METHOD AND DEVICE FOR TURBINE CONTROL BASED ON DEPENDENCE OF EXHAUST GAS TEMPERATURE ON TURBINE PRESSURE COEFFICIENT

摘要

1. A method of controlling the operating point of a gas turbine containing a compressor, a combustion chamber and at least a turbine, comprising: determining a turbine exhaust gas pressure at a turbine outlet; measuring a compressor outlet pressure; determining a turbine pressure coefficient based on a turbine exhaust gas pressure and a compressor output; calculating the temperature of the exhaust gas at the output of the turbine as a function of the pressure coefficient of the turbine; determining the reference curve of the temperature of the exhaust gas in a plane defined by eraturoy exhaust gas turbine pressure ratio, the reference exhaust gas temperature curve contains points that are optimal for the gas turbine, and controlling a gas turbine to keep the operating point on the reference exhaust temperature curve gaza.2. The method according to claim 1, further comprising adjusting the angle of the inlet guide apparatus located at the inlet of the compressor to maintain the operating point on the reference curve of the exhaust gas temperature. The method according to claim 1 or 2, further comprising using a reference temperature curve of the exhaust gas to control the combustion temperature of the combustion chamber, wherein the combustion temperature is the temperature of the combustion products after the nozzle of the first stage of the turbine. The method according to claim 1 or 2, in which the determination of the exhaust gas pressure of the turbine includes calculating the pressure drop of the exhaust gas due to the flow of mass in the turbine duct; calculating the pressure recovery due to the formation of traction due to the height difference between the turbine outlet and the duct outlet into the atmosphere, is