FUEL CONTROL METHOD FOR GAS TURBINE, CONTROL DEVICE FOR EXECUTING SAID METHOD, AND GAS TURBINE INSTALLATION PROVIDED WITH SAID CONTROL DEVICE

摘要

A control device includes a fuel equivalent value calculation unit for determining the flow rate of fuel supplied to a gas turbine in accordance with a target value deviation between an actual rotation speed and a target rotation speed, an upper limit deviation calculation unit for obtaining an upper limit deviation which is a deviation between a set upper limit output and an actual output, a lower limit deviation calculation unit for obtaining a lower limit deviation which is a deviation between a set lower limit output and the actual output, and a parameter-changing unit for changing any one parameter among the target rotation speed, the actual rotation speed, and the target value deviation so that the target value deviation decreases when the actual rotation speed decreases and the upper limit deviation is small, and so that the target value deviation increases when the actual rotation speed increases and the lower limit deviation is small.

主权项

1. A control device for a gas turbine comprising:
a target value output unit outputting a target value equivalent to a target rotation speed of the gas turbine; a target value deviation calculation unit obtaining a target value deviation, the target value deviation being a deviation of the target value with respect to an actual rotation speed equivalent value equivalent to an actual rotation speed of the gas turbine; a fuel equivalent value calculation unit determining a fuel equivalent value equivalent to a flow rate of fuel supplied to the gas turbine in accordance with the target value deviation; a rotation speed variation detecting unit detecting a variation of the actual rotation speed of the gas turbine; an upper limit deviation calculation unit obtaining an upper limit deviation, the upper limit deviation being a deviation of a set upper limit output of the gas turbine with respect to an actual output of the gas turbine; a lower limit deviation calculation unit obtaining a lower limit deviation, the lower limit deviation being a deviation of the actual output of the gas turbine with respect to a set lower limit output of the gas turbine; and a parameter-changing unit changing any one parameter among the target value, the actual rotation speed equivalent value, and the target value deviation such that the target value deviation decreases in a case where the actual rotation speed equivalent value decreases and a previously determined value exceeds the upper limit deviation and that the target value deviation increases in a case where the actual rotation speed equivalent value increases and a previously determined value exceeds the lower limit deviation.