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公开(公告)号：US20190252134A1
公开(公告)日：2019-08-15
申请号：US15896209
申请日：2018-02-14
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Dennis Haes
IPC: H01H9/56 , G05B19/042
CPC classification number: H01H9/563 , G05B19/0428 , G05B2219/21155 , G05B2219/24015
Abstract: An intelligent electronic device (IED) may provide point on wave switching. The IED may receive a control operation request, and determine when to issue a control command to cause a switch to change positions. The actuation of the switch may occur at a target point on an alternating current. An IED may have a processor that is too slow to implement a switch when a desired point on an alternating current first occurs. Accordingly, some embodiments may compensate for the processing speed of an IED by determining a number of processor cycles needed (in advance) to issue a control command so that the resulting action results in the desired point on wave open or close.
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公开(公告)号：US11630424B2
公开(公告)日：2023-04-18
申请号：US16510222
申请日：2019-07-12
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Michael B Bryson , Dennis Haes
Abstract: Systems and methods are provided for monitoring or protecting an electric power distribution system using protective devices that may rely on accurate time signals from a common time source. A first protective device may receive a first time signal deriving from the common time source and a second protective device may receive a second time signal deriving from the common time source. The first time signal and the second time signal may be compared; when a difference between them exceeds a defined threshold, time signal manipulation may be detected. The protective devices may modify their operation in response to or to account for the time signal manipulation.
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公开(公告)号：US20200018861A1
公开(公告)日：2020-01-16
申请号：US16510222
申请日：2019-07-12
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Michael B. Bryson , Dennis Haes
Abstract: Systems and methods are provided for monitoring or protecting an electric power distribution system using protective devices that may rely on accurate time signals from a common time source. A first protective device may receive a first time signal deriving from the common time source and a second protective device may receive a second time signal deriving from the common time source. The first time signal and the second time signal may be compared; when a difference between them exceeds a defined threshold, time signal manipulation may be detected. The protective devices may modify their operation in response to or to account for the time signal manipulation.
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公开(公告)号：US10340684B2
公开(公告)日：2019-07-02
申请号：US15097036
申请日：2016-04-12
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Balasubramanian Sridharan , Kamal Garg , Dennis Haes , Hong Chun
Abstract: A location of a broken electrical conductor of an electric power delivery system may be detected by monitoring a rate of change of phase voltage and/or a rate of change of zero-sequence voltage at various points on the conductor. Intelligent electronic devices (IEDs) such as phasor measurement units may be used to obtain measurements and calculate synchrophasors. The synchrophasors may be used by a central controller to determine which two continuous IEDs measure rates of change of voltages of opposite polarities, where the broken conductor is between the two continuous IEDs. The synchrophasors may be used by a central controller to determine which two continuous IEDs where one exhibits a zero-sequence voltage magnitude that exceeds a predetermined threshold for a predetermined time, wherein the zero-sequence voltage magnitude of the other of the continuous IEDs does not exceed the predetermined threshold.
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公开(公告)号：US20140371929A1
公开(公告)日：2014-12-18
申请号：US13919487
申请日：2013-06-17
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： William F. Allen , Dennis Haes
IPC: G05B15/02
CPC classification number: H04Q9/00 , G01R19/2513 , H02J3/00 , H02J3/14 , H02J3/16 , H02J3/18 , H02J3/1821 , H02J13/0079 , H02J2003/007 , H04Q2209/30 , Y02E40/34 , Y02E40/74 , Y02E60/724 , Y02E60/728 , Y02E60/76 , Y04S10/18 , Y04S10/22 , Y04S10/265 , Y04S40/22
Abstract: Disclosed herein are a variety of systems and methods for estimating a source impedance value. One embodiment may include an intelligent electronic device (IED) configured to interface with an electric power distribution system. The IED may include a communications interface, a processor, and a non-transitory computer-readable storage medium. The computer-readable storage medium may include software instructions executable on the processor that enable the IED to identify a source impedance modeling event at a node in the power distribution system. The software instructions may further enable the IED to receive a plurality of measurements representing an electrical condition at the node prior to the source impedance modeling event and subsequent to the source impedance modeling event. The IED may calculate a source impedance value based on the first plurality of measurements at the node. Based on the source impedance value, a control action may be generated.
Abstract translation: 这里公开了用于估计源阻抗值的各种系统和方法。 一个实施例可以包括被配置为与配电系统接口的智能电子设备（IED）。 IED可以包括通信接口，处理器和非暂时的计算机可读存储介质。 计算机可读存储介质可以包括可在处理器上执行的软件指令，其使IED能够在配电系统中的节点处识别源阻抗建模事件。 软件指令还可以使IED能够在源阻抗建模事件之前和源阻抗建模事件之后接收代表节点处的电气状况的多个测量值。 IED可以基于节点处的第一多个测量来计算源阻抗值。 基于源阻抗值，可以产生控制动作。
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Patent Agency Ranking
公开(公告)号：US11112815B1
公开(公告)日：2021-09-07
申请号：US16833955
申请日：2020-03-30
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Austin Edward Wade , Dennis Haes
Abstract: Systems and methods to isolate faults and restore power are described herein. For example, an intelligent electronic device (IED) may receive a blocking signal indicating a fault is detected on a power line. The IED may obtain one or more current measurements of the power line. The IED may determine that a fault is not present on the power line at the IED based on the one or more current measurements. The IED may trip a first current interruption device of the IED The IED may send a close permissive signal to another IED indicating that the other IED is permitted to permitted to close an open current interruption device of the other IED to restore power to one or more loads.
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公开(公告)号：US10910826B2
公开(公告)日：2021-02-02
申请号：US16411494
申请日：2019-05-14
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Balasubramanian Sridharan , Kamal Garg , Dennis Haes , Hong Chun
Abstract: A location of a broken electrical conductor of an electric power delivery system may be detected by monitoring a rate of change of phase voltage and/or a rate of change of zero-sequence voltage at various points on the conductor. Intelligent electronic devices (IEDs) such as phasor measurement units may be used to obtain measurements and calculate synchrophasors. The synchrophasors may be used by a central controller to determine which two continuous IEDs measure rates of change of voltages of opposite polarities, where the broken conductor is between the two continuous IEDs. The synchrophasors may be used by a central controller to determine which two continuous IEDs where one exhibits a zero-sequence voltage magnitude that exceeds a predetermined threshold for a predetermined time, wherein the zero-sequence voltage magnitude of the other of the continuous IEDs does not exceed the predetermined threshold.
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公开(公告)号：US10474142B2
公开(公告)日：2019-11-12
申请号：US15718145
申请日：2017-09-28
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Dennis Haes , Normann Fischer
Abstract: Disclosed herein are a variety of systems and methods related to detection of a cross-country fault in an electrical power system. In one embodiment, a system consistent with the present disclosure may be configured to monitor electrical parameters in the electrical power system. The system may determine when a voltage magnitude of one phase exceeds a first voltage threshold. The one phase that exceeds the first voltage threshold may be identified as an un-faulted phase. The system may further be configured to determine that the voltage magnitude of the un-faulted phase exceeds a second threshold based on a zero-sequence voltage. The system may further be configured to determine that a phase angle between the un-faulted phase and the zero-sequence voltage is within a range. A protective action to clear the cross-country fault condition may be implemented upon identification of a cross-country fault.
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公开(公告)号：US10418201B2
公开(公告)日：2019-09-17
申请号：US15896209
申请日：2018-02-14
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Dennis Haes
IPC: H01H9/56 , G05B19/042
Abstract: An intelligent electronic device (IED) may provide point on wave switching. The IED may receive a control operation request, and determine when to issue a control command to cause a switch to change positions. The actuation of the switch may occur at a target point on an alternating current. An IED may have a processor that is too slow to implement a switch when a desired point on an alternating current first occurs. Accordingly, some embodiments may compensate for the processing speed of an IED by determining a number of processor cycles needed (in advance) to issue a control command so that the resulting action results in the desired point on wave open or close.
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公开(公告)号：US20190094845A1
公开(公告)日：2019-03-28
申请号：US15718145
申请日：2017-09-28
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Dennis Haes , Normann Fischer
Abstract: Disclosed herein are a variety of systems and methods related to detection of a cross-country fault in an electrical power system. In one embodiment, a system consistent with the present disclosure may be configured to monitor electrical parameters in the electrical power system. The system may determine when a voltage magnitude of one phase exceeds a first voltage threshold. The one phase that exceeds the first voltage threshold may be identified as an un-faulted phase. The system may further be configured to determine that the voltage magnitude of the un-faulted phase exceeds a second threshold based on a zero-sequence voltage. The system may further be configured to determine that a phase angle between the un-faulted phase and the zero-sequence voltage is within a range. A protective action to clear the cross-country fault condition may be implemented upon identification of a cross-country fault.
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