Patents Assigned to Schweitzer Engineering Laboratories, Inc.
  • Publication number: 20210111549
    Abstract: The present disclosure pertains to systems and methods for monitoring electrical arc events in an electric power system. In one embodiment, a system may comprise an arc flash detection (AFD) unit to detect electromagnetic radiation generated by an electrical arc event, a primary protection relay to generate measurements of an electric current, and an integrator. In various embodiments, the integrator may comprise a communication port to receive the detection of the electrical arc event and the measurements of the electric current. The integrator may also comprise a processing subsystem to validate the detection of the electrical arc and generate protective actions to interrupt the flow of the current to the electrical arc event.
    Type: Application
    Filed: February 12, 2020
    Publication date: April 15, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, David E. Whitehead, David J. Casebolt, Krishnanjan Gubba Ravikumar, Austin Edward Wade, Lisa Gayle Nelms, Brian R. Clark
  • Publication number: 20210111652
    Abstract: A controller may use energy packets to control a prime mover of a machine. The controller may include an energy packet measurement control to calculate energy packets and convert the energy packets into a fuel valve reference. Further, a frequency control may receive system feedback associated with the monitored machine and generate a frequency correction based on the system feedback. The controller may add the energy packet value and the frequency correction to determine a prime mover power reference and provide the prime mover power reference to a fuel valve control of the machine.
    Type: Application
    Filed: October 9, 2020
    Publication date: April 15, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Gregary C. Zweigle, Ellery A. Blood, Scott M. Manson
  • Publication number: 20210111561
    Abstract: A system may include a transformer that converts 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. The system may also include a processor that may receive the current data, determine a voltage at a location on the conductor based on the current data and an impedance associated with the conductor, and send a signal to a load tap changer in response to the voltage being different from an expected voltage at the location.
    Type: Application
    Filed: January 7, 2020
    Publication date: April 15, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: Jeremy William Blair
  • Patent number: 10979309
    Abstract: The present disclosure pertains to systems and methods for generation of a physical and logical design of a software defined network (SDN). In one embodiment, a system may receive a plurality of user-provided parameters associated with a plurality of performance requirements of the SDN. A library may include performance metrics of a plurality of devices comprised in the SDN. An SDN design subsystem may generate the physical and logical design of the SDN based on the user-provided parameters and the performance metrics of the devices in the library. A traffic routing subsystem may generate a plurality of communication flows based on the logical design of the physical and logical design and to be implemented by the SDN. An SDN simulation subsystem may generate an assessment of the physical and logical design of the SDN and the plurality of communication flows in comparison to the user-provided parameters.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: April 13, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Rhett Smith, David M. Buehler, Josh Powers
  • Patent number: 10978863
    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: Grant
    Filed: January 15, 2019
    Date of Patent: April 13, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Scott M. Manson, Shankar V. Achanta, Gregary C. Zweigle, Richard M. Edge
  • Patent number: 10979330
    Abstract: Disclosed herein is a system for time aligning electric power system measurements at an intelligent electronic device (IED) from signals from merging units where the merging unit does not require a common or external time source. Communications from merging units may arrive at different times due to differences in communication latency or other factor. The IED may associate digital samples from merging units with a local time domain of the IED based on the data acquisition, data processing, and data communication latency in communicating with the merging units.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: April 13, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Manodev J. Rajasekaran, Greg Rzepka, Bryon S. Bridges
  • Patent number: 10978866
    Abstract: Polarizing signals for electric power system directional overcurrent and distance protection are disclosed herein. The polarizing signal may be determined using a power system tracking signal, generated using a synchronous reference frame to track to a pre-fault voltage, and maintained using a phase-locked loop. The power system tracking signal may be used for a time after a voltage signal is lost, after which a self-polarizing signal may be used. Where voltage signals are not available, a current may be used to generate the polarizing signal.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: April 13, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bogdan Z Kasztenny, Chadburn Troy Daniels
  • Publication number: 20210102981
    Abstract: The present disclosure relates to spectral analysis in wireless current sensors. For example, a wireless current sensor (WCS) includes current transformer windings that harvest electrical energy from a power line and allow the WCS to obtain current measurements of the power line. The WCS includes a processor that obtains the current measurements of the power line via the current transformer windings. The processor generates a frequency domain representation of the current on the power line using the current measurements. The processor sends a wireless signal indicating results from the frequency domain representation to an intelligent electronic device (IED) that monitors the power line to allow the TED to analyze the results for anomalies.
    Type: Application
    Filed: October 3, 2019
    Publication date: April 8, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: James Mobley
  • Publication number: 20210102985
    Abstract: The present disclosure relates to a wireless neutral current sensor (WNCS) for monitoring a neutral cable of a capacitor bank. The WNCS may include a power storage device that provides power to allow the WNCS to send a test signal to a capacitor bank controller (CBC) of the capacitor bank to confirm operation of the WNCS during commissioning. The WNCS may include processing and communication circuitry that, during operation, detects an electrical characteristic on the neutral cable. The processing and communication circuitry may provide a message indicating the electrical characteristic to the CBC.
    Type: Application
    Filed: October 3, 2019
    Publication date: April 8, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Kei Hao, Shankar V. Achanta, Raymond W. Rice
  • Patent number: 10971295
    Abstract: The present disclosure relates to ensuring contact between core halves of a current transformer. For example, a current transformer (CT) may include a split core comprising a first core half having a first plurality of faces and a second core half having a second plurality of faces. Each face of the first core half may contact a corresponding face of the second core half to allow magnetic flux to flow through the split core to induce current on windings of the CT. The CT may include a first housing that houses the first core half and a second housing that the second core half. The CT may include a biasing element that biases the second core half towards the first core half to ensure that each face of the second core half contacts the corresponding face of the first core half.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: April 6, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Mark A. Thomas, Eric Ryan
  • Patent number: 10971933
    Abstract: This disclosure includes various systems and methods for determining an operating stage based on electrical conditions in electric power delivery systems and identifying a control strategy based upon the operating stage. The control strategy may be selected and customized to avoid or to ameliorate stresses in an electric power delivery system while maintaining the stability of electric power delivery systems. Various embodiments consistent with the present disclosure may include a distributed controller configured receive a plurality of indications of electrical conditions from a plurality of control devices in electrical communication with the electrical power delivery system. The distributed controller may determine an operating stage from among a plurality of operating stages based upon the plurality of indications of electrical conditions. The distributed controller may further identify a control strategy based upon the operating stage.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: April 6, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Gregary C. Zweigle, Ellery A. Blood
  • Patent number: 10962608
    Abstract: The present disclosure pertains to systems and methods for monitoring and protecting an electric power system. In one embodiment, a system may comprise line-mounted wireless current transformers to measure at least one parameter of an alternating current (AC), receive a synchronization signal at which to measure the AC, and send a message comprising the measured AC. The system may also comprise an intelligent electronic device (IED) to send the synchronization signal to and receive the messages from the line-mount wireless current transformers, determine whether a high-impedance fault (HiZ) exists between the line-mounted wireless current transformers, and implement a control action based on the existence of the HiZ fault.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: March 30, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Normann Fischer, Raymond W. Rice, Ravindra P. Mulpuri, James Mobley
  • Patent number: 10965079
    Abstract: Systems and methods are disclosed herein relating to eliminating solder bridges between adjacent leads of small-pitch through-hole electrical components soldered to circuit boards using wave-soldering techniques. Several wave solder pallet insert patterns are disclosed. Each wave solder insert may include an insert pattern of peeling members is intended to eliminate solder bridges from various small-pitch component lead layouts.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: March 30, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Tiffani T. Heitstuman, Jeff Bredeson, Greg Simpson
  • Publication number: 20210088595
    Abstract: The present disclosure relates to a capacitor bank controller that automatically determines the size of a capacitor bank. For example, the capacitor bank controller may obtain voltage and current measurements while the capacitor bank is disconnected from the power line. Further, the capacitor bank controller may obtain voltage and current measurements while the capacitor bank is connected to the power line. The capacitor bank controller may determine the size of the capacitor bank based on impedances from the voltage and current measurements while the capacitor bank is connected and disconnected.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 25, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: Kei Hao
  • Publication number: 20210088555
    Abstract: The present disclosure relates to a capacitor bank control system that uses a combination of line post sensors and wireless current sensors for control operations. For example, a capacitor bank controller may include one or more inputs that electrically couple to a line post sensor to allow the capacitor bank controller to obtain line post sensor measurements. The capacitor bank controller may include a transceiver that receives wireless current sensor measurements from first and second wireless current sensors. The capacitor bank controller may include a processor that controls one or more switching devices of a capacitor bank based at least in part on a combination of line post sensor measurements and wireless current sensor measurements.
    Type: Application
    Filed: September 24, 2019
    Publication date: March 25, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: Kei Hao
  • Publication number: 20210091559
    Abstract: The present disclosure pertains to detection of a broken conductor in an electric power system. In one embodiment, a broken conductor detector may be configured to be mounted to an electrical conductor and may comprise a communication subsystem configured to transmit a signal configured to indicate that the conductor is broken. A sensor may determine a plurality of vectors. A processing subsystem may be configured to receive the plurality of vectors from the sensor and to identify when the vector is outside of a range defined by a threshold value. The processing subsystem may determine that the conductor is falling based on the plurality of vectors remaining outside of the threshold for a period of time determined by the timer subsystem. A signal may be transmitted by the communication subsystem to indicate that the conductor is falling.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 25, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: James Mobley, Shankar V. Achanta, Raymond W. Rice
  • Publication number: 20210088561
    Abstract: The present disclosure pertains to a line-powered current measurement system to mount to an electrical conductor and related methods. In one embodiment, a system may comprise a current transformer to electrically couple to an electrical conductor and to generate a secondary current proportional to a primary current in the conductor. A power harvesting subsystem may harvest power from the secondary current in a first configuration. A switching subsystem may transition the line-powered current measurement device between the first configuration and a second configuration, in which a current measurement subsystem generates a measurement of the secondary current. The switching subsystem may provide the secondary current to the power harvesting subsystem in the first configuration and may bypasses the power harvesting subsystem in the second configuration. A communication subsystem may transmit the measurement of the secondary current to a receiver device.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 25, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: James Mobley, Raymond W. Rice
  • Patent number: 10955455
    Abstract: The present disclosure pertains to detection of a broken conductor in an electric power system. In one embodiment, a broken conductor detector may be configured to be mounted to an electrical conductor and may comprise a communication subsystem configured to transmit a signal configured to indicate that the conductor is broken. A sensor may determine an operating vector. A processing subsystem may be configured to receive the operating vector from the sensor and to identify when the operating vector is outside of a range defined by a rest vector and a threshold value. In certain embodiments, the threshold may comprise a three-dimensional sphere. The processing subsystem may determine that the conductor is broken based on the operating vector remaining outside of the range for a period of time determined by the timer subsystem. A signal may be transmitted by the communication subsystem to indicate that the conductor is broken.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: March 23, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: John Thompson, Mangapathirao Venkata Mynam
  • Publication number: 20210083478
    Abstract: The present disclosure relates to controlling a capacitor bank using current measurements from different current sensors depending on the power flow direction. For example, the system may perform capacitor bank control operations using current measurements from a first current sensor coupled to the power line between an initial source and the capacitor bank when power is flowing in a first power flow direction on the power line. The system may determine that power flow on the power line has changed from flowing in the first power flow direction to flowing in a second power flow direction from an updated source, different from the initial source. The system may, upon detecting the change in the power flow direction perform control operations of the capacitor bank using current measurements from a second current sensor between an updated source and the capacitor bank.
    Type: Application
    Filed: September 16, 2019
    Publication date: March 18, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Kei Hao, Mark W. Feltis, Naresh Malla
  • Patent number: 10951518
    Abstract: The present disclosure relates to packet routing using a registry to communicate packets between a first service and a second service of an electronic device. The electronic device may have memory that includes a registry having a table of services with at least one memory address of the second service being associated with consuming at least one packet type. The electronic device may store, in the first service, the at least one memory address of the second service and the at least one packet type. The electronic device may produce, via the first service, at least one packet of the at least one packet type. The electronic device may provide the at least one packet to the at least one memory address associated with the second service to allow the second service to consume data of the at least one packet.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: March 16, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Kenji R. Yamamoto, Rohan Shroff, Sudhirkumar Menon