Stabilization of hydraulic machines with S-zone characteristics
OwnerRenaud Guillaume, Theophane Foggia +1inventors
InventorsRenaud Guillaume, Theophane Foggia, Quentin Alloin
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Abstract
This method for stabilizing the rotation speed of a hydraulic machine having S-characteristic and comprising a distributor (9) is adapted to modify a water flow, so that the machine can be coupled to a grid. The method comprises the steps of calculating an orientation of the distributor (9); and orienting the distributor according to the calculated orientation. The method further comprises the steps of providing an electric torque to the machine so as to reach a target speed.
Claims17
A method for stabilizing the rotational speed of a hydraulic machine in turbine mode for coupling the hydraulic machine to a grid, the hydraulic machine comprising a distributor adapted to modify a water flow, wherein the method comprises the steps of:
- calculating a speed difference (ε) between the rotational speed (N) of the hydraulic machine and a target rotational speed (N_sp);
- using the speed difference (ε) as an input, calculating an orientation (γ) of the distributor by a control loop feedback system having a first control loop;
- orienting the distributor according to the calculated orientation (γ);
- using the speed difference (a) as an input to a second control loop having an electric torque controller, outputting an electric torque set-point (Telec_sp);
- applying an electric torque (Telec) to the hydraulic machine corresponding to the electric torque set-point (Telec_sp).
A system for converting hydraulic energy into electrical energy, the system comprising:
- a hydraulic machine comprising a distributor adapted to modify a water flow, and a rotor that is rotated by operation of the hydraulic energy;
- a first control loop comprising a controller, the first control loop configured to use a speed difference (ε) between a rotational speed (N) of the hydraulic machine and a target rotational speed (N_sp) as an input to calculate an orientation of the distributor and orientate the distributor according to the calculated orientation;
- and
- a second control loop comprising an electric torque controller that uses the speed difference (ε) as an input, the second control loop configured to output an electric torque set-point (Telec_sp) and provide an electric torque (Telec) to the rotor corresponding to the electric torque set-point (Telec_sp) so as to reach a target rotational speed (N_sp) of the hydraulic machine.
Dependencies are inferred from the claim text.