公开(公告)号：US20250132599A1

公开(公告)日：2025-04-24

申请号：US18490145

申请日：2023-10-19

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Normann Fischer ,  Douglas I. Taylor ,  Ritwik Chowdhury

IPC: H02J13/00 ,  H02H1/00

Abstract: The present application relates to generating adaptive protective relay event reports. In one embodiment, a system comprises a power system response subsystem to monitor electrical parameters in an electric power system and to receive a trigger signal from a trigger source based on identification of an event in an electric power system. An adaptive event report subsystem is configured to generate an adaptive report depending on the trigger related to the event and based on a pre-trigger start, a duration, and a sampling rate. The adaptive event report comprises at least one electrical parameter related to the event beginning at a time established by the pre-trigger start, covering an interval established by the duration, and recorded at the sampling rate.

公开(公告)号：US10288688B2

公开(公告)日：2019-05-14

申请号：US14807339

申请日：2015-07-23

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Bogdan Z. Kasztenny ,  Normann Fischer ,  Dale S. Finney ,  Douglas I. Taylor

IPC: G01R31/34 ,  H02H7/06 ,  H02H3/08

Abstract: Protection of an electrical generator includes determining a rotor and stator components using rotor and stator electrical signals, calculating a unbalance and/or differential component using the stator and rotor components, and determining a stator or rotor fault based on the unbalance and/or differential component. Further, the faulted phase and/or zone of a stator fault may be determined using the stator positive sequence voltage and negative sequence current.

公开(公告)号：US20240097449A1

公开(公告)日：2024-03-21

申请号：US18459691

申请日：2023-09-01

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Ritwik Chowdhury ,  Douglas I. Taylor ,  Normann Fischer

IPC: H02J3/24 ,  H02H7/22 ,  H02J3/00 ,  H02J3/01

CPC classification number: H02J3/241 ,  H02H7/226 ,  H02J3/0012 ,  H02J3/00125 ,  H02J3/01

Abstract: The present application discloses systems and methods related to protection of a reactor in an alternating current (AC) electric power system. In one embodiment, a system may include a protective action subsystem to implement a protective action based on identification of a fault condition associated with a reactor. A frequency determination subsystem may determine when a frequency of the AC voltage is outside of a range defined by a lower threshold and an upper threshold and may identify a change in the frequency associated with de-energization of a line in electrical communication with the reactor. A supervisory subsystem may restrain implementation of the protective action when the frequency is outside of the range or when the change in the frequency is associated with de-energization of the line in electrical communication with the reactor.

公开(公告)号：US20150043108A1

公开(公告)日：2015-02-12

申请号：US14524879

申请日：2014-10-27

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Douglas I. Taylor

IPC: H02H7/04

CPC classification number: H02H7/04 ,  H02H9/002 ,  Y10T307/826

Abstract: A system for reducing inrush current in a three phase utility transformer upon energization of the transformer by an applied three phase voltage utilizes a pre-flux circuit for establishing residual flux levels in the core segments of the primary windings of the transformer which are near the prospective flux levels established in the core segments by the applied voltage. The pre-flux circuit includes a pre-fluxing capacitor which, after being charged to a predetermined voltage level, is discharged serially through two of the primary windings to establish the predetermined flux levels in the core segments of the two windings, and a reduced flux level in the core segment of the remaining primary winding. The transformer is energized at the instant of positively-referenced peak phase voltage to the third primary winding such that prospective and residual flux approach a near-equal level in all three core segments and inrush current is reduced. The method may be applied to the secondary or tertiary windings instead of the primary windings. Additionally, an alternative method allows application of the pre-fluxing circuit to a delta-connected set of transformer windings.

Abstract translation: 一种用于在通过施加的三相电压通电变压器的情况下降低三相公用变压器中的浪涌电流的系统利用预通量电路来建立变压器初级绕组的铁芯段中的残余磁通量级，其中接近预期 通过施加的电压在芯段中建立的通量水平。 预通量电路包括预充电电容器，其在被充电到预定电压电平之后，串联地通过两个初级绕组放电，以在两个绕组的芯段中建立预定的磁通量，并且减小通量 剩余初级绕组的核心段的水平。 变压器在正相参考的峰值相电压瞬间通电到第三个初级绕组，使得预期和剩余通量在所有三个核心段中达到近似相等的水平，并降低涌流。 该方法可以应用于次级或三级绕组而不是初级绕组。 此外，另一种方法允许将预通量电路应用于三角形连接的变压器绕组组。

公开(公告)号：US12176716B2

公开(公告)日：2024-12-24

申请号：US18459691

申请日：2023-09-01

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Ritwik Chowdhury ,  Douglas I. Taylor ,  Normann Fischer

IPC: H02J3/24 ,  H02H7/22 ,  H02J3/00 ,  H02J3/01

Abstract: The present application discloses systems and methods related to protection of a reactor in an alternating current (AC) electric power system. In one embodiment, a system may include a protective action subsystem to implement a protective action based on identification of a fault condition associated with a reactor. A frequency determination subsystem may determine when a frequency of the AC voltage is outside of a range defined by a lower threshold and an upper threshold and may identify a change in the frequency associated with de-energization of a line in electrical communication with the reactor. A supervisory subsystem may restrain implementation of the protective action when the frequency is outside of the range or when the change in the frequency is associated with de-energization of the line in electrical communication with the reactor.

公开(公告)号：US20170054495A1

公开(公告)日：2017-02-23

申请号：US15342013

申请日：2016-11-02

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Bogdan Z. Kasztenny ,  Douglas I. Taylor

IPC: H04B10/032 ,  H02H7/26

CPC classification number: H04B10/032 ,  H02H7/265 ,  H04B10/0791

Abstract: Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire. Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.

Abstract translation: 本文公开了一种使用光接地线中的偏振态行波来检测电力传输线路上的故障位置的系统。 各种实施例还可以检测传输系统的导体上的行波。 可以比较极化状态行波和电行波的到达时间。 使用时差和已知的行波传播速度，可以计算与故障的距离。 偏光状态行波的到达时间可以使用来自具有偏振滤光器的光学通道中的光电检测器的电信号在不同取向或参考框架下计算。

公开(公告)号：US20160025811A1

公开(公告)日：2016-01-28

申请号：US14807339

申请日：2015-07-23

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Bogdan Z. Kasztenny ,  Normann Fischer ,  Dale S. Finney ,  Douglas I. Taylor

IPC: G01R31/34 ,  H02H7/06

CPC classification number: G01R31/343 ,  H02H3/083 ,  H02H7/06

Abstract: Protection of an electrical generator includes determining a rotor and stator components using rotor and stator electrical signals, calculating a unbalance and/or differential component using the stator and rotor components, and determining a stator or rotor fault based on the unbalance and/or differential component. Further, the faulted phase and/or zone of a stator fault may be determined using the stator positive sequence voltage and negative sequence current.

Abstract translation: 发电机的保护包括使用转子和定子电信号确定转子和定子部件，使用定子和转子部件计算不平衡和/或差动部件，以及基于不平衡和/或差动部件确定定子或转子故障 。 此外，可以使用定子正序电压和负序电流来确定定子故障的故障相位和/或区域。

公开(公告)号：US09774388B2

公开(公告)日：2017-09-26

申请号：US15342013

申请日：2016-11-02

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Bogdan Z. Kasztenny ,  Douglas I. Taylor

IPC: H04B10/032 ,  H02H7/26 ,  H04B10/079

CPC classification number: H04B10/032 ,  H02H7/265 ,  H04B10/0791

Abstract: Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire. Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.

公开(公告)号：US09509399B2

公开(公告)日：2016-11-29

申请号：US15041578

申请日：2016-02-11

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Bogdan Z. Kasztenny ,  Douglas I. Taylor

IPC: H04B10/079

CPC classification number: H04B10/032 ,  H02H7/265 ,  H04B10/0791

Abstract: Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.

Abstract translation: 这里公开了使用光接地线中的偏振态行波来检测电力传输线上的故障位置的系统。各种实施例还可以检测传输系统的导体上的行波。 可以比较极化状态行波和电行波的到达时间。 使用时差和已知的行波传播速度，可以计算与故障的距离。 偏光状态行波的到达时间可以使用来自具有偏振滤光器的光学通道中的光电检测器的电信号在不同取向或参考框架下计算。

公开(公告)号：US20160241336A1

公开(公告)日：2016-08-18

申请号：US15041578

申请日：2016-02-11

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Bogdan Z. Kasztenny ,  Douglas I. Taylor

IPC: H04B10/079

CPC classification number: H04B10/032 ,  H02H7/265 ,  H04B10/0791

Abstract: Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.

Abstract translation: 这里公开了使用光接地线中的偏振态行波来检测电力传输线上的故障位置的系统。各种实施例还可以检测传输系统的导体上的行波。 可以比较极化状态行波和电行波的到达时间。 使用时差和已知的行波传播速度，可以计算与故障的距离。 偏光状态行波的到达时间可以使用来自具有偏振滤光器的光学通道中的光电检测器的电信号在不同取向或参考框架下计算。