OPERATION CONTROL METHOD FOR GAS TURBINE AND OPERATION CONTROLLER FOR GAS TURBINE

摘要

An operation control method for a gas turbine comprising making a molten salt map in a liquid phase state by calculating the dew point and the solidus temperature of molten salt, which causes high-temperature corrosion on the high temperature component of a turbine by impurities, using a thermodynamic equilibrium calculation based on the impurities contained in a low-quality fuel and the operation data of the gas turbine, indicating the surface temperature and pressure of the high temperature component of the turbine on the molten salt map to determine the superposition state of the map on the region of molten salt in a liquid phase, predicting the lifetime of the high temperature component of the turbine by estimating the corrosion rate thereof, and controlling the flow rate of low-quality fuel being supplied to a combustor based on the prediction of the lifetime so that the areas of the surface temperature and pressure regions of the high temperature component superposing on the region of molten salt in a liquid phase on the molten salt map is minimized.