Abstract: The disclosure relates to operating a wind turbine generator during heating operation that includes a rotor and a stator. The stator includes a first three-phase system with three first drivetrains and a second three-phase system with three second drivetrains. The rotor is configured to generate a magnetic field and inject an electric current into the first and second three-phase systems during a rotation with the magnetic field. The first three-phase system includes a first switch for short-circuiting the first drivetrains in a closed state and idling them in an open state. The second three-phase system includes a second switch for short-circuiting the second drivetrains in a closed state and idling them in an open state. The heating operation includes a first phase in which the first switch is switched to the closed state and the second switch is switched to the open state, or vice-versa.

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: Method for controlling a rotor speed of a rotor of a wind turbine at rated or curtailed operation conditions the rotor being an aerodynamic rotor having one or a plurality of rotor blades, and the wind turbine further having a tower and a generator wherein a pitch control provides a pitch angle set value depending on an actual rotor speed for setting a pitch angle of the rotor blades, a main control provides a main power or torque set value for controlling the power or torque of the generator, and an additional control provides an additional power or torque set value depending on the actual rotor speed, wherein the additional power or torque set value is provided as an offset value and is added to the main power or torque set value respectively, wherein the additional power or torque set value is calculated depending on a control deviation of the rotor speed, and optionally, in combination with the additional control, or instead of it, a maximum power control provides a maximum power value as a varying value

Abstract: A charging station for charging electric vehicles is provided. The charging station includes a plurality of AC charging terminals, each for charging an electric vehicle by means of alternating current. Each of the AC charging terminals is connected to a three-phase power supply via a respective phase-change device in order to be supplied thereby with three-phase electric current. The power supply has three supply lines for providing three voltage phases, and each AC charging terminal has three connection lines for connection to the three supply lines, for applying the three voltage phases to the connection lines. Each phase-change device is set up to change a connection assignment between the three supply lines and the three connection lines.

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 planning a power exchange between a charging infrastructure and an electricity supply grid. The infrastructure has a plurality of terminals for connecting and charging electric vehicles such that the electric vehicles can exchange power with the grid via the terminals. Each electric vehicle has an electrical storage unit with a variable individual state of charge for drawing and outputting power, and all of the storage units connected to the infrastructure form an overall storage unit of the infrastructure, which overall storage unit is characterized by a total storage capacity and a total state of charge that are variable. The prediction of arrival times of the vehicles at the terminals thereof is created, and a total state of charge prediction is created for a prediction period depending on the prediction of the arrival times, wherein the total state of charge prediction is created as a time profile.

Abstract: The present disclosure relates to a method for controlling an electrical generator of a wind turbine, the generator having a rotor and a stator, and the stator being controlled by a stator current. The stator current has a main component being characterized by a fundamental signal with a fundamental frequency and a fundamental phase angle, and a fractional harmonic current component being characterized by a fractional harmonic signal having a fractional harmonic frequency and a fractional harmonic phase angle. The method includes providing a compensation current having a compensation amplitude and a compensation phase angle, and determining the compensation phase angle depending on an absolute rotational position of the rotor.

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: The present disclosure relates to a method for assessing a wind power installation, wherein a comparison is made between a test wind power installation and a comparison wind power installation for assessment purposes, comprising the steps of: synchronously operating the test wind power installation and the comparison wind power installation in an adjustment interval in an adjustment mode, in which the test wind power installation and the comparison wind power installation have matching operating settings, synchronously recording performance data relating to both wind power installations in each case in the adjustment interval in the adjustment mode, modifying the test wind power installation and/or the comparison wind power installation in a modification step such that the test wind power installation and the comparison wind power installation differ from one another, synchronously operating the test wind power installation and the comparison wind power installation, which differ from one another, at least in

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: 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: 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 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: Method for de-icing at least one rotor blade of a rotor of a wind power installation, wherein the rotor is able to be operated at a variable rotating speed and the wind power installation generates an output from wind, said method comprising the following steps: checking for an icing situation on the at least one rotor blade, and changing from a normal operation of the wind power installation without de-icing to a de-icing operation if an icing situation has been identified; wherein in the de-icing operation the at least one rotor blade is heated for de-icing, and the rotating speed and/or the generated output are/is reduced as a function of at least one environmental condition of the wind power installation; wherein the at least one environmental condition is selected from the list including an external temperature of the wind power installation and a wind speed in the region of the wind power installation.

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 operating a first wind power installation comprising a rotor having a rotor blade that is adjustable with a pitch angle, which generates an electrical power and in the wake of which a second wind power installation is located in at least one wake wind direction, comprising the step of: operating the first wind power installation in a substantially wake-free normal mode with a first pitch characteristic, and operating the first wind power installation in a wake-loaded wake mode with a second pitch characteristic, wherein the first pitch characteristic represents a first profile of the pitch angle and the second pitch characteristic represents a second profile of the pitch angle as a function of the electrical power, wherein the pitch angle of the second pitch characteristic is greater than the pitch angle of the first pitch characteristic for at least one range of the electrical power.