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公开(公告)号：US11962140B2
公开(公告)日：2024-04-16
申请号：US17452096
申请日：2021-10-25
Applicant: Schweitzer Engineering Laboratories, Inc.
CPC classification number: H02H3/033 , H02H1/0007 , H02H3/08 , H02H3/20
Abstract: The present disclosure relates to systems and methods to coordinate protective elements in an electric power system (EPS). In one embodiment, a system may include a Time vs Normalized Impedance Length subsystem to determine a first plurality of times of operation of a first protective element for a plurality of fault locations in the EPS and to determine a second plurality of times of operation of a second protective element for the plurality of fault locations in the EPS. A protective action subsystem may coordinate a response of the first protective element and the second protective element. The protective action subsystem may establish a pickup and a protective action for the second protective element. Upon detection of a fault in the EPS, one of the first protective action and the second protective action may be implemented based on one of the first pickup and the second pickup.
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2.发明申请公开(公告)号：US20220263310A1
公开(公告)日：2022-08-18
申请号：US17670864
申请日：2022-02-14
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Brett Mitchell Cockerham , Ritwik Chowdhury , John C. Town
Abstract: Systems and methods are described herein to detect an open-phase condition associated with an inverter-based resource for electric power generation within an electric power delivery system. An electric power delivery system may include one or more inverter-based resources that provide three phased electric power to one or more loads of an electric utility. A controller may include circuitry to measure voltage unbalances between different phases, high voltage sequences, phase voltage waveform harmonic distortions, voltage levels, and current levels to dependably detect an open-phase condition of the electric power delivery system.
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3.发明授权公开(公告)号：US11735908B2
公开(公告)日：2023-08-22
申请号：US17670864
申请日：2022-02-14
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Brett Mitchell Cockerham , Ritwik Chowdhury , John C. Town
CPC classification number: H02H7/22 , H02H1/0007 , H02J3/0012
Abstract: Systems and methods are described herein to detect an open-phase condition associated with an inverter-based resource for electric power generation within an electric power delivery system. An electric power delivery system may include one or more inverter-based resources that provide three phased electric power to one or more loads of an electric utility. A controller may include circuitry to measure voltage unbalances between different phases, high voltage sequences, phase voltage waveform harmonic distortions, voltage levels, and current levels to dependably detect an open-phase condition of the electric power delivery system.
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