High power control method of variable geometry three-shaft gas turbine

Abstract

The invention discloses a variable geometry triaxial gas turbine high power controlling method. The variable geometry triaxial gas turbine high power controlling method includes the steps that mutualrelationship among the vane guiding angle VGV of a power turbine and the high-pressure shaft relative speed NH, the low-pressure shaft relative speed NL and the gas generator outlet total temperatureT6 of the gas turbine is determined through a bench experiment; whether the gas turbine enters into a high-power mode or not is judged; according to an established high-power control method, executionis started after entering into the high-power mode is judged; and the high-power controlling method is carried out in an analogue simulation mode, and the effectiveness of the high-power control method is verified. According to the variable geometry triaxial gas turbine high power controlling method, the fact that the gas turbine cannot continue to increase working conditions due to the fact thata certain parameter reaches the maximum limit value is effectively avoided, and thus the maximum output power of the gas turbine is effectively increased.

Description

technical field [0001] The present disclosure relates to the field of gas turbines, in particular to a high-power control method of a variable-geometry three-shaft gas turbine. Background technique [0002] The variable geometry gas turbine has good maneuverability and variable working conditions. How to optimize the control law and adjust the geometry of the flow channel to keep its performance optimal under different working conditions is of great significance. [0003] The maximum output power of a three-shaft gas turbine is often limited by the relative speed NH of the high-pressure shaft, the relative speed NL of the low-pressure shaft, and the outlet temperature T4 of the combustion chamber. When the gas turbine works in a standard atmospheric environment, according to the design objectives NH, NL, and T4 can often reach the maximum limit value at the same time, and the output power of the gas turbine is the maximum at this time. However, when the atmospheric environm...

AI Technical Summary

Problems solved by technology

However, when the atmospheric environment changes or the performance of engine components deteriorates, the matching relationship between the compressor and turbine components will change, which may cause the gas turbine to fail due to one of the three parameters NH, NL, and T4 first reaching the maximum allowable value. Cannot continue to increase output power

Images