METHOD FOR ADJUSTMENT OF ROTATION FREQUENCY OF ROTOR OF JET HYDRAULIC TURBINE, AND PID-CONTROLLER OF ROTATION FREQUENCY OF HEAVY IMPACT Russian patent published in 2022 - IPC F01D17/20 F03B15/06 

FIELD: control equipment.

SUBSTANCE: method for adjustment of a rotation frequency of a jet hydraulic turbine is proposed, based on an “amplifier-limiter-integrator” structure, on an input of which a signal is supplied, proportional to a linear combination of state variables taken with certain weights: deviation of the frequency from a setpoint, dynamic deviation of pressure caused by movement of a control body and the mentioned deviation of the rotation frequency of the rotor, as well as deviation of the control body from its expected position in a steady state. In a linear model of a control system, the linear combination of state variables is represented by a linear combination of a sensor: deviation of the rotation frequency from the setpoint, its derivative, and dynamic deviation of pressure emulated by phantom flexible feedback with water conduit parameters. PID-controller of heavy impact is proposed, using as PI-unit an “amplifier-limiter-integrator” chain embraced by flexible negative feedback, at an input of which a signal is supplied of deviation of a frequency with single amplification, summed with a signal of a frequency derivative. A scheme for setting of the controller is provided. It is shown that a frequency characteristic of the proposed controller, in small, coincides with a frequency characteristic of traditional structural solutions, while the controller has high performance in compensation of disturbances from a load, forming a quasi-optimal law of motion of the control body and switching to a sliding mode, when reaching the equilibrium point. A statism generator does not distort a frequency characteristic of the controller in a high frequency zone.

EFFECT: with correct setting, a contour of adjustment of a frequency has absolute resistance with unlimited increase in a gain coefficient of an amplifier-limiter.

2 cl, 20 dwg