公开(公告)号：US20190113575A1

公开(公告)日：2019-04-18

申请号：US15783925

申请日：2017-10-13

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Dale S. Finney ,  Normann Fischer ,  Derrick Haas

IPC: G01R31/34 ,  H01H47/00

Abstract: The present disclosure relates to systems and methods for detecting transient high-torque events associated with rotating machinery in an electric power system. In one embodiment, a relay may comprise an electrical parameters module configured to receive a representation of a voltage and a current at a terminal of rotating machinery in an electric power system. A torque calculation module may be configured to continuously determine a calculated torque value for the rotating machinery using the representation of the voltage and the current at the terminal of the rotating machinery; and to compare each calculated torque value to a threshold. An action module may be configured to generate an alarm when the calculated torque value exceeds the threshold. A log module may be configured to generate a log comprising a peak of the calculated torque value and a time at which the peak torque value occurs.

公开(公告)号：US09128140B2

公开(公告)日：2015-09-08

申请号：US14477495

申请日：2014-09-04

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Normann Fischer ,  Amandeep Singh Kalra

IPC: G01R31/14 ,  G01R31/02 ,  G01R31/08 ,  H02H3/16

CPC classification number: G01R31/08 ,  G01R31/085 ,  G01R31/086 ,  G01R31/088 ,  H02H3/165 ,  Y04S10/522

Abstract: Detection of a fault in an ungrounded electric power distribution system that includes a plurality of feeders and buses is disclosed herein. Embodiments consistent with the present disclosure may monitor an electrical parameter associated with each of a plurality of feeders and buses in the ungrounded electric power distribution system. An incremental change in the monitored electrical parameters may be determined using the monitored electrical parameter. Further, the incremental change may be associated with a first sub-set of the plurality of feeders. Torque values for the feeders may be calculated using a reference quantity from the bus first exhibiting an incremental change above a threshold. A feeder having the largest incremental change in the first sub-set of the plurality of feeders may be identified. A fault may be identified based on the torque and the incremental change.

Abstract translation: 本文公开了包括多个馈线和总线的未接地配电系统中的故障的检测。 与本公开一致的实施例可以监测与未接地电力分配系统中的多个馈线和总线中的每一个相关联的电参数。 可以使用所监视的电参数来确定所监视的电参数的增量变化。 此外，增量变化可以与多个馈送器的第一子集相关联。 可以使用来自总线的参考数量来计算进给器的扭矩值，其中显示出高于阈值的增量变化。 可以识别在多个馈送器的第一子集中具有最大增量变化的馈线。 可以基于扭矩和增量变化来识别故障。