FIELD: machine building.
SUBSTANCE: invention relates to the methods of control of active power and frequency of hydraulic unit (HU) of hydroelectric power station with Kaplan turbine. The active power and frequency is controlled by changing of value of opening of the guiding device (GD) and angular orientation of the turbine impeller vane at the expense of forming and feeding of control actions to servos of GD opening mechanisms and angular orientation of impeller vanes. Control action on the GD opening servo is formed with the help of adaptive algorithm, which is obtained by minimisation of functional of the generalised work (FGW) in view of limitations preset by model HU and factory characteristics. FGW is obtained as an integral of the sum of squares of four normalised terms: deviation of active power of the hydraulic unit from required power, deviation of frequency of generated current from required frequency, GD opening value and rate of change of GD opening value. Into HU model the main energy turbine equation and rotor dynamic equation are included. The model parameters are clarified by the least squares method. Control action on the vane rotation servo is determined from conditions of a HU maximum active power at any values of GD opening and operating head, the satisfaction of which is provided by change of vane rotation angle.
EFFECT: minimising of mean square errors of active power and frequency control, hydraulic losses and vibration, increase of the turbine efficiency and reliability of hydraulic unit operation.
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