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公开(公告)号：US11561264B2
公开(公告)日：2023-01-24
申请号：US17286582
申请日：2019-09-12
发明人： José Ignacio Berasain Balda , Héctor Morato González , Samuel Ortiz Delgado , Didier Velez Castellano
摘要： Provided is a detecting device and a method for detecting a fault in a transformer of a wind turbine, wherein the transformer transforms a lower voltage, which is output from a generator of the wind turbine to a low voltage side of the transformer, to a higher voltage, which is output from the transformer at a high voltage side, the detecting device including: a voltage detection device configured to detect a voltage at a first node at the low voltage side of the transformer; a current detection device configured to detect a current at a second node at the high voltage side of the transformer. The detecting device is configured to detect the fault in the transformer based on the detected voltage and the detected current.
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公开(公告)号：US20220006414A1
公开(公告)日：2022-01-06
申请号：US17295477
申请日：2019-12-20
IPC分类号： H02P29/024 , H02H7/06 , G01R31/34 , G01R31/52
摘要： Provided is a method for determination of a location of a short circuit fault in a generator arrangement, wherein the generator arrangement includes an electrical machine and at least one channel, wherein the or each channel includes a breaker, a converter unit and a set of stator windings of the electrical machine connected to the converter unit via the breaker, wherein upon an occurrence of a short circuit in a channel, the connection between the set of stator windings and the converter unit interrupted by opening the breaker, wherein depending on at least one measured signal of a measurand, wherein the measured signal is measured by at least one sensor of the electric machine and wherein the measurand describes a torque ripple of the electrical machine, either the electrical machine or the converter unit of the channel is determined as location of the short circuit fault.
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公开(公告)号：US20210399542A1
公开(公告)日：2021-12-23
申请号：US17297559
申请日：2018-11-30
发明人： Lev Sorkin , Priyanka D. Shivthare
IPC分类号： H02H7/06 , H02P9/10 , H02P29/024
摘要： Described is a method including monitoring a point of regulation voltage input to a generator control unit and monitoring a generator output voltage as a backup point of regulation voltage input. The method also includes detecting an overvoltage fault at the point of regulation voltage input, the backup point of regulation voltage input, or both. Additionally, the method includes opening a first solid-state switch (110) in response to detecting the overvoltage fault. Opening the first solid-state switch (110) prevents provision of an input signal (104) to a generator excitation field (102). Further, the method includes opening a generator excitation field relay (112) in response to detecting the overvoltage fault. Opening the excitation field relay (112) also prevents provision of the input signal (104) to the generator excitation field (102).
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公开(公告)号：US11196369B2
公开(公告)日：2021-12-07
申请号：US16425763
申请日：2019-05-29
摘要： Protection devices prevent damage to synchronous generators during loss-of-field events. In various embodiments, a first protective element is associated with a first protection zone to protect a generator from a loss-of-field event at full load. A second protective element is associated with a second protection zone to prevent thermal overload during underexcited operation of the generator and to protect from loss-of-filed at light load. A third protective element associated with a third protection zone limits operation of the generator within the generator's specific steady-state stability limits. A fourth protective element is associated with a fourth protection zone to provide an alarm prior to operation of the second protective element. In various embodiments, characteristics and limits of each of the protective elements are defined in the same plane (specifically, the P-Q plane) to simplify settings and allow for visualization of the element characteristics and the generator capability curve at one or more temperatures or cooling capacities.
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公开(公告)号：US10826306B2
公开(公告)日：2020-11-03
申请号：US16131607
申请日：2018-09-14
IPC分类号： F03D17/00 , H02J7/00 , G01R31/36 , F03D7/02 , G01R19/00 , G01R27/26 , H02H1/00 , H02H7/06 , H02J7/34
摘要： A method for monitoring a bank of ultracapacitors configured to power an alternating current (AC) pitch motor of a pitch system in a wind turbine is provided. The method includes obtaining, by one or more control devices, data indicative of a voltage associated with the bank of ultracapacitors. The method includes conducting, by the one or more control devices, a test operation of the bank of ultracapacitors at predetermined intervals of time to determine a capacitance associated with the bank of ultracapacitors. The method further includes performing, by the one or more control devices, one or more control actions based, at least in part, on the capacitance or the data indicative of the voltage.
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公开(公告)号：US10808503B2
公开(公告)日：2020-10-20
申请号：US16074045
申请日：2016-05-04
摘要： The disclosed embodiments include a method to protect a downhole generator from overvoltage. In one embodiment, the method includes determining a speed of an alternator. The method also includes activating overvoltage protection mode if the speed of the alternator is greater than a threshold speed, where activating the overvoltage protection mode includes converting an alternating current measured at the alternator into a first component and a second component of a direct current. Activating the overvoltage protection mode also includes determining a first current threshold based on at least one component of the downhole generator. Activating the overvoltage protection mode also includes shutting down the downhole generator if the first component of the direct current is greater than the first current threshold and decreasing a magnetic flux of the downhole generator if the first component of the direct current is not greater than the first current threshold.
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公开(公告)号：US10658829B2
公开(公告)日：2020-05-19
申请号：US15706941
申请日：2017-09-18
申请人： ABB Schweiz AG
发明人： Tobias Keller , Wolfgang Knapp
IPC分类号： H02H3/00 , H02H1/00 , H02M1/32 , H02P9/10 , H02M7/12 , H02M7/00 , H02M7/145 , H02H3/02 , H02H7/06
摘要： A excitation system and a generator arrangement with the excitation system is proposed. The excitation system comprises a converter adapted for converting an AC current to a DC current, a switching device for short circuiting an AC input of the converter, and an arc detection device for detecting an arc fault in the excitation system and for actuating the switching device upon detecting the arc fault. Therein, the switching device comprises an irreversible switch adapted for short circuiting the AC input such that the arc fault is quenched. This provide a comprehensive protection against arc faults.
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公开(公告)号：US20200091739A1
公开(公告)日：2020-03-19
申请号：US16131607
申请日：2018-09-14
摘要： A method for monitoring a bank of ultracapacitors configured to power an alternating current (AC) pitch motor of a pitch system in a wind turbine is provided. The method includes obtaining, by one or more control devices, data indicative of a voltage associated with the bank of ultracapacitors. The method includes conducting, by the one or more control devices, a test operation of the bank of ultracapacitors at predetermined intervals of time to determine a capacitance associated with the bank of ultracapacitors. The method further includes performing, by the one or more control devices, one or more control actions based, at least in part, on the capacitance or the data indicative of the voltage.
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公开(公告)号：US10511211B1
公开(公告)日：2019-12-17
申请号：US16117108
申请日：2018-08-30
摘要： A trip reduction tool for a wind turbine power system includes a capacitor assembly configured to provide multiple capacitance levels for the power system, including e.g. a first level of capacitance during a learning phase of the tool. The tool also includes one or more processors communicatively coupled to the capacitor assembly that is configured to monitor a plurality of electrical devices of the power system for trips during the learning phase. When a trip is detected, the processor(s) collects data and determines a location of the trip. When the location of the trip is located in an electrical device that corresponds to a weak link of the power system, the processor(s) determines a second level of capacitance for the power system based on the collected data. In addition, the processor(s) provides the second level of capacitance at the weak link of the power system to reduce future trips of the electrical device.
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公开(公告)号：US10475319B2
公开(公告)日：2019-11-12
申请号：US16395171
申请日：2019-04-25
摘要： A generator includes an engine, an air-fuel mixing device coupled to the engine, where the air-fuel mixing device is structured to receive air from an air intake and combine the air with fuel to create an air/fuel mixture, an exhaust outlet positioned on a first side of the generator and coupled to the engine, wherein the exhaust outlet is structured to emit exhaust gases from the engine, and a carbon monoxide (CO) sensor positioned on a second side of the generator opposite the exhaust outlet, where the CO sensor is structured to detect CO concentration near the generator.
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