GAS-TURBINE FUEL DELIVERY CONTROL METHOD Russian patent published in 2008 - IPC F02C9/28 

FIELD: gas industry, power engineering.

SUBSTANCE: invention relates to control of gas-turbine engines used as power units in gas industry and electrical engineering. According to proposed method, speed of gas generator rotor, speed of free turbine rotor, temperature of combustion products in engine gas-air duct and pressure after gas generator compressor are measured, and control action is formed on acting member-valve metering out fuel delivery into combustion chamber. Value of control action is determined by set of control and limiting circuit of negative feedback circuit with adaptive control law. Control circuit maintain preset value of gas generator rotor speed or free turbine rotor speed, and limiting circuits preclude emergency situations, holding parameters of engine within preset range, at each moment of time value of output of one of circuits is chosen as control action which is provided by minimum-maximum selector as a result of forming of control error in each circuit basing on current changes of physical values with subsequent calculation of output values of circuit, by calculating separately increment to common integrator from each circuit and further successively comparing output values of circuits with each other. Circuit whose output value is minimum is chosen for use as active one for control and maximum limiting circuits, and for lower limiting circuits, circuit is used whose output value is maximum, after which output value of chosen active circuit is added to value stored in common integrator, and calculated increment from active circuit is added to value of common integrator for subsequent calculations, and coordinated control action is formed. Proposed method makes it possible to increase efficiency of control of gas-turbine engine near limits of rotation speed working range, combustion products temperature and pressure after compressor and also service life, efficiency and safety of operation of gas-turbine engine. It improves stability of control system at disturbing actions as to load and changes in external conditions.

EFFECT: provision of effective control of gas-turbine engine.

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