CONTROL DEVICE FOR GAS TURBINE

摘要

PURPOSE:To obtain a transient characteristic in a low revolution area equivalent to that in a high revolution area by adding a correction signal with a correction characteristic corresponding to the number of revolutions of a gas generator turbine to a variable vane opening adjustment signal. CONSTITUTION:A correction signal generator 51 receives the input of a gas generator revolution number measured value signal NG, and send out a correction signal DELTAVGO to a signal converter 52. The correction signal DELTAVGO is characterized to be increased in its correction amount when the gas generator revolution number measured value signal NG is in a low revolution area, and reduced as the NG comes into a high revolution area. The signal converter 52 provides the correction signal DELTAVGO with the polarity of a thermal deviation (T7*-T7C) outputted from a comparator 23, and send it out to an adder 53 as a correction signal DELTAVGC of a variable vane opening adjustment signal VGT. The adder 53 adds the output VGT of an adjuster 24 to the correction signal DELTAVGC, and send out the result to a variable vane opening adjustment signal computation circuit 30 as a variable vane opening adjustment signal VGTC.