Patent ID: 8196414
Filing Date: 2012-06-12
Classification: F02C,F05D

Abstract:
1. A twin-shaft gas turbine with a gas generator, the gas turbine comprising: a compressor for generating compressed air; a combustor for generating combustion gases by burning a fuel mixedly with the compressed air supplied from the compressor; and a high-pressure turbine rotationally driven by the combustion gases supplied from the combustor, the high-pressure turbine being used to generate a driving force of the compressor; wherein a first control mode and a second control mode are selectively usable for control of the gas generator, in the first control mode, an IGV angle in the compressor is controlled in accordance with a corrected shaft rotation speed of the gas generator, in the second control mode, the IGV angle is controlled to maintain a constant rotation speed of the gas generator shaft, the first control mode is used to start, to stop, and to operate the turbine under fixed or lower load conditions, and the second control mode is used under operational states other than those to which the first control mode is applied.