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公开(公告)号：US11552498B2
公开(公告)日：2023-01-10
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：US11411405B2
公开(公告)日：2022-08-09
申请号：US17183143
申请日：2021-02-23
摘要： Provided is a method of feeding electric power at a grid connection point into an electric power grid having a grid voltage using a converter-controlled feeder, in particular using a wind energy system and/or of a storage unit. The method includes feeding the electric power into the electric power grid in a normal operating mode when no grid fault or grid malfunction has been detected in the electric power grid, and switching to a fault mode when a grid fault or grid malfunction has been detected, in which the grid voltage is increased or decreased. In the normal operating mode an active current is fed in in order to feed active electric power into the grid and if the need arises a reactive electric power is additionally fed into the grid by a reactive current. The combination of the active and reactive currents results in an apparent current.
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公开(公告)号：US11916391B2
公开(公告)日：2024-02-27
申请号：US17119414
申请日：2020-12-11
CPC分类号： H02J3/381 , F03D7/048 , H02J1/106 , H02J1/14 , H02J3/007 , H02J3/04 , H02J3/14 , H02J3/1814 , H02J2300/28
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：US11511639B2
公开(公告)日：2022-11-29
申请号：US16633914
申请日：2018-07-24
IPC分类号： B60L53/31 , H02J7/00 , H02J1/10 , B60L53/67 , B60L53/62 , B60L53/16 , H02J7/04 , B60L53/10 , B60L53/60
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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公开(公告)号：US20210265841A1
公开(公告)日：2021-08-26
申请号：US17183143
申请日：2021-02-23
摘要： Provided is a method of feeding electric power at a grid connection point into an electric power grid having a grid voltage using a converter-controlled feeder, in particular using a wind energy system and/or of a storage unit. The method includes feeding the electric power into the electric power grid in a normal operating mode when no grid fault or grid malfunction has been detected in the electric power grid, and switching to a fault mode when a grid fault or grid malfunction has been detected, in which the grid voltage is increased or decreased. In the normal operating mode an active current is fed in in order to feed active electric power into the grid and if the need arises a reactive electric power is additionally fed into the grid by a reactive current. The combination of the active and reactive currents results in an apparent current.
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公开(公告)号：US11949352B2
公开(公告)日：2024-04-02
申请号：US17255234
申请日：2019-06-17
发明人： Stefan Gertjegerdes , Jair Cassoli
CPC分类号： H02P21/0003 , F03D7/042 , F03D9/25 , H02K7/183 , H02P25/22 , F05B2220/7062 , F05B2270/326 , F05B2270/342
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：US11264798B2
公开(公告)日：2022-03-01
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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公开(公告)号：US11190019B2
公开(公告)日：2021-11-30
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：US10958077B2
公开(公告)日：2021-03-23
申请号：US16334663
申请日：2017-09-22
摘要： Provided is a method for generating a multiphase electrical alternating current having a sinusoidal fundamental wave in each phase by a multiphase inverter of a wind power installation. The multiphase inverter is controlled by a tolerance band method which respectively has an upper and a lower band limit for each of the phases of the inverter. The inverter has, for each phase, an upper switch for generating a positive sine half-wave of the alternating current of the phase and a lower switch for generating a negative sine half-wave of the alternating current of the phase. The method includes generating the positive sine half-wave by the upper switch and generating the negative sine half-wave by the lower switch based on the band limits of the phase, and changing at least one of the band limits such that a signal component superimposed on the respective sinusoidal fundamental wave is reduced.
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公开(公告)号：US11788508B2
公开(公告)日：2023-10-17
申请号：US17144818
申请日：2021-01-08
CPC分类号： F03D7/0284 , F03D9/255 , G01R19/0038 , G01R27/16 , H02J3/381 , H02J3/44 , H02J2300/28
摘要： A method for controlling a wind power installation includes measuring a grid voltage of an electrical power supply grid, setting a DC-link voltage at a converter of the wind power installation depending on the measured grid voltage and using a first time constant and a second time constant, wherein the first time constant is different than the second time constant.
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