol. 52 No. 2 (2015)   Mitsubishi Hitachi Power Systems
    Technical Papers

    Development of Large Capacity Turbine Generators for Thermal Power Plants

    Yasunori Satake,
    Kazuhiko Takahashi,
    Takami Waki,
    Mitsuru Onoda,
    Takayasu Tanaka

    With the background of electric power demand growth and effective resource utilization, demand for larger-capacity turbine generators has been increasing. Mitsubishi Hitachi Power Systems, Ltd. (MHPS) has developed a 1300 MVA-class turbine generator with a direct water cooled stator system that has 1.2 times as much capacity as the preceding generator. The developed turbine generator adopts various technologies that increase capacity, and has left the factory after gaining favorable results in factory tests for the evaluation of the performance and reliability of the applied technologies. As a result of enhanced cooling performance through the development of a high heat transmission insulation system, the basic design of a large-capacity generator with indirect hydrogen cooling instead of the conventional direct stator water cooling has been completed, and it is estimated that the capacity of the designed generator can be increased to 900 MVA class for both 50 Hz an 60 Hz.