Patent ID: 6202400
Filing Date: 2001-03-20
Classification: F01K,F02C,F05D,Y02E

Abstract:
A controller for controlling an exhaust gas recirculation rate from a gas turbine to a compressor and for controlling a fuel amount to be charged into a combustor in a thermal power plant, comprising:means for deriving an initial exhaust gas recirculation rate signal from a received load demand signal;means for comparing the load demand signal with a load signal to generate a fuel amount target signal;means for comparing the fuel amount target signal with a fuel flow rate signal and correcting in dependence on a determined combustion temperature determined on the basis of a temperature of the gas turbine exhaust gas and an outlet pressure of the compressor to determine the fuel amount to be charged into the combustor; andmeans for correcting the initial exhaust gas recirculation rate signal in dependence on the determined combustion temperature to derive a recirculation rate control signal.