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公开(公告)号：US11831271B1
公开(公告)日：2023-11-28
申请号：US17836804
申请日：2022-06-09
申请人： ADERIS ENERGY, LLC
CPC分类号： H02P9/08 , H02H9/02 , H02J3/381 , H02J2300/24
摘要： A medium voltage inrush current (MVIC) regulator and interconnection control system for interposing between a distributed power generation facility and a utility grid. The facility has a designated generator step-up (GSU) transformer and is connected to the utility grid at a point of interconnect. The system includes a pre-insertion impedance injection transformer, a low voltage first switch connected between the pre-insertion transformer and secondary coils of the designated GSU transformer, a medium voltage second switch connected inline between the pre-insertion transformer and primary coils of the designated GSU transformer, and a controller. In response to restoration of the utility grid following a loss-of-grid event, the controller opens and closes the first and second switches according to an automated pre-energization switching sequence such that magnetic flux in the designated GSU transformer occurs at a reduced rate, thereby reducing inrush of current and undesirable power quality phenomena.
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公开(公告)号：US11770083B2
公开(公告)日：2023-09-26
申请号：US17285962
申请日：2019-10-22
发明人： Andrew Bloor
IPC分类号： H02P9/30 , H02M7/48 , H01F38/18 , H02P27/08 , H02M3/00 , H02M3/335 , H02P9/08 , H02P9/42 , H02P101/30
CPC分类号： H02P9/302 , H01F38/18 , H02M3/01 , H02M3/33573 , H02M7/4818 , H02P9/08 , H02P9/42 , H02P27/085 , H02P2101/30
摘要： Controlling a DC-AC inverter of an electric machine, where the electric machine comprises a resonant main exciter having rotary transformer. A voltage level of DC power received at a DC-AC inverter is monitored and the frequency of AC power generated by the DC-AC inverter and supplied to the rotary transformer is controlled based at least in part on the voltage level of the DC power.
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公开(公告)号：US11652432B2
公开(公告)日：2023-05-16
申请号：US17527961
申请日：2021-11-16
IPC分类号： H02P9/08 , H02P6/00 , H02P25/06 , H02P3/18 , H02H7/08 , F02B71/04 , H02P9/00 , H02P101/25 , H02K7/18
CPC分类号： H02P9/08 , F02B71/04 , H02H7/08 , H02P3/18 , H02P6/005 , H02P6/006 , H02P9/006 , H02P25/06 , H02K7/1884 , H02P2101/25
摘要： Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.
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公开(公告)号：US11569768B2
公开(公告)日：2023-01-31
申请号：US17353164
申请日：2021-06-21
IPC分类号： H02P7/00 , H02P9/08 , H02P9/00 , H02P9/02 , H02P101/25
摘要： A generator control system is coupled to a motor generator. The system includes a DC port, a first switch unit, a DC bus, a first power conversion circuit, a second power conversion circuit, and a second switch unit. The first power conversion circuit has a first side coupled to the DC bus and a second side coupled to the first switch unit. The second power conversion circuit has a first side coupled to the DC bus and a second side coupled to the motor generator. One end of the second switch unit is coupled to the first power conversion circuit and the first switch unit, and the other end of the second switch unit is coupled to the DC port.
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公开(公告)号：US11557995B2
公开(公告)日：2023-01-17
申请号：US16991077
申请日：2020-08-12
发明人： Gary Collopy
IPC分类号： H02P9/08 , B64D27/02 , B64D27/10 , B64D27/24 , B64D31/06 , B60L50/40 , B60L50/60 , H02P101/30 , H02P101/25
摘要： A hybrid electric propulsion system includes a gas turbine engine having a low speed spool and a high speed spool. The low speed spool includes a low pressure compressor and a low pressure turbine, and the high speed spool includes a high pressure compressor and a high pressure turbine. The hybrid electric propulsion system also includes an energy storage system, an electric motor configured to augment rotational power of the high speed spool, and a controller. The controller is operable to detect a start condition of the gas turbine engine, control power delivery from the energy storage system to the electric motor based on detecting the start condition, and provide a compressor stall margin using a power-assist provided by the electric motor to the high speed spool over a targeted speed range during starting of the gas turbine engine.
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公开(公告)号：US20220173682A1
公开(公告)日：2022-06-02
申请号：US17527961
申请日：2021-11-16
摘要： Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.
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公开(公告)号：US11239769B2
公开(公告)日：2022-02-01
申请号：US16611012
申请日：2017-06-21
摘要： A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. A second controller controls the firing phase of a thyristor in a converter such that DC output current of the converter matches a current command value, based on a detection signal of a position detector. In the first mode, the current command value is set such that the current value is higher as the rotation speed of the synchronous machine is higher.
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公开(公告)号：US11081990B2
公开(公告)日：2021-08-03
申请号：US16645106
申请日：2018-08-21
发明人： Matthias Kowalski , Roland Sievert
摘要： A method for operating a steam turbine, wherein the pressure of the cooling medium in the generator is changed not only for cooling but also for increasing or decreasing the torque of the generator on the steam turbine, this being utilized for the purpose of the start-up or shut-down process.
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公开(公告)号：US20210152109A1
公开(公告)日：2021-05-20
申请号：US16689308
申请日：2019-11-20
发明人： Schwartz Thangyah
摘要： A method for starting a steam turbine can comprise electrically decoupling a generator configured to be driven by the steam turbine from a power supply, controlling power from the power supply to a frequency converter, and operating the generator as a starter motor with power from the frequency converter to turn the steam turbine. A power plant system can comprise a steam turbine, a generator configured to be driven by the steam turbine to supply power to a grid system, a first switch to electrically couple and decouple the generator from the grid system, a frequency converter electrically coupled to the generator, and a second switch to electrically couple and decouple the frequency converter form the grid system.
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公开(公告)号：US20210075350A1
公开(公告)日：2021-03-11
申请号：US17036040
申请日：2020-09-29
摘要： In an example, a control system for controlling a generator and providing an alarm upon detection of a fault condition. The control system includes a control relay, which includes a normally-open (NO) contact pair and a normally-closed (NC) contact pair, between the transfer switch and a controller. The NO contact pair is provided by a NO contact and a common contact, and the NC contact pair is provided by a NC contact and the common contact. The controller can receive signals indicative of a state of the contact pairs of the control relay and, based on the signals, determine whether to activate the generator and/or activate an alarm system.
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