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公开(公告)号：US10445161B2
公开(公告)日：2019-10-15
申请号：US15056319
申请日：2016-02-29
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Carl V. Mattoon , Travis L. Mooney
Abstract: The present disclosure pertains correcting linear interpolation errors. In one embodiment, a system comprises an input configured to receive the periodic signal at a first sampling rate and an output configured to provide an interpolated representation of the periodic signal at a second sampling rate. A linear interpolation subsystem may establish a ratio between the first sampling rate and the second sampling rate to determine a slip frequency. The linear interpolation subsystem creates an interpolated representation of the periodic signal based on the ratio. The interpolated representation of the periodic signal includes a deterministic error attributable to interpolation. A linear interpolation correction subsystem may correct the deterministic error attributable to the linear interpolation subsystem and create a corrected interpolated representation. An application interface subsystem may provide the corrected interpolated representation to an application.
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公开(公告)号：US10419064B2
公开(公告)日：2019-09-17
申请号：US15940721
申请日：2018-03-29
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Miralem Cosic , Shankar V. Achanta , Raymond W. Rice , Chen Zhu , Bryson R. Bechtel
Abstract: Systems, methods, and apparatuses for one-way communications are disclosed. A system includes a transmitter, a first receiver, and a second receiver. A transmitter transmits one or more messages on one or more channels according to a predetermined, pseudo-random channel hopping protocol. The receivers receive said transmissions according to the order of the pseudo-random channel hopping protocol. Methods for re-syncing the one-way system in the event of a power loss or other event causing desynchronization. Default waiting channels are established for the receivers once a certain number of channel detection periods according to the one-way communication protocol result in no detected signals.
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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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104.发明申请公开(公告)号：US20190273653A1
公开(公告)日：2019-09-05
申请号：US16248959
申请日：2019-01-16
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Dennis Gammel , Rhett Smith
Abstract: A software-defined network controller (SDN controller) defines a first network flow to be selectively implemented by a networking device according to a first network operation profile. The SDN controller defines a second network flow to be selectively implemented by the networking device according to a second network operation profile. A memory device of the networking device may store at least first and second network operation profiles for selective implementation based on network packet characteristic matching and/or a “trigger alarm” event. The first network operation profile is implemented when an incoming network packet matches a pre-defined and/or customizable network packet characteristic match template. The second network operation profile is implemented when a “trigger alarm” event is received. A network operation profile may execute a write action to latch, or otherwise trigger, a physical alarm of a networking device or associated device.
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公开(公告)号：US10333291B2
公开(公告)日：2019-06-25
申请号：US16106567
申请日：2018-08-21
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Ritwik Chowdhury , Dale S. Finney
Abstract: Detection and protection against electric power generator stator ground fault conditions in multiple-generator high-impedance grounded installations is provided herein. In one embodiment, a generator protection element may block a determination of a fault using third harmonic voltages when the third harmonic voltage from the generator is less than a factor of the maximum third harmonic voltage from all of the generators on the common bus. A tripping subsystem may issue a trip command based upon detection of a stator ground fault condition.
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Patent Agency Ranking
公开(公告)号：US20190173899A1
公开(公告)日：2019-06-06
申请号：US16206733
申请日：2018-11-30
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Cody W. Tews , Cassandra Seubert
Abstract: Systems and methods may be used to assess network communications by generating one or more thresholds for network traffic parameters based at least in part on a generated baseline for the network traffic parameter in the supervisory control and data acquisition system based on communications within the industrial network. Network communications may be assessed by determining whether the communications in the industrial network fall within the one or more thresholds for the network traffic parameter.
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107.发明申请公开(公告)号：US20190173754A1
公开(公告)日：2019-06-06
申请号：US15833468
申请日：2017-12-06
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Rhett Smith , Dennis Gammel
IPC: H04L12/24 , H04L12/715 , H04L12/851 , H04L12/721
Abstract: A software-defined network controller (SDN controller) defines a first network flow to be selectively implemented by a networking device according to a first network operation profile. The SDN controller defines a second network flow to be selectively implemented by the networking device according to a second network operation profile. The first and second network operation profiles are stored within a memory of the networking device to be selectively implemented based on the status of a profile selection input on the networking device. The profile selection input is a contact input in some embodiments. When the contact input is de-asserted, the networking device implements the first network flow according to the first network operation profile. When the contact input is asserted, the networking device implements the second network flow according to the second network operation profile.
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108.发明授权公开(公告)号：US10298498B2
公开(公告)日：2019-05-21
申请号：US15813586
申请日：2017-11-15
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Rhett Smith , Marc Ryan Berner , Josh Powers , David M. Buehler , Jason A. Dearien
IPC: H04L12/801 , H04L12/721 , H04L12/703 , H04L12/707
Abstract: The present disclosure pertains to systems and methods to identify high-priority traffic within a software defined network (“SDN”) and to route such traffic through physically distinct communication paths. Such routing may help to reduce network congestion faced by high-priority traffic and increase the reliability of transmission of such data. Certain embodiments may further be configured to generate a failover communication path that is physically distinct from a primary communication path. Still further, certain embodiments may be configured to suggest enhancements to a network that may improve a reliability criterion.
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公开(公告)号：US10298343B2
公开(公告)日：2019-05-21
申请号：US15448812
申请日：2017-03-03
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： David J. Dolezilek , Jorge Fernando Calero , Amandeep Singh Kalra , Brian T. Waldron
Abstract: The present disclosure pertains to systems and methods for publishing time-synchronized information. In one embodiment, a system may include a time interface configured to receive a common time signal and a network interface configured to transmit a plurality of data packets using a network. A publishing subsystem may be configured to cause the system to publish at least one data value according to a schedule and the common time signal. A processing sequence number subsystem may be configured to generate a processing sequence number to be included in the plurality of data packets and to reset the processing sequence number at a fixed interval based on the common time signal. A data packet subsystem may be configured to generate a plurality of data packets comprising a respective processing sequence number and the at least one data value.
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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
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.
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