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公开(公告)号：US20230261517A1
公开(公告)日：2023-08-17
申请号：US18002620
申请日：2020-07-13
Applicant: ABB Schweiz AG
Inventor： Sridhar Pulikanti , Simon Walton , Mathias Brand , Dustin Murdock , Robert Turner , Nicholas James Elliott
Abstract: Embodiments of the present disclosure relate to an uninterruptible power supply. The uninterruptible power supply comprises a switch, a power management module, an inverter and a controller. The switch is arranged between a load and a power source, the power source configured to supply power to the load. The power management module comprises a main energy storage and configured to reduce a ripple experienced by the main energy storage. The inverter is arranged between and coupled to the power management module and the load. The controller is coupled to the power management module, the inverter and the switch, the controller configured to control the inverter to regulate output voltage magnitude and frequency by regulating the power exchange between the inverter and the power source. According to embodiments of the present disclosure, the overcharging of the energy storage during sudden load rejections or utility phase jumps can be avoided.
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公开(公告)号：US20230018100A1
公开(公告)日：2023-01-19
申请号：US17757581
申请日：2019-12-27
Applicant: ABB Schweiz AG
Inventor： Sridhar Pulikanti , Simon Walton , Robert Turner , Nicholas James Elliott
Abstract: Embodiments of the present disclosure relate to method and apparatus for detecting grid islanding in a grid supporting voltage source converter. The method includes modulating an output voltage at an output of the grid supporting voltage source converter; determining at least one grid parameter at an input to the grid supporting voltage source converter; and detecting the grid islanding for the grid supporting voltage source converter based on the at least one grid parameter.
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公开(公告)号：US12009693B2
公开(公告)日：2024-06-11
申请号：US17758553
申请日：2020-01-09
Applicant: ABB Schweiz AG
Inventor： Sridhar Pulikanti , Simon Walton , Robert Turner , Nicholas James Elliott
Abstract: Embodiments of present disclosure relate to apparatus and method for flux management in the ZISC based UPS system. The apparatus comprises: a first determining unit configured to determine a first offset flux on a series reactor in the ZISC based UPS system when power quality events occur in a grid connected to the ZISC based UPS system and the ZISC based UPS system operates in a grid-connected mode; and a first resetting unit configured to provide synthetic impedance damping to the series reactor to reset the first offset flux.
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公开(公告)号：US20230208316A1
公开(公告)日：2023-06-29
申请号：US17905057
申请日：2020-02-27
Applicant: ABB Schweiz AG
Inventor： Robert Turner , Simon Walton , Sridhar Pulikanti , Arnoud Gerlof Van Der Wal , Ian Murray Porteous , Nicholas James Elliott
IPC: H02M7/493
CPC classification number: H02M7/493
Abstract: Embodiments of the present disclosure relate to parallel 3-level inverter without midpoint connection. The parallel 3-level inverter includes a plurality of parallel converters coupled in parallel between a common DC bus and a common AC output, wherein each of the plurality of parallel converters comprises a midpoint and the midpoints of the plurality of parallel converters are disconnected from each other.
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公开(公告)号：US10707696B2
公开(公告)日：2020-07-07
申请号：US15856867
申请日：2017-12-28
Applicant: ABB Schweiz AG
Inventor： Sridhar Pulikanti , Simon James Walton , Robert Turner , NIck Elliott
Abstract: The present invention provides a method for operation of an offline uninterrupted power supplyfor providing power to a load in case of failure of a power source, the uninterrupted power supply comprising at least one disconnect switch, which is arranged between the power source and the load, at least one energy storage, at least one power converter, which is arranged between the at least one energy storage and the load at a load side of the disconnect switch, and a control device for controlling the at least one power converter to provide power from the at least one energy storage to the load in case of failure of the power source, comprising the steps of identifying a power quality event, differentiating the identified power quality events to separate load side events from power supply side quality events, and upon identification of a power supply side power quality event from an identified power quality event, providing power from the at least one energy storage to the load. The present invention also provides a offline uninterrupted power supply, in particular a medium-voltage uninterrupted power supply, to perform the above method.
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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：US10305274B2
公开(公告)日：2019-05-28
申请号：US15489203
申请日：2017-04-17
Applicant: ABB Schweiz AG
Inventor： Robert Turner
IPC: H02M1/36 , H02H9/00 , H02M1/40 , H02H9/04 , H02M1/42 , H02M5/22 , H02M7/12 , H02M7/48 , H02H7/045 , H02M5/12 , H02M7/483
Abstract: The present invention is concerned with pre-magnetizing a Modular Multilevel power Converters connected transformer in order to moderate inrush currents upon connecting the transformer to an electric grid. The invention takes advantage of the high amount of stored energy in MMC converters as compared to other converter types. This stored energy is used to pre-magnetize the converter-connected transformer, therefore no additional or dedicated pre-magnetizing hardware is required in addition to the charging hardware provided to charge the converter capacitors. As the transformer pre-magnetizing takes place subsequent to the converter charging, the converter charging circuit is not used to, and therefore does not need to be designed to, directly magnetize the transformer.
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公开(公告)号：US20180145538A1
公开(公告)日：2018-05-24
申请号：US15856867
申请日：2017-12-28
Applicant: ABB Schweiz AG
Inventor： Sridhar Pulikanti , Simon James Walton , Robert Turner , Nick Elliott
IPC: H02J9/06
Abstract: The present invention provides a method for operation of an offline uninterrupted power supply (100), in particular a medium-voltage uninterrupted power supply, for providing power to a load in case of failure of a power source, the uninterrupted power supply (100) comprising at least one disconnect switch (112), which is arranged between the power source and the load, at least one energy storage (114), at least one power converter (116), which is arranged between the at least one energy storage (114) and the load at a load side of the disconnect switch (112), and a control device (120) for controlling the at least one power converter (116) to provide power from the at least one energy storage (114) to the load in case of failure of the power source, comprising the steps of identifying a power quality event, differentiating the identified power quality events to separate load side events from power supply side quality events, and upon identification of a power supply side power quality event from an identified power quality event, providing power from the at least one energy storage (114) to the load. The present invention also provides a offline uninterrupted power supply (100), in particular a medium-voltage uninterrupted power supply, to perform the above method.
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公开(公告)号：US12095272B2
公开(公告)日：2024-09-17
申请号：US17757581
申请日：2019-12-27
Applicant: ABB Schweiz AG
Inventor： Sridhar Pulikanti , Simon Walton , Robert Turner , Nicholas James Elliott
Abstract: Embodiments of the present disclosure relate to method and apparatus for detecting grid islanding in a grid supporting voltage source converter. The method includes modulating an output voltage at an output of the grid supporting voltage source converter; determining at least one grid parameter at an input to the grid supporting voltage source converter; and detecting the grid islanding for the grid supporting voltage source converter based on the at least one grid parameter.
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公开(公告)号：US12015355B2
公开(公告)日：2024-06-18
申请号：US17905057
申请日：2020-02-27
Applicant: ABB Schweiz AG
Inventor： Robert Turner , Simon Walton , Sridhar Pulikanti , Arnoud Gerlof Van Der Wal , Ian Murray Porteous , Nicholas James Elliott
Abstract: Embodiments of the present disclosure relate to parallel 3-level inverter without midpoint connection. The parallel 3-level inverter includes a plurality of parallel converters coupled in parallel between a common DC bus and a common AC output, wherein each of the plurality of parallel converters comprises a midpoint and the midpoints of the plurality of parallel converters are disconnected from each other.
