A test-bed for a pump as turbine transition process based on digital twinning is provided, including a PAT physical model used for controlling the pump as turbine transition process and collecting data of the pump as turbine transition process; a PAT twinning data system used for processing the data of the pump as turbine transition process to obtain a measurement database; a PAT twinning virtual system used for carrying out numerical simulation on the pump as turbine transition process based on the measurement database to obtain a value obtained by numerical simulation of a PAT virtual system; and a PAT service system used for processing the value obtained by the numerical simulation of the PAT virtual system, obtaining an optimal operation strategy and feeding the strategy back to the PAT physical model, and updating the measurement database at the same time.

A water transportation pipe power generation device with flow-regulating and pressure-regulating function is provided comprising a tubular power generator housing, a stator component fixedly inside and a tubular rotor component coaxially disposed inside the stator component. The stator component comprises fixed coil windings uniformly distributed on an outer circumferential surface of the rotor component and an adjustable coil winding capable of performing axial movement along the rotor component and adjusting an axial position to change a magnetic flux. The rotor component comprises a tubular rotor housing for a water flow to run through. Multiple spirally-distributed rotor blades are disposed on an inner circumferential surface of the rotor housing, and permanent magnet groups in sensing cooperation with the fixed coil windings and the adjustable coil winding are disposed on an outer circumferential surface of the rotor housing. The rotor component can coaxially rotate for power generation relative to the stator component.

A hydro turbine of a hydroelectric power plant operates with reduced cavitation. At least one motion sensor coupled to a rotor of the hydro turbine measures motion of the rotor during operation of the hydro turbine and generates measurement data. The measurement data and one or more operational parameters of the hydro turbine employed during the measuring are acquired. The operational parameter(s) is/are indicative of power supply of the hydro turbine. Based on the measurement data and the operational parameters, at least one metric indicative of an effect of the cavitation on the hydro turbine is computed. The at least one metric is compared with at least one threshold. Based on the comparison, a determination is made that the effect of the cavitation is too high. Based on the determining, information indicating unsuitability of the one or more operational parameters is output.

A test-bed for a pump as turbine transition process based on digital twinning is provided, including a PAT physical model used for controlling the pump as turbine transition process and collecting data of the pump as turbine transition process; a PAT twinning data system used for processing the data of the pump as turbine transition process to obtain a measurement database; a PAT twinning virtual system used for carrying out numerical simulation on the pump as turbine transition process based on the measurement database to obtain a value obtained by numerical simulation of a PAT virtual system; and a PAT service system used for processing the value obtained by the numerical simulation of the PAT virtual system, obtaining an optimal operation strategy and feeding the strategy back to the PAT physical model, and updating the measurement database at the same time.

The present disclosure discloses a method and an apparatus for identifying an S-characteristic of a pump turbine and a control method. The method for identifying an S-characteristic of a pump turbine includes: collecting a set of state parameters of the pump turbine at a preset time interval, wherein the state parameters comprise a flow rate and a rotation speed of the pump turbine; calculating a slope of a relationship curve between the rotation speed and the flow rate of the pump turbine within a current preset time interval; and determining, according to the positivity or negativity and an absolute value of the slope, whether the pump turbine enters an S-characteristic region.

An underwater flow turbine includes a gondola having an interior, a generator in the gondola interior, a rotatable hub connected to the gondola and configured to support a plurality of rotor blades, the rotatable hub being operatively connected to the generator, and an air handling device, such as a fan or an air filtration system, in the gondola and/or in the hub.