Starting control method and device of combustion gas turbine

Abstract

The invention discloses a starting control method and device of a combustion gas turbine. A combustion regulating valve is controlled by adopting matching of three elements for providing fuel to the combustion gas turbine: a real-time rotating speed measurement value is matched with a rotating speed-openness curve to obtain a first combustion regulating valve openness; the real-time rotating speed measurement value is matched with a rotating speed-rotating speed climbing rate curve to obtain a corresponding rotating speed climbing rate, so that a current rotating speed PID (Proportion Integration Differentiation) given value is figured out, a second combustion regulating valve openness is obtained through the calculation of PID; the real-time rotating speed measurement value is matched with a rotating speed-temperature climbing rate curve to obtain a corresponding temperature climbing rate, so that a current temperature PID given value is figured out, and a third combustion regulating valve openness is obtained through calculation of PID; and the minimum value of the three combustion regulating valve opennesses is used as a final combustion regulating valve openness. According to the invention, the combustion regulating valve openness can be immediately corrected according to the change conditions of the rotating speed and the temperature, and thus the starting success rate can be increased.

Description

technical field [0001] The invention relates to the field of gas turbines, in particular to a method and device for starting and controlling a gas turbine. Background technique [0002] The start of the existing gas turbine usually uses a starter to drive the gas turbine to start. At the same time, the gas turbine control device controls the fuel regulating valve to provide the gas turbine with suitable fuel for combustion to generate power. As the speed of the gas turbine continues to rise, when it reaches a certain speed, start The gas turbine quits working, and the gas turbine is completely driven by the power generated by burning fuel to run to the idle speed or the working speed, so far, the entire starting process is completed. During the entire start-up process, providing suitable fuel is the key to ensure normal start-up, and at the same time, it is also necessary to ensure that the exhaust gas temperature of the gas turbine cannot exceed the temperature during the e...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a gas turbine startup control method and device capable of correcting the opening of the fuel control valve in time according to changes in the rotational speed and temperature and improving the success rate of startup, so as to solve the problem of external conditions in the existing gas turbine startup control method. The technical problem that the starting success rate decreases when the change is large

Images