SYSTEM FOR AUTOMATIC CONTROL OF POWER OF HYDRAULIC UNIT OF HYDROELECTRIC POWER PLANT Russian patent published in 2024 - IPC F03B15/16 

FIELD: hydropower engineering.

SUBSTANCE: invention relates to hydropower engineering, to systems for automatic control of power of a hydraulic unit of a hydroelectric power plant by controlling water flow through a hydraulic turbine, which operates in a wide range of controlled loads of the hydraulic unit. System comprises a hydraulic turbine with a guide vanes, which is connected to a servo motor by means of an electrohydraulic booster and a guide vanes position controller, hydraulic turbine rotor speed sensors and guide vanes position sensor connected to position controller by negative feedback, guide vanes position value generating unit; series-connected upstream water level sensor, high-frequency oscillation filter, nonlinear element, connected to the first input of the manual control unit, to the second input of which the manual head setting device is connected; a frequency sensor in the electric power network and a frequency value setter in the electric power network, connected to a frequency deviation signal generator connected through a nonlinear element to a frequency converter; hydrogenerator power sensor, connected to the first negative input of the power controller, to the second positive input of which the setting generator is connected, connected to the setter of the planned power and to the unscheduled power setter, output of power regulator is connected via manual switching unit to limitation generator connected with subsystem of load variation range limitation and with subsystem of load variation rate limitation. System additionally contains a regulator of kinetic energy of rotation of impeller of hydraulic turbine, setter of kinetic energy of rotation of impeller, multiplication unit, two differentiation units, high-frequency noise filters, a device for compensating for external controlled disturbance by water level and a device for compensating for external controlled disturbance by frequency change in the network.

EFFECT: invention is aimed at improvement of accuracy of control and efficiency of participation of hydraulic unit in mode of maintenance of general system parameters.

2 cl, 2 dwg