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公开(公告)号：US20240356338A1
公开(公告)日：2024-10-24
申请号：US18761432
申请日：2024-07-02
Applicant: ABB SCHWEIZ AG
Inventor： Sridhar Pulikanti , Simon Walton , Robert Turner , Nick Elliott
Abstract: A method of regulating frequency of plurality of uninterruptible power supply units and corresponding uninterruptible power supply (UPS) unit. The method includes broadcasting, to a controller of a UPS unit, an expected synchronization direction to other UPS units via a communication link, the expected synchronization direction being determined based on a frequency of the corresponding UPS units and a frequency of a grid. The method includes obtaining the expected synchronization directions of other UPS units via the communication link; determining a major synchronization direction based on the expected synchronization direction of each UPS unit; and regulating a frequency of each UPS unit based on the major synchronization direction.
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公开(公告)号：US12027862B1
公开(公告)日：2024-07-02
申请号：US17976787
申请日：2022-10-29
Applicant: J. Carl Cooper
Inventor： J. Carl Cooper
Abstract: A method and apparatus is described for conveying the amount of loading of a power source to a load control device by controlling the frequency of the AC power output from that power source in a manner that controlled frequency represents the loading. At a different location in the power system, the frequency is measured and the corresponding loading of the power source is used to prevent or alleviate a power source overload.
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公开(公告)号：US11984909B2
公开(公告)日：2024-05-14
申请号：US17690008
申请日：2022-03-09
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kojiro Asakawa , Kazuhito Hayashi , Ikuhiro Nakamura
Abstract: A system of an interconnected inverter includes an inverter that converts DC power from a DC power supply into AC power and provides AC power to an AC power line, an RDC that converts a voltage value obtained by a voltage sensor into electrical angle information that shows a phase angle of an output voltage, the voltage sensor obtaining a voltage value of an output voltage from the inverter to a power grid, and an ECU that controls the inverter to provide an alternating current in synchronization with an alternating current that flows through the AC power line by using timing at which an angle shown in the electrical angle information given from the RDC attains to a prescribed angle. Extra cost for diversion can be reduced.
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公开(公告)号：US20240146070A1
公开(公告)日：2024-05-02
申请号：US18386785
申请日：2023-11-03
Applicant: Navia Energy Inc.
Inventor： Babu Jain
Abstract: An energy system substantially converts the power input into an AC power signal that is substantially synchronized with a power signal of the power grid. The energy system is further operable in alternative modes, including in an on-grid mode and off-grid mode. In the on-grid mode, the energy system provides the synchronized AC power signal to the power grid. In the off-grid mode, the energy delivers at least a portion of the AC power signal to a grid load.
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公开(公告)号：US20240072698A1
公开(公告)日：2024-02-29
申请号：US17895476
申请日：2022-08-25
Applicant: General Electric Renovables Espana, S.L.
Inventor： Rupam Basak , Arvind Kumar Tiwari , Veena Padmarao , Rabisankar Roy
CPC classification number: H02P9/007 , H02J3/381 , H02J3/40 , H02J2300/28 , H02P2101/15
Abstract: A method and associated system provide grid-forming mode (GFM) control of an inverter-based renewable energy source having an asynchronous machine connected to a power grid. The method includes deriving a power error signal (PER) between a real power output (PB) from the renewable energy source and a power reference (PREF) representing a desired power output of the renewable energy source. With an inertial power regulator, a phase shift angle (δIT) is generated from the power error signal (PER) to provide virtual synchronous machine (VSM) control functionality to the GFM control of the renewable energy source. A power angle compensation (Δδ) is applied to the phase shift angle (δIT) from the inertial power regulator to dampen power oscillations and load fluctuations during transient power events.
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Patent Agency Ranking
公开(公告)号：US11843252B2
公开(公告)日：2023-12-12
申请号：US17538003
申请日：2021-11-30
Applicant: General Electric Company
Inventor： Dustin Howard
IPC: H02J3/38 , H02J3/24 , H02J3/46 , H02J3/40 , H02P9/00 , F03D9/25 , F03D7/02 , H02M5/458 , H02P101/15
CPC classification number: H02J3/381 , F03D7/0284 , F03D9/257 , H02J3/241 , H02J3/40 , H02J3/46 , H02M5/4585 , H02P9/007 , F05B2270/335 , F05B2270/337 , H02J2300/28 , H02P2101/15
Abstract: A method for damping sub-synchronous control interactions (SSCI) in a grid-forming inverter-based resource connected to an electrical grid includes receiving, via a controller, a current feedback signal in a synchronous reference frame. The method also includes rotating, via the controller, the current feedback signal to a new reference frame associated with a sub-synchronous frequency range. Further, the method includes determining, via the controller, a sub-synchronous component of the current feedback signal. Moreover, the method includes rotating, via the controller, the sub-synchronous component of the current feedback signal back to the synchronous reference frame. In addition, the method includes determining, via the controller, a voltage command associated with sub-synchronous damping for the inverter-based resource as a function of the sub-synchronous component and a virtual resistance setting. Thus, the method includes controlling, via the controller, the inverter-based resource, based at least in part, on the voltage command associated with the sub-synchronous damping.
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公开(公告)号：US20230387692A1
公开(公告)日：2023-11-30
申请号：US18031627
申请日：2020-11-06
Applicant: Mitsubishi Electric Corporation
Inventor： Sadayuki INOUE
CPC classification number: H02J3/381 , H02J3/40 , H02J2300/24 , H02J2203/20
Abstract: A control circuit includes a virtual synchronous generator control circuit to impart a transient characteristic of a synchronous generator to the inverter, a control parameter generating circuit to generate a control parameter for controlling the virtual synchronous generator control circuit, an inverter voltage control circuit to control the inverter as a voltage source, based on AC system voltage information input from the virtual synchronous generator control circuit, and a communication circuit to receive, from a management device that manages the distributed power source, a power target value of the distributed power source and information necessary for generating the control parameter. The control parameter generating circuit generates at least one of a speed adjustment rate and a damping coefficient to be used in the virtual synchronous generator control circuit, based on the power target value and the information necessary for generating the control parameter received by the communication circuit.
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公开(公告)号：US20230327459A1
公开(公告)日：2023-10-12
申请号：US17956554
申请日：2022-09-29
Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
Inventor： James E. Widen, Jr. , Brian P. Brown
CPC classification number: H02J3/40 , H02J3/381 , H02J13/00016 , H04L7/0075
Abstract: A power supply circuit for use with a power supply system. The power supply circuit can be provided within a power supply module connected with one or more additional power supply modules as part of the power supply system. The power supply circuit includes an optocoupler and a resistor ladder connected to the optocoupler. The circuit asserts a synchronization signal responsive to the optocoupler being energized.
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9.发明公开公开(公告)号：US20230170705A1
公开(公告)日：2023-06-01
申请号：US17538003
申请日：2021-11-30
Applicant: General Electric Company
Inventor： Dustin Howard
CPC classification number: H02J3/381 , H02J3/241 , H02J3/46 , H02J3/40 , H02P9/007 , F03D9/257 , F03D7/0284 , H02M5/4585 , H02J2300/28 , H02P2101/15
Abstract: A method for damping sub-synchronous control interactions (SSCI) in a grid-forming inverter-based resource connected to an electrical grid includes receiving, via a controller, a current feedback signal in a synchronous reference frame. The method also includes rotating, via the controller, the current feedback signal to a new reference frame associated with a sub-synchronous frequency range. Further, the method includes determining, via the controller, a sub-synchronous component of the current feedback signal. Moreover, the method includes rotating, via the controller, the sub-synchronous component of the current feedback signal back to the synchronous reference frame. In addition, the method includes determining, via the controller, a voltage command associated with sub-synchronous damping for the inverter-based resource as a function of the sub-synchronous component and a virtual resistance setting. Thus, the method includes controlling, via the controller, the inverter-based resource, based at least in part, on the voltage command associated with the sub-synchronous damping.
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公开(公告)号：US20180267085A1
公开(公告)日：2018-09-20
申请号：US15982469
申请日：2018-05-17
Applicant: ABB Schweiz AG
Inventor： Peter Al-Hokayem
CPC classification number: G01R19/2503 , G01R19/0007 , G01R19/2509 , G01R19/2513 , G01R23/02 , G01R23/20 , G01R25/00 , H02J3/40 , H02M1/00 , H02M1/082 , H02M5/4585 , H02M7/12 , H02M2001/0025
Abstract: A method for estimating a fundamental component of an AC voltage includes receiving a timely varying measurement signal of the AC voltage; parametrizing a fundamental component of the AC voltage; and determining parameters of the fundamental component based on minimizing a cost function. The fundamental component has a rated frequency, a variable amplitude and a variable phase shift. The cost function is based on an integral of a norm of a difference between the measurement signal and the parametrized fundamental component via a time horizon. The time horizon starts at an actual time point and goes back via a predefined length. The cost function includes a term based on a norm of the difference between a value of the fundamental component at the actual time point and a value of a previously estimated fundamental component at the actual time point, where the previously estimated fundamental component has been determined for a previous time point.
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