Patent application number | Description | Published |
20100279157 | ACCUMULATOR - An accumulator with an accumulator housing, having at least one cell changer, with several electrodes and liquid electrolyte in each cell chamber with at least one wall element in the cell chambers to divide the cell chambers into at least two intercommunicating volume chambers. In the lower region of the volume chambers is a communicating connection for the liquid electrolyte between the volume chambers and a pressure equalisation connection between the volume chambers is arranged in the upper region of the volume chambers to assure an equivalent air pressure in the intercommunicating volume chambers. The wall elements extend at least far upwards such that on movement of the accumulator firstly electrolyte in at least one volume chamber flows through the intercommunicating connection in the lower region and secondly electrolyte again flows through the intercommunicating connection in the lower region out of said at least one volume region without an overflow of liquid electrolyte from one volume chamber to the adjacent volume chamber over the upper edge of the wall elements. | 11-04-2010 |
20120139243 | METHOD AND SYSTEM FOR RESONANCE DAMPENING IN WIND TURBINES - A resonance damping system for a wind turbine having a generator connected to a power grid, the resonance damping system comprising an adaptive resonance damper, operable to provide a control signal for the generator, wherein the variable torque signal of the adaptive resonance damper is automatically adjusted according to a parameter which represents a grid condition. | 06-07-2012 |
20130181450 | METHOD FOR OPERATING A WIND TURBINE - A method for operating a wind turbine is provided. The wind turbine includes a rotor adapted to rotate at an optimal speed. The method includes determining a turbulence parameter; and operating the wind turbine at a speed that is increased by a speed deviation amount as compared to the optimal speed. The speed deviation amount is dependent on the turbulence parameter. A wind turbine ( | 07-18-2013 |
20130302161 | CONTROLLER OF WIND TURBINE AND WIND TURBINE - Techniques for operating a wind turbine are described herein. In an example, a wind turbine includes a tower, a nacelle coupled to the tower, a rotor rotatably coupled to the nacelle, at least one blade coupled to the rotor and configured to rotate about a pitch axis, and a controller to operate the wind turbine based on predicted wind speed values. The controller includes a twist determination module to determine a blade-twist value, wherein the blade-twist value is indicative of an actual blade-twist of a rotor blade during operation of the wind turbine. The controller may further include a wind speed determination module to determine at least one wind speed value indicative of a wind speed using the blade-twist value. | 11-14-2013 |
20140003936 | Systems and Methods to Reduce Tower Oscillations in a Wind Turbine | 01-02-2014 |
20140152010 | METHOD AND SYSTEMS FOR OPERATING A WIND TURBINE WHEN RECOVERING FROM A GRID CONTINGENCY EVENT - A method for controlling operation of a wind turbine included within a power generation and delivery system is described. The method includes receiving, by a controller, a power command signal, wherein the power command signal indicates recovery from the grid contingency event; and increasing, in a non-uniform manner, power injected into a grid by a power conversion assembly in response to the power command signal wherein the controller controls the power conversion assembly. | 06-05-2014 |
20140301842 | METHODS FOR CONTROLLING WIND TURBINE LOADING - Methods are provided for controlling wind turbine loading. In one embodiment, a method includes the steps of determining a current thrust value for the wind turbine, calculating a thrust differential based on the current thrust value and a predetermined maximum thrust value, calculating a desired pitch offset value based on the thrust differential and a thrust sensitivity value, and adjusting a pitch of the wind turbine utilizing the pitch offset value. | 10-09-2014 |
20150056072 | SYSTEM AND METHOD FOR PREVENTING EXCESSIVE LOADING ON A WIND TURBINE - Systems and methods for preventing excessive loading on a wind turbine are disclosed. The method includes: measuring an actual wind parameter upwind from the wind turbine using one or more sensors; providing the measured wind parameter to a processor; providing a plurality of wind turbine operating data to the processor; utilizing the plurality of operating data to determine an estimated wind turbine condition at the wind turbine; generating a control wind profile based on the actual wind parameter and the estimated wind turbine condition; and, implementing a control action based on the control wind profile to prevent excessive loading from acting on the wind turbine. | 02-26-2015 |