CONTROLLER FOR USE WITH GAS TURBINE ENGINE

摘要

Disclosed is a gas turbine control device which can maintain stable combustion and good exhaust gas characteristics even if the catalyst is degraded. The disclosed gas turbine control device (6) is provided with a combustion device (2) which premixes compressed air (CA) from a compressor (1) with main fuel (MF), and burns the mixed gas with a catalyst to supply a turbine (3). The combustion device (2) has a catalyst combustion unit (21) for carrying a catalyst, and a preburner (7) for supplying preheating fuel (PF) to compressed air (CA) on the upstream side of the preburner (7) and burning the mixed gas. The gas turbine control device (6) is further equipped with: a storage means (6c) which stores the difference between the inlet temperature and the outlet temperature of a new catalyst combustion unit (21) as an initial value (D); and a preburner fuel control means (6a) which controls the fuel supply rate to the preburner on the basis of the interannual difference (?d) between the initial value (D) and a current value (d) which is the difference between the inlet temperature (t1) and the outlet temperature (t2) of the catalyst combustion unit (21) when running.