Installation for converting hydraulic energy into electrical energy, provided with a fixed speed hydraulic machine comprising a pump-turbine (2) linked to a generator (20) by a shaft.

The installation further comprises: an electrical torque actuator (34) to establish a circuit with the generator (20), electrical torque actuator connection means (35) for connecting the generator (20) the electrical torque actuator, and command means (29) for detecting a disconnection of the generator (20) from the grid, and for commanding the electrical torque actuator connection means (35) to connect the generator (20) to the electrical torque actuator (34).

Installation for converting hydraulic energy into electrical energy, provided with a fixed speed hydraulic machine comprising a pump-turbine (2) linked to a generator (20) by a shaft.

The installation further comprises: an electrical torque actuator (34) to establish a circuit with the generator (20), electrical torque actuator connection means (35) for connecting the generator (20) the electrical torque actuator, and command means (29) for detecting a disconnection of the generator (20) from the grid, and for commanding the electrical torque actuator connection means (35) to connect the generator (20) to the electrical torque actuator (34).

The device, comes to solve the problem of the Spanish rivers by the absence of migratory fish in dams, salmon, sea trout, shadles, sabogas, lampreys, eels, etc. The ascent of the fish is achieved by the mechanical actuation of an endless screw or Archimedes, located in an adapted channel, which, turning on its axis clockwise, allows water to be raised from the rivers including the existing fish in the bank. The descent of the fish is achieved by the passage of water with the fish through the screw. The passage induces an anti-clockwise rotation in the screw that is used to generate electricity. The sale of electricity allows investments to be financed for the environmental effect essential for compliance with current legislation and the provisions of the 2015-2021 Hydrological Plans, at no cost to the concessionaire of the exploitation nor the Spanish state.

Various implementations include a rim-drive turbomachine including a hollow cylindrical shell, at least one motor rotor, at least one motor stator, and two or more sets of blades. The shell includes two or more shell portions axially separate from, and couplable to, each of the other shell portions. Each motor rotor is coupled to the inner surface of a shell portion, extends circumferentially around the central axis, and is rotatable about the central axis. Each motor stator is in electromagnetic communication with one motor rotor. Each shell portion has at least one set of blades coupled to the inner surface of that shell portion. The blades of each set of blades extend radially inwardly toward the central axis and are spaced circumferentially around the central axis. The sets of blades are axially spaced apart along the central axis. A single set of blades is coupled to a motor rotor.

Various implementations include a rim-drive turbomachine including a hollow cylindrical shell, at least one motor rotor, at least one motor stator, and two or more sets of blades. The shell includes two or more shell portions axially separate from, and couplable to, each of the other shell portions. Each motor rotor is coupled to the inner surface of a shell portion, extends circumferentially around the central axis, and is rotatable about the central axis. Each motor stator is in electromagnetic communication with one motor rotor. Each shell portion has at least one set of blades coupled to the inner surface of that shell portion. The blades of each set of blades extend radially inwardly toward the central axis and are spaced circumferentially around the central axis. The sets of blades are axially spaced apart along the central axis. A single set of blades is coupled to a motor rotor.

The inventive technology, in particular embodiments thereof, may be described as an apparatus (e.g., a pump) that imparts work to and redirects a fluid, and that features an impeller configured to contact and redirect an impeller inflow along a toroidal flowpath to generate an impeller discharge that has both axial and tangential velocity components, where the axial velocity component is substantially 180 degrees relative to a direction of an impeller inflow, in a meridional plane, the apparatus also featuring a diffuser having a diffuser axis that is aligned with an impeller axis of rotation, the diffuser featuring a diffuser outlet annular radial size that is greater than a diffuser inlet annular radial size; and/or curved diffuser vanes established as part of the diffuser, that redirect the impeller discharge so as to reduce the tangential velocity components.

A variable speed pumping system includes a generator motor including a frequency converter, in which the variable speed pumping system, in the pumping mode, supply a power command to the generator motor to perform power control, and the power control correction signal generator adds a value obtained by multiplying a signal based on a difference between the power input command and an actual power input measured by a power detector in the pumping mode by a constant gain to a signal based on the deviation and inputs the added value to an integration control element to generate the power control correction signal based on an output signal of the integration control element.

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.

A combined pump and turbine (electromechanical converter), which may be operable as a motorized centrifugal pump for starting a siphon and as an electromechanical turbine particularly for transmission of a liquid, such as water, in a water treatment plant.

The method allows stabilizing the rotation speed of a hydraulic machine with S-characteristics. It is implemented by means of a control loop feedback system having a controller for calculating an orientation to affect guide vanes of the machine. It includes steps of calculating a set of internal states associated with the operating point of the machine, establishing a linearized transfer function in function of the set of internal states, calculating characteristics parameters of the controller in function of the established transfer function so that the control loop feedback system is stable, measuring the rotation speed of the hydraulic machine, comparing the measured rotation speed with a target rotation speed, and adjusting the orientation affected to the guide vanes so as to reduce the speed difference between the calculated rotation speed and the target rotation speed.