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Schweitzer Engineering Laboratories Inc patents


Recent patent applications related to Schweitzer Engineering Laboratories Inc. Schweitzer Engineering Laboratories Inc is listed as an Agent/Assignee. Note: Schweitzer Engineering Laboratories Inc may have other listings under different names/spellings. We're not affiliated with Schweitzer Engineering Laboratories Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "S" | Schweitzer Engineering Laboratories Inc-related inventors


 new patent  Traveling wave based single end fault location

Traveling wave information from a single end of an electric power delivery system is used to determine a fault location on a power line of the electric power delivery system. Hypotheses of which of a plurality of received traveling waves represents a first reflection from the fault are evaluated. ... Schweitzer Engineering Laboratories Inc

Local access control system management using domain information updates

Systems and methods are presented for managing physical access to an access-controlled area using a local access control system. In certain embodiments, information that may be used in access control determinations managed by a remote domain controller may be communicated to a local access control system for use in connection with local access control determinations performed by the access control system independent of the domain controller. ... Schweitzer Engineering Laboratories Inc

Systems and methods for magnetometer-based current measurement

The present disclosure provides systems and methods for utilizing two or more magnetometers for current measurements. The systems and methods may include two or more multi-axis magnetometer sensors to monitor a high-voltage three-phase alternating current (ac) transmission line carrying a current, i. ... Schweitzer Engineering Laboratories Inc

Island detection and control of a microgrid

This disclosure pertains to control systems used in electric power systems. In one embodiment, a plurality of intelligent electronic devices (ieds) is configured to monitor a respective portion of an electric power system. ... Schweitzer Engineering Laboratories Inc

Methods and systems for evaluating arc flash exposure hazard

An arc flash validation system that detects incident energy produced by an arc flash is disclosed. The arc flash validation system comprises one or more power transformers (pt) and current transformers (ct). ... Schweitzer Engineering Laboratories Inc

Traveling wave based single end fault location

Traveling wave information from a single end of an electric power delivery system is used to determine a fault location on a power line of the electric power delivery system. Hypotheses of which of a plurality of received traveling waves represents a first reflection from the fault are evaluated. ... Schweitzer Engineering Laboratories Inc

Systems and methods for system-wide digital process bus fault recording

The present disclosure provides systems and methods for generating a system-wide event report for electrical power delivery systems. A monitoring device within the power system may generate a key message upon the occurrence of a predetermined condition. ... Schweitzer Engineering Laboratories Inc

Electric power system monitoring using distributed conductor-mounted devices

Disclosed herein are systems for monitoring and protecting an electric power system using a plurality of conductor-mounted detectors (cmds). In one embodiment, a plurality of cmds are coupled to an electrical conductor. ... Schweitzer Engineering Laboratories Inc

Detection and remediation of transients in electric power systems

The present disclosure relates to systems and methods for detection of transients in electric power systems. In one embodiment, a system may detect and remediate a potentially destabilizing transient condition. ... Schweitzer Engineering Laboratories Inc

Systems and methods for routing sampled values upon loss of primary measurement equipment

Systems and methods are disclosed for providing measurement data redundancy to intelligent electronic devices (ieds) in an electric power system, without additional redundant components. In various embodiments, a first measurement device obtains measurement data from a first portion of the electric power delivery system. ... Schweitzer Engineering Laboratories Inc

Routing of traffic in network through automatically generated and physically distinct communication paths

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. ... Schweitzer Engineering Laboratories Inc

Time-domain line differential protection of electric power delivery systems

The present disclosure relates to detection of faults in an electric power system. In one embodiment, a time-domain traveling wave directional subsystem is configured to receive a plurality of current traveling wave and a plurality of voltage traveling wave time-domain representations based on electrical conditions in the electric power delivery system. ... Schweitzer Engineering Laboratories Inc

Systems and methods for motor slip calculation using shaft-mounted sensors

Systems and methods are disclosed herein for monitoring and detecting a loss of synchronism in an electric motor, such as a synchronous motor. A monitoring system may compare a measured or provided electric power system frequency with a measured rotational frequency of the rotor of the electric motor. ... Schweitzer Engineering Laboratories Inc

Low-power fiber optic transceiver

The present disclosure pertains to systems and methods for low-power optical transceivers. In one embodiment, a low-power optical transceiver may include a microcontroller and an optical receiver and an optical transmitter in communication with and controlled by the microcontroller. ... Schweitzer Engineering Laboratories Inc

03/01/18 / #20180062552

Electric motor protection using stator current and voltage measurements

Monitoring conditions of an electric motor using stator current and voltage signals from power supplied to the motor is disclosed herein. The stator voltage and current signals may be used to calculate instantaneous power values which may be used to calculate slip. ... Schweitzer Engineering Laboratories Inc

02/01/18 / #20180034317

Microgrid power flow monitoring and control

A microgrid power flow monitoring and control system is described herein. The control system may determine active and reactive power sharing shortage on the electric power delivery system. ... Schweitzer Engineering Laboratories Inc

02/01/18 / #20180034258

Fault detection and protection during steady state using traveling waves

An electric power delivery system may be protected upon occurrence of a fault condition by the systems and methods disclosed herein by detecting the fault condition and signaling a protective action before the overcurrent condition reaches the protective equipment. The protective action may be an opening of a circuit breaker or engagement of a fault current limiter. ... Schweitzer Engineering Laboratories Inc

01/25/18 / #20180024203

Detection of electric power system anomalies in streaming measurements

The present disclosure pertains to detection of anomalous conditions in a variety of types of systems. In one embodiment, a system may be configured to identify anomalous conditions in a stream of measurements. ... Schweitzer Engineering Laboratories Inc

01/11/18 / #20180013375

Slip-dependent motor model

The present disclosure pertains to systems and methods configured to monitor and protect an electric motor during startup using a motor model. The motor model parameters may be calculated using measurements taken during a calibration start of the electric motor. ... Schweitzer Engineering Laboratories Inc

12/14/17 / #20170358913

Overcurrent element in time domain

The present disclosure pertains to systems and methods for supervising protective elements in electric power systems. In one embodiment, a system may be configured to selectively enable a protective action an electric power system. ... Schweitzer Engineering Laboratories Inc

12/14/17 / #20170356965

Phase selection for traveling wave fault detection systems

Phase selection for traveling wave fault detection systems is disclosed herein. Intelligent electronic devices (ieds) may be used to monitor and protect electric power delivery systems by detecting and acting upon traveling waves. ... Schweitzer Engineering Laboratories Inc

12/07/17 / #20170351223

Time distribution device with multi-band antenna

Systems and methods for detecting the failure of a precision time source using an independent time source are disclosed. Additionally, detecting the failure of a gnss based precision time source based on a calculated location of a gnss receiver is disclosed. ... Schweitzer Engineering Laboratories Inc

11/30/17 / #20170346290

Inertia compensated load tracking in electrical power systems

The present disclosure relates to systems and methods for balancing electrical generation and electrical demand in an electrical power system. In various embodiments, a controller may receive priority designations associated with a plurality of loads and inertia of a plurality of electrical generators. ... Schweitzer Engineering Laboratories Inc

11/16/17 / #20170328945

High-impedance fault detection using coordinated devices

A conductor-mounted device (cmd) used to signal an intelligent electronic device (ied) of the existence of a fault on a portion of the electric power delivery system is described herein. The cmd may provide a heartbeat signal to the ied. ... Schweitzer Engineering Laboratories Inc

11/09/17 / #20170322283

Systems and methods for revenue meter testing

Continuous monitoring of an electric power system during testing of a primary electric power meter is described herein. Electric power system signals or test signals may be selectively supplied to the primary electric power meter. ... Schweitzer Engineering Laboratories Inc

10/26/17 / #20170311440

High-current pcb traces

The present disclosure relates to systems and methods using thermal vias to increase the current-carrying capacity of conductive traces on a multilayered printed circuit board (pcb). In various embodiments, parameters associated with vias may be selected to control various electrical and thermal properties of the conductive trace. ... Schweitzer Engineering Laboratories Inc

10/05/17 / #20170289117

Communication device for implementing trusted relationships in a software defined network

The present disclosure pertains to systems and methods for establishing trust relationships between a software defined network (sdn) controller and a sdn communication device. In one embodiment, a sdn controller may comprise a communications interface configured to communicate with a plurality of sdn network devices. ... Schweitzer Engineering Laboratories Inc

10/05/17 / #20170288950

Communication link monitoring and failover

The present disclosure relates to systems and methods for detection of a failed communication link and rerouting network traffic around the failure. One embodiment of a system consistent with the present disclosure may comprise a communication subsystem in communication with the data network and configured to transmit information to a recipient. ... Schweitzer Engineering Laboratories Inc

09/21/17 / #20170271882

Decentralized generator control

The present disclosure pertains to distributed controllers configured to control a plurality of electrical generators in an electrical generation and distribution system. In one embodiment, a distributed controller consistent with the present disclosure may include a communication subsystem to obtain a first plurality of time-stamped electrical parameter measurements from a first node. ... Schweitzer Engineering Laboratories Inc

09/21/17 / #20170271872

Decentralized generator control

The present disclosure pertains to distributed controllers configured to control a plurality of electrical generators in an electrical generation and distribution system. In one embodiment, a distributed controller consistent with the present disclosure may include a communication subsystem configured to communicate via a network. ... Schweitzer Engineering Laboratories Inc

08/31/17 / #20170248635

Correction for linear interpolation error

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. ... Schweitzer Engineering Laboratories Inc

08/10/17 / #20170227651

Multi-constellation gnss integrity check for detection of time signal manipulation

The present application discloses detecting manipulation of gnss signals using a second time source. If two or more gnss constellation signals are being detected, the phase error between the gnss constellation signals may be monitored. ... Schweitzer Engineering Laboratories Inc

08/03/17 / #20170221287

Transient asset management systems and methods

Systems and methods are disclosed that provide for managing transient assets used in connection with an access-controlled area of a distribution site of an electric power delivery system. In some embodiments, one or more users entering and access-controlled area may be identified via physical access control credentials provided to an associated access control system. ... Schweitzer Engineering Laboratories Inc

07/27/17 / #20170214249

Synchronization of generators using a common time reference

The present disclosure pertains to systems and methods for using time synchronized measurements of a generator output and an electrical bus, together with generator control algorithms to synchronize the frequency, voltage, and phase of a generator, or group of generators, prior to electrically connecting the generator to the electrical bus. More particularly, but not exclusively, the present disclosure pertains to systems that may be operated in an islanded configuration and in which one or more generators may be selectively synchronized based on a common time reference. ... Schweitzer Engineering Laboratories Inc

07/27/17 / #20170211669

Rotary actuation device

This disclosure relates to various embodiments of rotary actuation devices that may be utilized in a variety of applications. In one embodiment, a rotary actuation device is configured to transition between a first position and a second position in response to each of a manual adjustment, an activation of an electrical actuator, and a force generated by a deck device. ... Schweitzer Engineering Laboratories Inc

07/20/17 / #20170207792

Systems and methods for analog to digital converter failure identification

The present disclosure provides systems and methods for identifying and reporting failures of an analog to digital (a/d) conversion system. The systems and methods may detect and report a problem of input circuitry of an a/d converter and/or an a/d converter itself. ... Schweitzer Engineering Laboratories Inc

07/20/17 / #20170207053

Lockout relay device

This disclosure relates to various embodiments of lockout relay devices. In one embodiment, a lockout relay device may transition between a closed position and a lockout position in response to an action of a deck device. ... Schweitzer Engineering Laboratories Inc

07/06/17 / #20170195362

Time signal manipulation and spoofing detection based on a latency of a communication system

This disclosure relates to detecting manipulation or spoofing of a time based on a latency of a communication system. In one embodiment, a system includes a time input to receive a time signal. ... Schweitzer Engineering Laboratories Inc

06/29/17 / #20170187385

Supervision of input signal channels

The present disclosure pertains to systems and methods for monitoring a plurality of analog-to-digital converters. In one embodiment, a plurality of input channels may each be in communication with a different phase of a three-phase electric power delivery system. ... Schweitzer Engineering Laboratories Inc

06/15/17 / #20170170773

Shaft mounted monitor for rotating machinery

Disclosed herein is a shaft-mounted monitor for monitoring conditions of a rotating shaft using a calculated rotational component of the rotating shaft. The monitor may include a sensor such as an accelerometer, thermal sensor, strain gauge, or the like. ... Schweitzer Engineering Laboratories Inc

06/08/17 / #20170160301

Speed and angle monitor for rotating machinery

Disclosed herein is a shaft-mounted sensor for determining a rotational component of a rotating shaft. The rotational component may be a rotational speed and an angular position of the rotating shaft. ... Schweitzer Engineering Laboratories Inc

05/11/17 / #20170131343

Fault location using traveling waves

The present disclosure relates to calculating a fault location in an electric power transmission system based on traveling waves. In one embodiment, a system consistent with the present disclosure may be configured to detect a fault in an electric power transmission system. ... Schweitzer Engineering Laboratories Inc

04/20/17 / #20170111904

Deterministic transmission of communication packets of multiple protocols on a network

Systems and methods for preserving determinism of communications formatted according to a deterministic communication protocol where communications formatted according to various communications protocols are transmitted. The system includes a packet parsing module and a multiplexing engine to determine scheduled egress times and delay transmission of certain communications until communications that are formatted according to the deterministic communication protocol have egressed an outbound port.. ... Schweitzer Engineering Laboratories Inc

04/20/17 / #20170110875

High-frequency electric power system signal processing system

The present disclosure pertains to systems and methods for obtaining and processing high-frequency electric power system measurements for control and monitoring of an electric power system. High-frequency measurements may be used to detect traveling waves and/or to detect faults in the electric power system. ... Schweitzer Engineering Laboratories Inc

04/20/17 / #20170108542

Determining status of electric power transmission lines in an electric power transmission system

The present application discloses systems and methods to determine loss of at least one electric power transmission line in an electric power transmission system. In various embodiments, a system consistent with the present disclosure may include an electrical parameter monitoring subsystem configured to receive electrical parameter measurements and to determine a change of the electrical measurements. ... Schweitzer Engineering Laboratories Inc

04/13/17 / #20170104324

Traveling wave directional element

The present disclosure relates to a fault in an electric power delivery system. In one embodiment, a system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system. ... Schweitzer Engineering Laboratories Inc

04/13/17 / #20170102444

Testing system for traveling wave fault detectors

A testing apparatus for imposing a traveling wave signal on an electric system signal for testing a fault detector is disclosed herein. The fault detector may be configured to simulate a fault at a particular location by controlling the timing of the traveling wave signal. ... Schweitzer Engineering Laboratories Inc

04/13/17 / #20170102426

Electric power system monitoring using high-frequency signals

A system for monitoring an electric power delivery system by obtaining high-frequency electric power system measurements and displaying event information is disclosed herein. The system may use the high-frequency electric power system information to detect traveling waves. ... Schweitzer Engineering Laboratories Inc

03/23/17 / #20170082675

Time-domain directional line protection of electric power delivery systems

The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem is configured to determine a forward torque, an operating torque, and a reverse torque based on the plurality of time-domain representations of electrical conditions. ... Schweitzer Engineering Laboratories Inc

03/02/17 / #20170063482

Time distribution switch

Systems and methods for detecting the failure of a precision time source using an independent time source are disclosed. Additionally, detecting the failure of a gnss based precision time source based on a calculated location of a gnss receiver is disclosed. ... Schweitzer Engineering Laboratories Inc

02/23/17 / #20170054495

Transmission line protection using traveling waves in optical ground wire fiber

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. ... Schweitzer Engineering Laboratories Inc

02/16/17 / #20170046895

Resource management based on physical authentication and authorization

Systems and methods are disclosed that provide for management of resources of one or more systems included in an access-controlled area of a distributed site of an electric power delivery system. In certain embodiments, one or more users entering and access-controlled area may be identified via physical access control credentials provided to an associated access control system. ... Schweitzer Engineering Laboratories Inc

02/16/17 / #20170046894

Transient asset management systems and methods

Systems and methods are disclosed that provide for managing transient assets used in connection with an access-controlled area of a distribution site of an electric power delivery system. In some embodiments, one or more users entering and access-controlled area may be identified via physical access control credentials provided to an associated access control system. ... Schweitzer Engineering Laboratories Inc

02/16/17 / #20170046892

Local access control system management using domain information updates

Systems and methods are presented for managing physical access to an access-controlled area using a local access control system. In certain embodiments, information that may be used in access control determinations managed by a remote domain controller may be communicated to a local access control system for use in connection with local access control determinations performed by the access control system independent of the domain controller. ... Schweitzer Engineering Laboratories Inc

02/16/17 / #20170046890

Physical access management using a domain controller

Systems and methods are disclosed for managing physical access to an access-controlled area using a domain controller. In certain embodiments, physical access attribute and/or credential information may be managed as part of a user entry in a directory service managed by the domain controller. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026349

Communication device for implementing selective encryption in a software defined network

The present disclosure pertains to systems and methods for selectively encrypting data flows within a software defined network (sdn). In one embodiment, a communication device may be configured to receive a plurality of unencrypted data packets. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026292

Communication link failure detection in a software defined network

The present disclosure pertains to systems and methods of monitoring communication devices and communication links in a software defined network (sdn). In one embodiment a system may include a data bus and a communication interface in communication with the data bus. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026291

Routing of traffic in network through automatically generated and physically distinct communication paths

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. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026276

Simulating, visualizing, and searching traffic in a software defined network

The present disclosure pertains to systems and methods for simulating data packet routing within a software defined network (“sdn”), visualizing the results of the simulation, and permitting a user to search the resulting simulation. In one specified embodiment, a system may receive from a user a simulation parameter associated with a packet to be simulated in the sdn. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026252

Communication host profiles

The present disclosure pertains to systems and methods for automating the configuration of communication hosts in a software defined network (sdn) associated with an electric power transmission and distribution system. The systems and methods presented herein may utilize communication host profiles to specify various repeatable attributes and customizable attributes that may be utilized to configure the communication host and the sdn. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026243

Configuration of a software defined network

The present disclosure pertains to systems and method for configuration of communication flows in a software defined network (“sdn”). In one embodiment, a system is operable to configure a communication flow between a first host and a second host. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026226

Communication device with persistent configuration and verification

The present disclosure pertains to systems and methods for establishing communication with a remote communication device in a software defined network (sdn) during time when an sdn controller is unavailable. In one embodiment, a local communication device may be configured to receive a plurality of data flows from an sdn controller and to store the plurality of data flows in a persistent data memory. ... Schweitzer Engineering Laboratories Inc

01/26/17 / #20170026225

Network reliability assessment

The present disclosure pertains to systems and methods for assessing reliability of communication links in a software defined network (sdn). In one embodiment, a system may include an sdn architecture subsystem configured to generate sdn architecture information and a bandwidth subsystem configured to generate bandwidth information. ... Schweitzer Engineering Laboratories Inc

01/19/17 / #20170019120

Systems and methods for identifying a failure in an analog to digital converter

The present disclosure provides systems and methods for identifying failures in an analog to digital (a/d) converter. An intelligent electronic device (ied) may monitor a digital output of one or more a/d converters. ... Schweitzer Engineering Laboratories Inc

01/12/17 / #20170012424

Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements

The present disclosure pertains to systems and methods for detecting faults in an electric power delivery system. In one embodiment, a system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions. ... Schweitzer Engineering Laboratories Inc








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