Patents Assigned to Schweitzer Engineering Laboratories, Inc.
  • Patent number: 11522358
    Abstract: Systems, devices, and methods include protective functions in an electrical power system. For example, a processing subsystem may include a first processor and a second processor. The first processor and the second processor may operate independently. A memory subsystem may comprise a first memory section and a second memory section. A memory management subsystem may enable memory access between the first processor and the first memory section and disable memory access between the first processor and the second memory section. The memory management subsystem may further enable memory access between the second processor and the second memory section and disable memory access between the second processor and the first memory section. A protection subsystem may include the first processor and the first memory section and enable a protection function. The second processor and the second memory section may provide a second function that operates independently of the protection function.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: December 6, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Lisa Gayle Nelms, Dean G. Stevens, Paul Stoaks
  • Publication number: 20220385058
    Abstract: An intelligent electronic device (IED) may obtain a voltage measurement matrix based on an arrangement of a transformer in a power system. The TED may obtain a delta connection compensating angle based on the location of the circuit breaker and the transformer arrangement. The IED may obtain voltage measurements of the transformer. The TED may determine a residual flux value of the transformer based at least in part on the voltage measurements, the voltage measurement matrix and the delta connection compensating angle. The TED may send a signal to a circuit breaker of the transformer to connect the transformer to the power system based at least in part on the system voltage and residual flux value.
    Type: Application
    Filed: May 12, 2021
    Publication date: December 1, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Gabriel Benmouyal, Ritwik Chowdhury
  • Patent number: 11513143
    Abstract: Systems and methods to test an electric power delivery system include a communication subsystem to transmit test signals to one or more merging units, a test subsystem to transmit a test data stream to the one or more merging units via the communication subsystem, and a processor subsystem to receive looped back data from the one or more merging unit in response to the transmitted test data stream and to determine an operating condition based on the looped back data.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: November 29, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, David E. Whitehead, Krishnanjan Gubba Ravikumar, Austin Edward Wade
  • Publication number: 20220377003
    Abstract: Systems and methods are disclosed to monitor real-time digital data for degradation. In one embodiment, an intelligent electronic device (“IED”) in an electric power system may include an interface to receive a stream of digital data, the stream of digital data comprising a plurality of data frames. A protective action subsystem may monitor the sampled digital data and implement a protective action based on the stream of sampled digital data. A digital data degradation detection subsystem may analyze a plurality of digital metrics associated with the plurality of data frames and make a determination regarding degradation of a communication channel based on whether the plurality of digital metrics fails at least one threshold. In response to the determination, the digital data degradation detection subsystem may implement a response to the determination that the plurality of digital metrics fails at least one threshold.
    Type: Application
    Filed: May 20, 2021
    Publication date: November 24, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bharat Nalla, Nishchal Sharma, Arun Shrestha, Ozan Akyildiz, Mauricio G. Silveira, Manodev J. Rajasekaran, Sajal Harmukh, Jaya R A K Yellajosula
  • Patent number: 11506546
    Abstract: A system may include a transformer that may convert a first voltage to a second voltage, such that the second voltage is output via a conductor. The system may also include a wireless current sensor that may detect current data associated with current conducting via the conductor and a processor. The processor may receive the current data, determine one or more temperature measurements associated with the transformer based on the current data, and send a signal to a component in response to the one or more temperature measurements exceeding one or more respective threshold values.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: November 22, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Jeremy William Blair
  • Patent number: 11509329
    Abstract: The present disclosure pertains to systems and methods to compress an input signal representing a parameter in an electric power system. In one embodiment, a system includes a data acquisition subsystem to receive an input signal comprising a plurality of high-speed representations of electrical conditions. A linear prediction subsystem generates an excitation signal estimate based on the input signal, a plurality of linear prediction coefficients based on the input signal, and an estimated signal based on the excitation signal estimate and the plurality of linear prediction coefficients. An error encoding subsystem may generate an encoding of an error signal based on a difference between the input signal and the estimated signal. A non-transitory computer-readable storage medium may store an encoded and compressed representation of the input signal comprising the excitation signal estimate, the plurality of linear prediction coefficients, and the encoding of the error signal.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: November 22, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Eric Andrew Silk, Peter S. LaDow, Matthew J. Halladay
  • Publication number: 20220364401
    Abstract: The present disclosure relates to an ambidextrous hinge. The ambidextrous hinge includes a first knuckle with a first engagement feature, a second knuckle with a second engagement feature, and a third knuckle movably coupled between the first knuckle and the second knuckle. The third knuckle includes a third engagement feature that engages the first engagement feature to cause the ambidextrous hinge to lock in a first open position when used as a first swing hinge. The third knuckle includes a fourth engagement feature that engages the second engagement feature to cause the ambidextrous hinge to lock in a second open position when used as a second swing hinge.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 17, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: Eric M. Sawyer
  • Publication number: 20220365137
    Abstract: A condition-based monitoring system receives a plurality of measurements from sensors measuring mechanical and electrical aspects of a prime mover and a synchronous machine. The condition-based monitoring system determines a correlation between the mechanical measurements and electrical measurements to estimate parameters of the model. The condition-based monitoring system also updates the model as sensors obtain additional measurements during operation of the prime mover.
    Type: Application
    Filed: May 13, 2021
    Publication date: November 17, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Scott M. Manson, Ellery A. Blood, Gregary C. Zweigle
  • Publication number: 20220368125
    Abstract: Output circuit devices for use in electric power systems may include a first output subsystem for transmitting a first signal output via an output port to a component of the electric power system, an input subsystem for receiving and monitoring the first signal output transmitted by the first output subsystem, and a second output subsystem for transmitting another signal output to the component of the electric power system. The second output subsystem is to transmit the signal output in response to an indication from the input subsystem. Intelligent electronic devices (IEDs) and associated methods may include one or more output circuit devices.
    Type: Application
    Filed: May 11, 2021
    Publication date: November 17, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Evan J. Penberthy, Brian James Peterson
  • Patent number: 11502825
    Abstract: A system includes an entropy device configured to generate and distribute input entropy data and an intelligent electronic device (IED) of an electric power distribution system. The IED is configured to perform operations that include receiving the input entropy data distributed by the entropy device, generating a set of keys using the input entropy data, and establishing a Media Access Control Security (MACsec) communication link using the set of keys.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: November 15, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Colin Gordon, Dennis Gammel
  • Patent number: 11500407
    Abstract: Systems and methods to disconnect a faulted region of a power grid are described. For example, a control system may obtain a set of regions of a power grid. The control system may obtain a current magnitude and a voltage magnitude of the power grid. The control system may detect a fault in the power grid based at least in part on the current magnitude. The control system may, from the set of regions, determine a faulted region that the fault is located within based on a voltage magnitude of one or more buses in the power grid, a net change in power with respect to time of one or more regions in the set of regions, or both. The control system may send one or more signals to electrically disconnect the faulted region from the power grid.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: November 15, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Bharath Nayak, Christopher P. Knox, Ceeman B. Vellaithurai
  • Publication number: 20220359142
    Abstract: Configurable binary circuits for use in electrical power systems may include an input/output port, a binary input subsystem for receiving a binary input signal, a binary output subsystem for transmitting a binary output signal, and a switch subsystem for selecting one of the binary input subsystem or the binary output subsystem for operation. Intelligent electronic devices (IEDs) and associated methods may include one or more configurable binary circuits.
    Type: Application
    Filed: May 5, 2021
    Publication date: November 10, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Brian James Peterson, Evan J. Penberthy, Greg Rzepka
  • Publication number: 20220349929
    Abstract: The present disclosure pertains to systems and methods for detecting lightning and using such information to implement appropriate control strategies in an electric power 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 system. The system may also include a traveling wave subsystem to identify an initial traveling wave in the electric power system and generated by lightning and identify at least one subsequent traveling wave in the electric power system and generated by lightning. A lightning analysis subsystem may perform an analysis of the initial traveling wave and the at least one subsequent traveling wave to determine a characteristic of the ionosphere based on the analysis and a lightning location. An adaptive control subsystem may adjust a control strategy based on the lightning location.
    Type: Application
    Filed: April 28, 2021
    Publication date: November 3, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: Cody W. Tews
  • Patent number: 11489554
    Abstract: A system includes a switch of an electric power distribution system, the switch being configured to receive data and to transmit data, and the system includes a controller configured to communicatively couple to the switch. The controller is configured to create a software defined network by instructing the switch to transmit data to a location, and the controller is configured to generate a set of keys and to provide the set of keys to the switch to enable the switch to communicate data via a Media Access Security (MACsec) communication link, a MACsec key agreement (MKA) connectivity association, or both.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: November 1, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Colin Gordon, Duane C. Skelton
  • Publication number: 20220344926
    Abstract: The present disclosure relates to systems and methods of sag in a power line. In an embodiment, a monitoring device may include a distance sensor and an operating parameter sensor. A processor of the monitoring device may acquire, via the distance sensor, a first distance measurement. The processor may acquire, via the operating parameter sensor, a first operating parameter measurement. The processor may provide an output signal indicating that the power line is sagging when a combination of the first distance measurement and the first operating parameter measurement exceed a first combined distance-operating parameter threshold.
    Type: Application
    Filed: July 8, 2022
    Publication date: October 27, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Scott M. Manson, Shankar V. Achanta, Gregary C. Zweigle, Richard M. Edge
  • Publication number: 20220345488
    Abstract: An intelligent electronic device (IED) of an electric power distribution system includes processing circuitry and a memory that includes a tangible, non-transitory, computer-readable comprising instructions. The instructions, when executed by the processing circuitry, are configured to cause the processing circuitry to receive operating data associated with the electric power distribution system, determine whether the operating data matches with expected operating data, generate a connectivity association key (CAK) based on the operating data in response to a determination that the operating data matches with the expected operating data, and establishing a connectivity association based on the CAK.
    Type: Application
    Filed: July 8, 2022
    Publication date: October 27, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Ryan Bradetich, Colin Gordon, Arun Shrestha, Karen SJ Wyszczelski, Hidayatullah Ahsan
  • Publication number: 20220337575
    Abstract: Embodiments herein include an intelligent electronic device (IED) by employing a multi-factor authentication process. In some embodiments, to change the access level of the IED, the user may use the password and additional inputs such as an off-site operator sending a command, or the user engaging a push button or switch local to the IED.
    Type: Application
    Filed: April 15, 2021
    Publication date: October 20, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: David J. Bowen, David J. Dolezilek
  • Patent number: 11474139
    Abstract: Improvements in the functioning of a line-mounted device to calculate a direction to a fault during current transformer (CT) saturation are disclosed herein. The line-mounted device may determine a load direction using voltage and current zero-crossings and a power system frequency before the fault condition. The line-mounted device may determine a fault direction in relation to the direction to the load after calculating and removing direct current (DC) components of a sampled current signal using valid sample pairs obtained during unsaturated regions of peaks of the sampled current signal. The line-mounted device may indicate the direction to the fault. A system of line-mounted devices may be used to determine a faulted section of a power system using indications of fault direction.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: October 18, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Kei Hao
  • Patent number: 11476655
    Abstract: Systems and methods to estimate trapped charge for a controlled automatic reclose are described herein. For example, an intelligent electronic device (IED) may calculate an analog amount of trapped charge of each phase of a power line based on voltage measurements of the power line. The IED may close a switching device of each phase at a time corresponding to a point-on-wave associated with the analog amount of trapped charge of the respective phase.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: October 18, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Ritwik Chowdhury, Gabriel Benmouyal, Carolyn Sun
  • Publication number: 20220326315
    Abstract: A test system for an electrical system includes a slot array having a plurality of slots and a plurality of recesses formed therethrough, a plurality of mounts in which each mount of the plurality of mounts is positioned within a respective recess of the plurality of recesses to align with a respective slot of the plurality of slots, a connector port having a plurality of pins, and a plurality of conductors in which each conductor of the plurality of conductors extends from a respective pin of the plurality of pins to a respective mount of the plurality of mounts. Each mount of the plurality of mounts is configured to receive an additional conductor via a corresponding slot of the plurality of slots to electrically couple the additional conductor to a corresponding pin of the plurality of pins via a corresponding conductor of the plurality of conductors.
    Type: Application
    Filed: April 9, 2021
    Publication date: October 13, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Brandon M. Barber, Mike Basford, Michael R. Dowdy, Martin D. Gardner