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Technical Overview Through Development of the Largest Scale Turbine-Generator Model with Full Water Cooling

Although turbine-generators have recently achieved larger rated output, higher efficiency, and high reliability, it is necessary to continue research and development for further refinement. TOSHIBA has developed a multipurpose full scale generator model simulating a 2000 MVA generator which is predicted as the manufacturable maximum limit for a 3600 r/min machine. This model has the same dimensions as a 2000 MVA generator, but its core length is shortened to one third of the full-length generator. All tests scheduled have been completed successfully. This is a fully water-cooled generator with the maximum diameter rotor for a 3600 r/min machine and has ratings of 30 kV class terminal voltage and 40 kA class armature current. This paper describes the outline of the model and its test results and also shows trends of generator design including the manufacturable limit and its limiting factors.