| 摘要 |
PURPOSE: A method is provided to prevent damage of blades of the turbine generator when the turbine generator operates in an abnormal region. CONSTITUTION: A method comprises the first step(21) of setting a reference level for discrimination between an abnormal region and a normal region; the second step(22) of detecting a back pressure and an intake fluid flow; the third step(23) of calculating a reference fluid flow with respect to the detected back pressure; the fourth step(24) of comparing the reference fluid flow and the intake fluid flow; the fifth step(25) of calculating the reference back pressure with respect to the intake fluid flow when the measured intake fluid flow exceeds the reference fluid flow; the sixth step(26) of setting values of a rear end back pressure control loop to be higher than the reference back pressure; and the seventh step(27) of repeatedly performing second to sixth steps if it is judged as a continuation of operation.
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