| 摘要 |
PROBLEM TO BE SOLVED: To effectively resolve resonance problems in a twin-shaft gas turbine, associated with changes in a rotation speed of a gas generator shaft. SOLUTION: The twin-shaft gas turbine 1, which has a gas generator 2 including a compressor 7, a combustor 8 and a high-pressure turbine 9, is configured to make a first control mode and a second control mode selectively usable concerning control of the gas generator. In addition, in the first control mode, an IGV opening in the compressor is adjusted based on a corrected rotation speed of the gas generator shaft, and in the second control mode, the IGV opening is adjusted to maintain a constant rotation speed of the gas generator shaft. Further, the first control mode is used in starting, in stopping and during low load operation wherein a load is of a specific or lower magnitude, and the second control mode is used under operational states other than those to which the first control mode is used. COPYRIGHT: (C)2010,JPO&INPIT
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