19results about "Input signal generation" patented technology

Wind turbine comprising a tower (2) supporting a nacelle (5) and a rotor (3) having a plurality of rotor blades (4) and an active noise reduction device (7), wherein the active noise reduction device (7) comprises at least one actuator (8), at least one unsteady pressure sensor (9) adapted to generate an output signal corresponding to a turbulent flow condition during operation of the rotor blades (4), at least one noise sensor (10) adapted to generate an output signal corresponding to a noise generated by the rotor blades (4) at the position of the noise sensor (10), wherein the unsteady pressure sensor (9) and the actuator (8) are arranged on at least one of the rotor blades (4) and the noise sensor (10) is arranged at the nacelle (5) and / or at the tower (2), wherein the control unit (11) is adapted to control the actuator (8) depending on the output signals of the unsteady pressure sensor (9) and the noise sensor (10) to emit an anti-noise signal at least partially reducing the noise generated by the rotor blades (4).

A wind power generation device control system (100a, 100b) includes: a blade wind detecting device (400, 400a, 400b, 400c) for detecting at least one of a wind direction or a wind speed on at least one blade (230a, 230b, 230c) of a wind power generation device (200); and a blade control device (300a, 300b, 300c) for controlling at least one of (i) a pitch angle of the at least one blade (230a, 230b, 230c) or (ii) a yaw angle of the wind power generation device (200), based on at least one of the wind direction or the wind speed detected by the blade wind detecting device (400, 400a, 400b, 400c).

A method for detecting at least one characteristic of a component (13, 27, 36) of a wind turbine blade (3) or at least one characteristic of said component for said wind turbine blade, the method comprising: inducing (S1) an electric current (24) in a microwire (15) integrated in said component (13, 27, 36) by applying a primary magnetic field (25), measuring (S2) a secondary magnetic field (26) generated by the current (24) induced in the microwire (15), and determining (S3) the at least one characteristic of the component (13, 27, 36) based on the measured secondary magnetic field (26). The method provides efficient non-contact structural health monitoring.

The technology disclosed relates to a wind turbine and a measurement system comprising at least three measurement units, each arranged in substantially the same horizontal plane of a wind turbine tower and configured to measure their respective movements, and at least one tilt sensor or vertically oriented geophone arranged in substantially the same horizontal plane as the at least three measurement units and configured to determine the current tilt or inclination of a horizontal plane section determined by the mounting positions of the at least three measurement units. In particular, the measurement system comprising the at least three measurement units and the at least one tilt sensor or vertically oriented geophone is configured to continuously determine the current position and inclination of a horizontal plane section essentially determined by the mounting positions of the at least three measurement units based on the movement measurement data obtained by the at least three measurement units and the inclination of the horizontal plane section obtained by the at least one tilt sensor or vertically oriented geophone.

The method is for operating a wind turbine having a rotor with at least one rotor blade and a setting system which is configured to change the operation of the wind turbine. The method includes a step in which first trigger information is provided, wherein the first trigger information is representative of whether the torsional movement of at least one rotor blade exceeds a threshold. If this is the case, a first output signal is generated which is configured to cause the setting system to change the operation of the wind turbine to reduce the torsional movement of the at least one rotor blade.

Disclosed is a method of detecting abnormal conditions, e.g. of a blade or a rotor, on a wind turbine generator. Also disclosed is a system for detecting abnormal conditions, e.g. of a blade or rotor on a wind turbine generator.

The present invention relates to a wave energy to electrical energy converter, the wave energy converter comprising a hull (1), a movable mass (3), a guide (4) for displacement of the mass (3) and an electric power generator (10); the electric power generator (10) comprising a rotor, the mass (3) being coupled to the rotor by means of a mechanism configured to convert displacement of the mass (3) into rotation of the rotor; the mass (3), the guide (4), the generator (10) and the mechanism being in the hull (1); the guide having a port to starboard direction; the converter comprising a controller configured to adjust a rotor torque on the basis of the instantaneous position of the mass (3), instantaneous velocity of the mass (3) and the rolling of the hull (1).

A wind power generation device control system (100a, 100b) includes: a blade wind detecting device (400, 400a, 400b, 400c) for detecting at least one of a wind direction or a wind speed on at least one blade (230a, 230b, 230c) of a wind power generation device (200); and a blade control device (300a, 300b, 300c) for controlling at least one of (i) a pitch angle of the at least one blade (230a, 230b, 230c) or (ii) a yaw angle of the wind power generation device (200), based on at least one of the wind direction or the wind speed detected by the blade wind detecting device (400, 400a, 400b, 400c).

A method of controlling an operation of a floating wind turbine which performs a yaw rotation, a roll rotation and a pitch rotation, which controls a parameter of the operation of the wind turbine by determining a pitch rotation; determining a roll rotation; calculating a pitch difference between the determined pitch rotation and a wind turbine pitch reference; calculating a roll difference between the determined roll rotation and a wind turbine roll reference; determining a pitch and roll impact value based on the pitch difference and the roll difference; determining a reference of the parameter based on a predefined reference of the parameter and the pitch and roll impact value; and controlling the parameter of the wind turbine based on the reference of the parameter.

To provide methods and systems for determining reliability or correct functioning of load sensors in wind turbines.SOLUTION: The present disclosure relates to a method for determining reliability of one or more load sensors in a wind turbine. The method comprises measuring loads with the load sensors during operation of the wind turbine; determining in-plane moments based on the measured loads; selecting the in-plane moments with 1 p frequency; and comparing the selected in-plane moments with theoretical in-plane moments due to the mass of the blade. The method then comprises determining that the load sensors have reduced reliability if the selected in-plane moments deviate from the theoretical in-plane moments by more than a first threshold value. The present disclosure also relates to wind turbine systems incorporating load sensors, and methods for on-line determination of correct functioning of load sensors mounted on a wind turbine blade.SELECTED DRAWING: Figure 3A

According to an embodiment, the method is for operating a wind turbine having a rotor with at least one rotor blade and a setting system which is configured to change the operation of the wind turbine. The method includes a step in which first trigger information is provided, wherein the first trigger information is representative of whether the torsional movement of at least one rotor blade exceeds a threshold. If this is the case, a first output signal is generated which is configured to cause the setting system to change the operation of the wind turbine in order to reduce the torsional movement of the at least one rotor blade.

According to an embodiment, the method is for operating a wind turbine (100) having a rotor (10) with at least one rotor blade (1, 2, 3) and a setting system (31, 32) which is configured to change the operation of the wind turbine. The method comprises a step in which first trigger information (Ia1) is provided, wherein the first trigger information is representative of whether the torsional movement of at least one rotor blade exceeds a threshold. If this is the case, a first output signal (OS1) is generated which is configured to cause the setting system to change the operation of the wind turbine in order to reduce the torsional movement of the at least one rotor blade.

The invention provides a computer-implemented method of controlling operation of a wind turbine in which a plurality of wind turbine zones are defined. The method comprises, for each of the plurality of wind turbine zones: receiving sensor data from at least one electromagnetic radiation sensor arranged to monitor the respective wind turbine zone; and, determining, based on the received sensor data, whether one or more people are in the respective wind turbine zone. The method comprises selecting an operational mode of the wind turbine based on the determination as to which of the plurality of zones have one or more people therein, and controlling the wind turbine to operate in the selected operational mode.

A fitting (1) for a pressurized fluid circuit comprises an impeller (16) drivable in rotation by the pressurized fluid crossing the fitting. The impeller supports a plurality of magnets (18) coupled to a plurality of coils (20) for generating an electric current in the presence of a variable magnetic field generated by the rotation of the magnets.

The invention relates to a hydraulic machine which is designed such that a forced water flow flows through same, wherein the hydraulic machine comprises a rotor (7) and a housing surrounding the rotor (7), wherein the rotor (7) has a plurality of blades or paddles (2). According to the invention, at least one fixed position sensor (5) is arranged in the housing, wherein the position sensor (5) is arranged next to the movement path of the blades or paddles (2), such that it outputs a measurement signal when a blade or paddle (2) passes close by. In addition, a reference sensor is arranged in the hydraulic machine for detecting the current angular position of each blade or paddle (2), such that the dynamic behaviour of each blade or paddles (2) can be determined from this position data.

The invention relates to a method for aligning the shafting of a hydroelectric power plant, comprising the following steps: S1: setting the shafting into rotational motion; S2: while the shafting rotates, the control unit (9) continuously acquiring the signals generated by the vibration sensors (3.1, 3.2) and the angle sensor (4); S3: the control unit (9) analyzing the continuously acquired signals with respect to the concentricity of the shafting; S4: the control unit (9) outputting at least one notification; S5: stopping the rotational motion of the shafting; S6: if necessary, performing a corrective action.

Method for aligning the shaft train of a hydroelectric power plant, which includes the following steps: S1: The wave train is set into rotational motion; S2: While the shaft train rotates, the signals generated by the vibration sensors (3.1, 3.2) and the angle encoder (4) are continuously recorded by the control unit (9); S3: Evaluation of the continuously recorded signals with regard to a complete rotation of the wave train by the control unit (9); S4: Output of at least one message by the control unit (9); S5: Stopping the rotation of the shaft train; S6: If necessary, implement a corrective action.

A method for detecting at least one property of a component (13, 27, 36) of or for a wind turbine blade (3), comprising: inducing (S1), by applying a primary magnetic field (25), a current (24) in a microwire (15) integrated in the component (13, 27, 36), measuring (S2) a secondary magnetic field (26) generated by the current (24) induced in the microwire (15), and determine (S1), based on the measured secondary magnetic field (26), the at least one property of the component (13, 27, 36). The method provides for efficient contactless structural health monitoring.