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

A fluid-turbine system, method and apparatus optimizes wind-turbine performance by use of sensors embedded on a shroud and/or ejector shroud. The sensors monitor visible or audible movement, vibration, acoustic waves or temperature. A combination of sensors and monitoring means comprises a method for preventing or mitigating the negative effects of dormant failure.

The invention provides a method of determining tower top acceleration of a wind turbine. The method includes receiving acceleration data from a plurality of acceleration sensors positioned in a nacelle of the wind turbine, including data indicative of a measured acceleration in a direction along at least one measurement axis of each respective acceleration sensor at a current time step. The method includes determining a predicted tower top acceleration of the wind turbine tower at the current time step, the predicted tower top acceleration being determined in dependence on a kinematic model of the wind turbine, and on a determined estimation of tower top acceleration at a previous time step. The method includes determining an estimated tower top acceleration of the wind turbine tower at the current time step by updating the predicted tower top acceleration based on the measured acceleration from each of the acceleration sensors.

A system for optimizing performance of a wind turbine during noise reduced operation includes a supervisory controller and a converter controller. The converter controller is configured to perform a plurality of operations including operating the wind turbine at a first optimization mode or a second optimization mode. The first optimization mode includes actively adjusting a power output of the wind turbine based on grid parameter(s) so as to maximize energy production of the wind turbine without accelerating consumption of life of component(s) thereof. The second optimization mode includes operating the wind turbine at a maximum power output rating while tracking remaining life of the component(s) based on a plurality of parameters. When the remaining life of the component(s) exceeds a predetermined threshold, the converter controller generates a notification to indicate that a maintenance action is needed.

Embodiments according to the present invention include a device for providing an electrical test signal, for performing a continuity test of an electrical line of an object, including: a communication module configured to receive an activation signal for switching the device from a passive operating mode to an active operating mode, and to obtain a deactivation signal for switching the device from the active operating mode to the passive operating mode. Furthermore, the device includes a signal generator configured to generate the electrical test signal in the active operating mode. In addition, the device includes an energy source configured to supply the communication module and the signal generator with energy. The device also includes a coupling-in module configured to couple the electrical test signal into the electrical line of the object in the active operating mode.

A fluid-turbine system, method and apparatus optimizes wind-turbine performance by use of sensors embedded on a shroud and/or ejector shroud. The sensors monitor visible or audible movement, vibration, acoustic waves or temperature. A combination of sensors and monitoring means comprises a method for preventing or mitigating the negative effects of dormant failure.

A method of disengaging a rotor-lock of a wind turbine, the rotor comprising one or more blades, which due to the gravitational pull, generates a rotor torque which is opposed by a rotor-lock counter-torque from the rotor-lock, the method comprising: a) determining a direction of the rotor torque with a sensor system; b) applying a rotor-drive counter-torque to the rotor with a rotor-drive system, wherein the rotor-drive counter-torque acts to oppose the determined rotor torque and causes the rotor-lock counter-torque to reduce; c) during or after the application of the rotor-drive counter-torque, disengaging the rotor-lock mechanism; wherein the step of determining a direction of the rotor torque comprises applying a torque restriction to the rotor-drive based on the determined direction of the rotor torque, the torque restriction preventing the application of torque to the rotor by the rotor-drive system in the same direction as the rotor torque.

A method of determining tower top acceleration of a wind turbine is provided. The method includes receiving acceleration data from a plurality of acceleration sensors positioned in a nacelle of the wind turbine, including data indicative of a measured acceleration in a direction along at least one measurement axis of each respective acceleration sensor at a current time step. The method includes determining a predicted tower top acceleration of the wind turbine tower at the current time step, the predicted tower top acceleration being determined in dependence on a kinematic model of the wind turbine, and on a determined estimation of tower top acceleration at a previous time step. The method includes determining an estimated tower top acceleration of the wind turbine tower at the current time step by updating the predicted tower top acceleration based on the measured acceleration from each of the acceleration sensors.

A system (100) for refurbishing an original wind turbine is provided. The system (100) comprises at least one processor (210) configured to: retrieve the average wind speed at the wind turbine site; determine suitable dimensions for a refurbished wind turbine (100) adapted for the wind turbine site; determine which parts of the original wind turbine that could be re-used and still obtain the determined dimensions for the refurbished wind turbine (100); for each part of the original wind turbine that could be re-used, calculate the expected remaining lifetime of said part; if said expected remaining lifetime is above a predetermined minimum lifetime, determine that said part can be re-used in the refurbished wind turbine (100); and select, from a database of replacement wind turbine parts, parts to use instead of the parts needing to be replaced for refurbishing the original wind turbine. Further, a method (400) for refurbishing an original wind turbine is provided.

Provided are a smoke visualization detection system and method for a wind generating nacelle. When the video monitoring module judges that smoke exists in the wind generating nacelle, it issues a smoke change instruction; the smoke detection module collects smoke visualization detection data for a plurality of collection time intervals; the data analysis module analyses the smoke visualization detection data, calculates a sub-smoke visualization detection data change coefficient and a smoke visualization detection data transmission coefficient; the environment analysis module determines a historical transmission behavior and current data transmission environment data, and calculates a data transmission influence coefficient; the data transmission module obtains a target smoke visualization detection data transmission coefficient based on the data transmission influence coefficient, and adjusts a data transmission strategy, to ensure the transmission speed of the smoke visualization detection data, improves transmission stability and real-time performance, and enhances the fire safety level of the nacelle.