| 摘要 |
PURPOSE:To secure such a signal as indicating an accurate turbine output of power, by setting a turbine output signal multiplying low-pressure inlet pressure by a proportional constant down to the turbine output with a closed signal of an intercept valve at a time when a turbine output variation is sudden, insomuch that the intercept valve is closed. CONSTITUTION:In time of normal operation, an intercept valve is in a state of opening whereby an intercept valve closing signal 1 is logic 0, making a select switch 23 come into contact with the A side, thus a turbine output signal 12 is secured as in the past in multiplying high pressure turbine first step pressure 4 by a proportional constant K with a counter 11. When turbine output is suddenly changed and the intercept valve is closed, however, the valve closing signal 21 comes to logic 1, making the switch 23 come into contact with the B side, thus the turbine output signal being estimated out of low-pressure turbine inlet pressure 31 is secured. However, since the low-pressure turbine inlet pressure is of a more downstream one than that of the intercept valve, even if the intercept valve is closed, the low-pressure turbine output is proportionate to the inlet pressure at all times, that is to say, it is because the whole turbine output and the low-pressure output are almost nearly proportioned with each other. |
