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

IPC: H02H7/26 ,  G01R31/08 ,  G01R19/12 ,  H02H5/10 ,  G01R31/50 ,  G01R31/58

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.

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

IPC: H02H5/10 ,  H02H7/26 ,  G01R31/08 ,  G01R19/12

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.

公开(公告)号：US20190267797A1

公开(公告)日：2019-08-29

申请号：US16411494

申请日：2019-05-14

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Balasubramanian Sridharan ,  Kamal Garg ,  Dennis Haes ,  Hong Chun

IPC: H02H7/26 ,  G01R31/02 ,  G01R31/08 ,  G01R19/12 ,  H02H5/10

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.

公开(公告)号：US09898062B2

公开(公告)日：2018-02-20

申请号：US14444295

申请日：2014-07-28

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Saurabh B. Shah ,  Kamal Garg ,  Scott M. Manson

IPC: G06F11/07 ,  G06F1/30 ,  H02H7/26 ,  H02H7/00 ,  H02H7/06

CPC classification number: G06F1/30 ,  G06F11/0793 ,  H02H7/00 ,  H02H7/062 ,  H02H7/261

Abstract: Various embodiments disclosed herein provide protection to monitored equipment at both a local level and a system level, in order to offer more comprehensive protection. In one particular embodiment, the protected equipment may include one or more generators. The protection system may utilize time-synchronized data in order to analyze data provided by systems having disparate sampling rates, that are monitored by different equipment, and/or equipment that is geographically separated. Various embodiments may be configured to utilize a variety of sampling rates.

公开(公告)号：US20160308349A1

公开(公告)日：2016-10-20

申请号：US15097036

申请日：2016-04-12

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Balasubramanian Sridharan ,  Kamal Garg ,  Dennis Haes ,  Hong Chun

IPC: H02H7/26 ,  G01R19/12 ,  G01R31/08

CPC classification number: H02H7/26 ,  G01R19/12 ,  G01R31/021 ,  G01R31/026 ,  G01R31/083 ,  G01R31/085 ,  H02H5/10

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.

Abstract translation: 可以通过监测导体上各个点处的相电压变化率和/或零序电压变化率来检测电力输送系统断电导体的位置。 可以使用诸如相量测量单元的智能电子设备（IED）来获得测量并计算同步相容器。 中心控制器可以使用同步电极来确定哪两个连续IED测量相反极性的电压变化率，其中断开的导体在两个连续的IED之间。 中心控制器可以使用同步相位器来确定在预定时间内哪个两个连续IED呈现超过预定阈值的零序电压幅度的两个连续IED，其中连续IED中的另一个的零序电压幅度不 超过预定阈值。

公开(公告)号：US20140359351A1

公开(公告)日：2014-12-04

申请号：US14444295

申请日：2014-07-28

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Saurabh B. Shah ,  Kamal Garg ,  Scott M. Manson

IPC: G06F1/30 ,  G06F11/07

CPC classification number: G06F1/30 ,  G06F11/0793 ,  H02H7/00 ,  H02H7/062 ,  H02H7/261

Abstract: Various embodiments disclosed herein provide protection to monitored equipment at both a local level and a system level, in order to offer more comprehensive protection. In one particular embodiment, the protected equipment may include one or more generators. The protection system may utilize time-synchronized data in order to analyze data provided by systems having disparate sampling rates, that are monitored by different equipment, and/or equipment that is geographically separated. Various embodiments may be configured to utilize a variety of sampling rates.

Abstract translation: 为了提供更全面的保护，本文公开的各种实施例在本地级和系统级都提供对被监视设备的保护。 在一个具体实施例中，被保护设备可以包括一个或多个发电机。 保护系统可以利用时间同步的数据来分析由具有不同设备监视的不同采样率的系统和/或地理上分离的设备提供的数据。 各种实施例可以被配置为利用各种采样率。