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公开(公告)号：US20180219376A1
公开(公告)日：2018-08-02
申请号：US15746632
申请日：2016-07-13
CPC分类号： H02J3/01 , F03D7/044 , F03D9/255 , F03D17/00 , G01R19/0084 , G01R19/2513 , G01R25/00 , G05B19/05 , G05B2219/13095 , H02J3/24 , H02J3/386 , H02M1/12 , Y02E10/725 , Y02E10/763
摘要： A method for recording the magnitude and phase of the electrical voltage in an electrical three-phase supply network for a fundamental and at least one harmonic is provided. The method includes measuring an electrical three-phase voltage of the supply network, transforming the measured voltage values into polar coordinates using a rotating voltage phasor for the fundamental as a measured reference phasor, and respectively observing values of at least one voltage phasor for the fundamental and of at least one voltage phasor for at least one harmonic to be recorded with the aid of a state observer, and tracking the observed values on the basis of the measured reference phasor.
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公开(公告)号：US20210184469A1
公开(公告)日：2021-06-17
申请号：US17119414
申请日：2020-12-11
摘要： Provided is a method for controlling a wind power installation and/or a wind farm having at least one wind power installation, particularly in the case of asymmetrical network voltages, comprising: measuring a first voltage of a first phase, a second voltage of a second phase and a third voltage of a third phase of a three-phase electrical system, calculating a symmetrical negative-sequence voltage system from the measured voltages including a first negative-sequence voltage, a second negative-sequence voltage and a third negative-sequence voltage, predefining setpoints for a negative-sequence current system depending on the calculated, symmetrical negative-sequence voltage system including a first negative-sequence current component, a second negative-sequence current component and a third negative-sequence current component, wherein the setpoints are defined such that a balancing of the measured voltages is achieved, feeding an asymmetrical three-phase AC current into a wind farm network or an electrical supply network depending on the predefined setpoints.
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公开(公告)号：US20180069499A1
公开(公告)日：2018-03-08
申请号：US15559765
申请日：2016-03-23
CPC分类号： H02P21/13 , H02P6/10 , H02P9/02 , H02P25/22 , H02P2101/15
摘要： A method for controlling a synchronous generator of a gearless wind turbine is disclosed. The synchronous generator has an electrodynamic rotor and a stator for producing electrical power by rotating the rotor relative to the stator. The method includes generating a multiphase output current at the stator, supplying the output current to a rectifier, and controlling the output current using the rectifier in such a manner that a torque ripple of the generator is reduced.
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公开(公告)号：US20220145855A1
公开(公告)日：2022-05-12
申请号：US17433390
申请日：2020-02-26
发明人： Ingo MACKENSEN , Kai BUSKER , Stefan GERTJEGERDES
IPC分类号： F03D7/02
摘要： 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.
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公开(公告)号：US20210129701A1
公开(公告)日：2021-05-06
申请号：US16633924
申请日：2018-07-26
摘要： A charging station for charging a plurality of electric vehicles, in particular electric automobiles, comprising: a supply device, in particular for connection to an electricity supply grid for supplying the charging station with electric power, a plurality of charging terminals for charging in each case at least one electric vehicle, and each charging terminal comprises a supply input for drawing electric power from the supply device, a charging output with one or more charging connections for outputting a respective charging current for charging a respective connected electric vehicle, and at least one DC chopper arranged between the supply input and the charging output in order to generate a respective chopper current from the electric power of the supply device, or as an alternative at least one chopper terminal arranged between the supply input and the charging output in order to provide a chopper current generated outside the charging terminal by a DC chopper, in particular chopper current generated in the supply device, wherein in each case each charging current is formed from a chopper current or a plurality of chopper currents, and wherein the charging terminals are connected to one another at exchange connections via electrical exchange lines in order thereby to exchange chopper currents with one another.
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6.发明申请公开(公告)号：US20200227918A1
公开(公告)日：2020-07-16
申请号：US16651317
申请日：2018-10-01
发明人： Kai BUSKER , Stefan HELLER , Stefan GERTJEGERDES , Ingo MACKENSEN , Juri WILHELM
摘要： Provided is a method of supplying at least one component of a wind turbine with energy. The energy during operation of the wind turbine is taken from energy generated using a generator of the wind turbine and provided for supply to the at least one component of the wind turbine. Provided is an energy supply device for performing the method and a wind turbine having the energy supply device.
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公开(公告)号：US20200072192A1
公开(公告)日：2020-03-05
申请号：US16467738
申请日：2017-12-19
IPC分类号： F03D7/02
摘要： A method for controlling a wind power installation, wherein the wind power installation has an aerodynamic rotor with rotor blades that are individually adjustable in their blade angle and the rotor can be operated with a variable rotational rotor speed, and the wind power installation has a generator coupled to the aerodynamic rotor, for generating a generator output, comprising the steps of: individually adjusting each blade angle in a way corresponding to an individual setpoint blade angle, wherein each setpoint blade angle is made up of a common basic angle, which is specified for all of the rotor blades, and an individual compensatory angle, to allow for individual load torques, detecting in each case at least one load torque on each of the rotor blades, or a variable that is representative of this, wherein for each rotor blade considered, there is a preceding rotor blade and the setpoint blade angle of each rotor blade considered is determined in dependence on the at least one load torque of its preceding rotor blade.
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公开(公告)号：US20210313828A1
公开(公告)日：2021-10-07
申请号：US17268905
申请日：2019-07-29
摘要： A method for controlling an electrical consumer is provided. The electrical consumer is coupled to an electricity supply grid using a frequency converter. The electricity supply grid has a line voltage and is characterized by a nominal line voltage. The electricity supply grid is monitored for a grid fault in which the line voltage deviates from the nominal line voltage by at least a first differential voltage. When the grid fault occurs, the electrical consumer remains coupled to the electricity supply grid, and a power consumption of the electrical consumer is changed on the basis of the deviation of the line voltage from the nominal line voltage.
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公开(公告)号：US20210119563A1
公开(公告)日：2021-04-22
申请号：US17255234
申请日：2019-06-17
发明人： Stefan GERTJEGERDES , Jair CASSOLI
摘要： Provided is a method for controlling, by means of field-oriented closed-loop control, an active rectifier which is electrically connected to a stator of a generator of a wind turbine. The generator has a rotor which is mounted so as to be rotatable about the stator and comprises the steps of determining a mechanical position of the rotor with respect to the stator, predefining DC components of rotor-fixed d and q coordinates for at least one 3-phase stator current, determining an AC component for the q coordinate at least as a function of the mechanical position of the rotor, modulating the determined AC component of the q coordinate onto the predefined DC component of the q coordinate, so that a modulated q coordinate is produced which has a DC component and an AC component, and controlling the active rectifier at least as a function of the modulated q coordinate and preferably as a function of the d coordinate.
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公开(公告)号：US20210101500A1
公开(公告)日：2021-04-08
申请号：US16633914
申请日：2018-07-24
摘要： A charging station for charging a plurality of electric vehicles, in particular electric cars, comprising: a supply device, in particular for connecting to an electricity supply grid, for supplying the charging station with electric power, a plurality of charging terminals each for charging at least one electric vehicle, and each charging terminal comprises a supply input for drawing electric power from the supply device, a charging output having one or more charging terminals each for outputting a charging current for respectively charging a connected electric vehicle, and at least one DC current controller, arranged between the supply input and the charging output, for generating a respective controlled current from the electric power from the supply device, wherein each charging current (IL1, IL2) is formed from a controlled current or from a plurality of controlled currents (IS1, IS2, IS3), and wherein the charging terminals are connected to one another at exchange terminals by way of electrical exchange lines in order to exchange controlled currents with one another by way of said exchange lines.
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