Abstract: The disclosure relates to a method for monitoring an electricity supply grid, wherein the electricity supply grid has a grid frequency and a grid topology with a plurality of grid nodes, a plurality of converter-controlled infeed units are each connected to the electricity supply grid via a grid connection point, and the grid connection points are distributed over the grid topology, comprising the steps of acquiring in each case at least one node voltage at the grid connection point or at a grid node, assigned to the grid connection point, of the plurality of grid nodes, such that a plurality of node voltages are acquired, wherein each grid connection point or grid node is assigned a location in the grid topology, which is referred to as node location, and the acquired node voltage is characterized by a node phase angle as phase angle of the node voltage, assigning an associated node location to each node voltage, and ascertaining grid statuses distributed over the grid topology from the acquired node voltage

Abstract: The invention relates to a method for controlling a wind power installation which has a rotor having rotor blades that are adjustable in terms of their blade angle, and having a rotor diameter, wherein the rotor is able to be operated at a variable rotor rotating speed; and a region in which the rotor blades move forms a danger zone for birds and bats, the method comprising the following steps: checking whether a bird or bat approaching the wind power installation is an endangered bird and if an endangered bird has been identified, detecting a bird position as the current position of the endangered bird identified; and controlling the rotor rotating speed as a function of the bird position in relation to the wind power installation; wherein the rotor rotating speed is reduced in multiple stages or continuously as the distance of the bird position from the wind power installation decreases.

Abstract: A method for controlling an electrical distribution grid, comprising the following steps: determining at least one variable which describes a state of the electrical distribution grid; combining a plurality of electrical installations, in particular a plurality of regenerative generating units, of the electrical distribution grid to form a virtual power plant, in particular taking into consideration the variable; establishing a control area within the electrical distribution grid for the virtual power plant; establishing a control unit of an electrical installation of the virtual power plant as main control unit; controlling the control area using the main control unit of the virtual power plant.

Abstract: A method of determining a corrected wind speed in the region of a wind turbine including the steps of measuring a wind speed in the region of a wind turbine, determining a force exerted on at least one rotor blade by the wind, determining a wind speed difference value which is dependent on the determined force and determining a corrected wind speed by correcting the measured wind speed in dependence on the wind speed difference value. A wind turbine for carrying out the method.

Abstract: Provided is a method for operating an electrical storage station on an electrical supply network. The network has electrical consumers, the storage station, and at least one wind power installation to generate electrical power from wind. The method includes generating electrical power by way of the installation as generated wind power, and feeding a feed-in power into the network. The electrical feed-in power at least results from the generated wind power and a storage power taken up or output by the storage station. The feeding of the feed-in power into the network is controlled depending on a station state of charge and a wind and/or power forecast. Changes in the feed-in power over time are controlled depending on the wind and/or power forecast and a limit gradient is specified to limit the changes in the feed-in power thereto. The limit gradient is specified depending on the wind and/or power forecast.

Abstract: Provided is a method for controlling a wind turbine, in particular an electric generator of said wind turbine. The method includes an optimization during which a suitable operating parameter for controlling said wind turbine or generator thereof is determined, in particular in an iterative manner. The optimization includes providing a multidimensional space comprising a plurality of parameters; providing an objective function for said multidimensional space, e.g., a simplex has a shape of a triangle or a tetrahedron; and determining one parameter of said multidimensional space as a suitable operating parameter by applying said objective function to said multidimensional space, in particular in an iterative manner. The method includes selecting a suitable operating parameter as an operating parameter for said wind turbine or generator thereof; and operating said wind turbine or generator based on said operating parameter, in particular by controlling a converter connected to said generator.

Abstract: The disclosure relates to a generator segment of a segmented generator, in particular of a permanently excited segmented rotary generator, of a wind turbine, comprising a rotor segment of a rotor, and a stator segment of a stator, wherein the rotor segment and the stator segment in an operation position are disposed so as to be mutually spaced apart in a radial direction by an air gap, and are disposed so as to be mutually spaced apart in an axial direction by an axial spacing; wherein the rotor segment and the stator segment are able to be disposed and/or displaced relative to one another along a rotation axis by the axial spacing, between an operation position and a transport position that is different from the operation position.

Abstract: Provided is a method for operating a wind turbine having a generator and a rotor with rotor blades. The method includes generating electrical power from wind using the generator, using a first part of the generated power as an auxiliary component for supplying auxiliary devices of the turbine used for operating the turbine, where the auxiliary component varies up to a limit. The method includes feeding a second part of the generated electrical power into a grid as a feed-in component, checking the grid for a grid fault that does not allow feeding power into the grid and continuing the operation of the turbine when the fault is detected. The generation of power from wind is reduced to a cut-back power that corresponds to the limit the auxiliary component for operating the auxiliary devices is used from the cut-back power and remaining residual power of the cut-back power is consumed.

Abstract: Provided is a method for detecting low-frequency oscillations, in particular subsynchronous resonance, in an electrical supply grid, wherein the electrical supply grid has a grid voltage at a grid nominal frequency, comprising the steps of capturing at least one electrical signal from the electrical supply grid, and evaluating the electrical signal by means of wavelet analysis, during which a time-dependent frequency pattern is created by analyzing a correlation of the captured signal with a predetermined wavelet mother function, wherein the presence of a low-frequency oscillation is assumed if at least one further low-frequency frequency component is present in the time-dependent frequency pattern in addition to a fundamental component.

Abstract: A method for feeding electric power into an electric supply network using a wind park having wind power installations is provided. An expected power is determined for a predetermined feed-in period, where the expected power indicates a power value or temporal profile of power expected to be available to the park as power from wind in the predetermined feed-in period. An expected accuracy is determined and is a measure of how accurately the power reaches the expected power in the feed-in period. To determine the expected power, at least one expected wind variable representative of the expected wind speed is determined using a weather forecast, and the expected wind variable is additionally determined or verified, proceeding from the weather forecast, using a correction rule based on local weather data and/or operating data of the park. The expected power is determined on the basis of the expected wind variable.

Abstract: A method for determining a rotor orientation of a rotor of a wind turbine, the rotor having a rotor blade, to a method for determining a geographical position of a rotor of a wind turbine, the rotor having a rotor blade, to a wind turbine and to a wind farm. A method for determining a rotor orientation of a rotor of a wind turbine, the rotor having a rotor blade, comprising the steps of: receiving at least two sets of position data of a GNSS receiver arranged in the rotor blade, the two sets of position data representing two different horizontal positions of the GNSS receiver; and ascertaining the rotor orientation of the rotor on the basis of the position data.

Abstract: A method for providing data sets for the units, in particular wind turbines, of a wind park. The wind park is divided into at least two groups, wherein at least one group, a plurality of groups or all groups in each case have at least two units. An individual data set is first generated in each case for each of the groups. A data packet which comprises at least the generated individual data sets is then generated and the data packet is then transmitted to all units of the wind park. A wind park controller, a method for receiving a data set, a unit and a wind park is also provided.

Abstract: A method for detecting an accretion of ice on a rotor blade of a rotor of a wind turbine is provided. The can be operated at a variable rotational speed. The method includes recording a wind speed of a wind acting upon the rotor, recording an operating variable that is dependent on the wind speed and comparing the recorded operating variable or the recorded wind speed with a reference variable of a characteristic wind-speed-dependent operating-variable curve of the wind turbine. The characteristic operating-variable curve indicates an operating variable assumed to be optimal in dependence on the wind speed. The method includes detecting an accretion of ice on the rotor blade if the recorded operating variable or the recorded wind speed, deviates from the reference variable by at least a predetermined minimum deviation specified in dependence on the wind speed.

Abstract: A measuring system and an associated measuring method for measuring a stator of a gearless wind power installation, wherein the measuring system has an air gap measuring unit and a position determination unit, wherein the air gap measuring unit has a holding apparatus and a distance sensor, wherein the holding apparatus is set up to mount the air gap measuring unit on a rotor of the wind power installation, wherein the distance sensor is set up to provide a signal which is indicative of an extent of an air gap between the stator and the rotor, wherein the position determination unit is set up to be mounted on the rotor of the wind power installation and to capture the signal from the distance sensor during a rotation of the rotor at a plurality of revolution positions. The measuring system and the associated measuring method make it possible to measure a stator in a simplified manner.

Abstract: A blade for a wind turbine having an airfoil with a thickness of at least 20% and in particular at least 25% including a vortex generator pair between chord wise position 20% c and 70% c, the vortex generator pair including 2 not directly connected fins and a base which interconnects the fins and where the fins are placed under opposite angles of attack. The fins are cambered by at least 1% in particular by at least 2% and more particularly by a least 3% of the fin chord. According to an embodiment the base of the vortex generator pair is W-shaped, the fins of a pair are designed to generate contra rotating vortices and the distance between the suction sides of the fins is approximately 150% of that between the pressure sides and the trailing part of the fins is rounded so that non-concentrated vortices are generated.

Abstract: A wind turbine is having at least one rotor blade, a blade heating system for heating at least a portion of the at least one rotor blade, at least one temperature sensor for sensing the external temperature in the region, or in the environment, of the wind turbine, at least one air humidity sensor for sensing the air humidity in the region, or in the environment, of the wind turbine, and a control unit for activating the blade heating system if the temperature falls below a temperature limit value and if an air humidity limit value is exceeded, the temperature limit value being +5° C. and the air humidity limit value being 70%.

Abstract: The invention relates to a method for feeding electrical power into an electrical supply network by means of at least a first and a second wind farm. A first electrical wind farm output is provided by the first wind farm to be fed into the electrical supply network and a second electrical wind farm output is provided by the second wind farm to be fed into the electrical supply network, and a total power output is generated from at least the first and second wind farm output and fed into the electrical supply network, wherein a central control unit for controlling the total power output that is fed in controls the provision of at least the first and second wind farm output.

Abstract: A gripping device for handling reinforcement cages for tower segments of a wind turbine, comprising a gripper arm holding fixture and multiple gripper arms arranged radially on the gripper arm holding fixture. In particular, it is proposed that there is a coupling mechanism that can be connected with the reinforcement cage on each gripper arm, the length of the gripper arms can be telescopically motor-adjusted, the gripping device can be coupled with a lifting device that can be moved horizontally and vertically, and is adapted to move a reinforcement cage from apparatus for manufacturing reinforcement cages and/or to put a reinforcement cage down in a casing for creating a tower segment.

Abstract: The present invention concerns a forming process for hot forming of a steel sheet of a rotor blade to be produced of a wind power installation, including the steps heating the steel sheet in a furnace while the steel sheet is lying on a hearth bogie, displacing the heated steel sheet with the hearth bogie from the furnace into a pressing apparatus for the hot forming operation, transloading the heated steel sheet in the pressing apparatus from the hearth bogie on to a form bogie having a counterpart form, and pressing the steel sheet by at least one pressing punch which presses on the steel sheet in such a way that it is formed between the pressing punch and the counterpart form and in particular assumes the shape of the pressing punch and the counterpart form.

Abstract: A wind turbine tower is provided with a plurality of tower segment which are placed one on top of the other in order to form the tower. A lower tower segment has a lower end face, and in the lower region of the lower tower segment, the lower tower segment has a plurality of recesses and through-bores between the lower end face of the lower tower segment and a base of the recesses. The recesses are designed to receive a leveling unit for leveling the lower tower segment. The recesses are preferably provided on the inner face of the lower tower segment and provide an effective possibility for receiving leveling units.