| 摘要 |
PURPOSE:To improve the performance of a gas turbine at the time of a steady operation and prevent surging at the time of sudden acceleration by providing a means which compares the amount of change in the indicated value of a fuel flow rate with the maximum amount of change in a fuel flow rate and which outputs the smaller one of the two. CONSTITUTION:In a two-shaft gas turbine having a heat exchanger 5 and a variable nozzle 10, a calculator 30 calculates the amount of change in the indicated value of a fuel flow rate which is calculated by a controller 18. And, a detector 31 detects the angle of the variable nozzle 10, while detectors 32, 33 detect the inlet pressure and inlet temp. of a compressor 1. On the other hand, a device 34 operates the leak-rate while a device 35 operates the maximum amount of change in a fuel flow rate, of the heat exchanger 5. Further, a device 36 compares the amount of change in the indicated value of a fuel flow rate with the maximum amount of change in a fuel flow rate and outputs the smaller one of the two. And, a driving device 8 is operated via a converter 21 based on the output of the device 36, to control a fuel regulating valve 7.
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