公开(公告)号：US12289344B2

公开(公告)日：2025-04-29

申请号：US18046671

申请日：2022-10-14

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Gregary C. Zweigle ,  Eric J. Hewitt ,  Matthew J. Halladay

IPC: H04L29/06 ,  H04L9/40

Abstract: Disclosed herein are systems, devices, and methods for improving cybersecurity in electric power systems. In one embodiment, a local controller configured for use in an electric power system may include a measurement subsystem to receive a plurality of conditions related to electrical conditions in a microgrid. A communication subsystem may communicate a set of data related to conditions in the microgrid to a remote controller; and receive a plurality of requests for control actions from the remote controller. An analysis subsystem may generate an assessment of the plurality of requests for control actions in relation to the plurality of conditions related to electrical conditions in the microgrid and identify a subset of the plurality of requests for control actions from the remote controller for execution based on the assessment. A control action subsystem may then issue a control action to an asset in the microgrid.

公开(公告)号：US20250047427A1

公开(公告)日：2025-02-06

申请号：US18363082

申请日：2023-08-01

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Mauricio G. Silveira ,  Bharat Nalla ,  Rajeev Kumar Babu ,  David J. Dolezilek ,  Edson L. Hernandez Cortinas ,  Nishchal Sharma ,  Andrew W. Rash ,  Andrew A. Miller ,  Lihua Ran

IPC: H04L1/22 ,  H04L1/1867 ,  H04L41/0604

Abstract: This disclosure pertains to systems and methods to detect network errors in a parallel redundant protocol (PRP) network. A node-level redundancy error subsystem of an intelligent electronic device (IED) maintains records (e.g., counts) of information associated with missing duplicate frames expected from node devices on the PRP network via redundant first and second local area networks (LANs). Non-zero counts of missing duplicate frames may be identified as network errors.

公开(公告)号：US12218694B2

公开(公告)日：2025-02-04

申请号：US18295915

申请日：2023-04-05

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Jeff L. Otto

IPC: H03M7/30 ,  H01H71/02 ,  H03K17/16

Abstract: An electric power system may include numerous devices electrically connected to numerous other devices. In some cases, it may be beneficial to quickly determine and resolve an electric power system topology. The present disclosure is directed to systems and methods for resolving an electric power system topology using bit pattern sequence compression. A multi-node device may be electrically coupled to one node per side. Each node may be associated with a bit value. The bit values may be compared to determine if the nodes are electrically coupled. This process may be recursively performed for all of the multi-node devices, until it is determined which devices are electrically coupled and which are electrically isolated.

公开(公告)号：US12153079B2

公开(公告)日：2024-11-26

申请号：US18301713

申请日：2023-04-17

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Kanchanrao Gangadhar Dase ,  James Burton Colwell ,  Matchyaraju Alla ,  Shreenivas Pai

IPC: G01R31/08 ,  G01R19/165

Abstract: Disclosed herein are systems for determining a broken conductor condition in a multiple-phase electric power delivery system. It has been observed that broken conductors pose a safety concern when occurring in the presence of people or vulnerable environmental conditions. Broken conductor conditions disclosed herein may be used to detect and trip the phase with the broken conductor, thus reducing or even eliminating the safety risk. Broken conductors may be determined using detected phase series arcing differences in one phase without commensurate differences in other phases. In various embodiments the phase series arcing attributes may be phase current monitored for decrement and/or phase resistance monitored for increase.

公开(公告)号：US12105490B2

公开(公告)日：2024-10-01

申请号：US17492908

申请日：2021-10-04

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Sreenivas Dingari ,  Angelo D'Aversa ,  Veselin Skendzic ,  Chandrasekaran Swaminathan ,  Greg Rzepka

IPC: G05B19/042 ,  G06F3/06 ,  H02H1/00

CPC classification number: G05B19/042 ,  G06F3/0604 ,  G06F3/0646 ,  G06F3/0673 ,  G05B2219/24215 ,  G05B2219/2639 ,  H02H1/0092

Abstract: Systems, devices, and methods include protection functions in an electrical power system. A processing subsystem may include a processor. A memory subsystem may comprise a first memory section and a second memory section. A memory management subsystem may, in a first operational mode, enable memory access between the processor and the first memory section and the second memory section and, in a second operational mode, enable memory access between the processor and only the first memory section.

公开(公告)号：US12055576B2

公开(公告)日：2024-08-06

申请号：US17929101

申请日：2022-09-01

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Cody W. Tews ,  Nicholas C. Seeley

IPC: G01R31/08 ,  H02H1/00

CPC classification number: G01R31/086 ,  H02H1/0007

Abstract: The present disclosure relates to systems and methods for calculating noise distributions in an electric power system. In one embodiment, a system to calculate a noise distribution in an electric power system may comprise a measurement subsystem to obtain a plurality of raw measurements of a parameter in the electric power system. A noise distribution determination subsystem may be configured to generate a plurality of scaled raw measurements from the plurality of raw measurements, generate a power spectrum density from the plurality of scaled raw measurements, generate a cumulative distribution from the power spectrum density, and determine a noise distribution from the power spectrum density. A protective action subsystem may monitor the parameter in the electric power system to identify a signal of interest by utilizing, at least in part, the noise distribution and generating a control action in response to the signal.

公开(公告)号：US12025679B2

公开(公告)日：2024-07-02

申请号：US17458849

申请日：2021-08-27

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Armando Guzman-Casillas ,  Peter S. LaDow

IPC: H02H7/00 ,  G01R31/40 ,  G01R31/58 ,  H02H3/093 ,  H02H7/26 ,  G01R31/08

CPC classification number: G01R31/58 ,  G01R31/40 ,  H02H3/093 ,  H02H7/26 ,  G01R31/085

Abstract: An electronic device includes input circuitry that obtains an input signal. The electronic device includes processing circuitry that has an integrating memory dropout (IMD) timer. The IMD timer generates an extended output signal that is asserted an extended amount of time that varies based at least in part on integration of the received input signal.

公开(公告)号：US11973680B2

公开(公告)日：2024-04-30

申请号：US18166670

申请日：2023-02-09

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Derek Lautenschlager ,  Arun Shrestha ,  Nishchal Sharma ,  Vinodev E. Rajasekaran ,  Karthi Sellakkannu ,  Sajal Harmukh

IPC: H04L43/16 ,  H04L43/0823 ,  H04L43/0829 ,  H04L43/0852

CPC classification number: H04L43/16 ,  H04L43/0829 ,  H04L43/0847 ,  H04L43/0852

Abstract: Systems and methods described herein monitor real-time digital data for degradation. A merging unit may measure electrical parameters in an electric power system using a sensor component and may generate a stream of digital data representing measured electrical parameters. The merging unit may transmit the stream of digital data representing measured electrical parameters and receive a plurality of data frames using an interface. A digital data degradation detection subsystem may analyze a plurality of digital metrics associated with the plurality of data frames and make a determination of whether a subset of the plurality of data frames satisfies the plurality of digital metrics, and the subset of the plurality of data frames fails at least one of the plurality of digital metrics. The merging unit may implement a response when the subset of the plurality of data frames fails at least one of the plurality of digital metrics.

公开(公告)号：USD1017562S1

公开(公告)日：2024-03-12

申请号：US29789985

申请日：2021-10-28

Applicant: Schweitzer Engineering Laboratories, Inc.

Designer： J P Howe ,  Nate Boos ,  Raymond M. Connolly, III

Abstract: FIG. 1 is a perspective view of a relay replacement assembly;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a left view thereof;
FIG. 7 is a back view thereof;
FIG. 8 is another perspective view thereof;
FIG. 9 is an exploded perspective view thereof; and,
FIG. 10 is an exploded perspective view thereof including optional components.
The broken lines in the figure drawings are included for the purpose of illustrating unclaimed environment and forms no part of the claimed design.

公开(公告)号：US11929608B2

公开(公告)日：2024-03-12

申请号：US17806319

申请日：2022-06-10

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Scott M. Manson ,  Jorge Fernando Calero ,  Angelos Kokkinis

IPC: H02H7/22 ,  H02H1/00

CPC classification number: H02H7/22 ,  H02H1/0007

Abstract: Systems and methods are described herein to accommodate different settings associated with an inverter-based electric power generator and an inverter-based electric power generator for electric power generation within an electric power delivery system. The electric power delivery system may provide electric power generated by a bulk electric system to the loads via distributed substations using a first operating frequency. Moreover, the distributed substations may include inverter-based electric power generators to supply the electric power demand of downstream loads in an islanded configuration. That said, the inverter-based electric power generators may supply the electric power using a second frequency that is higher than the first frequency. Protective systems, positioned downstream from the distributed substations, may use different settings associated with the bulk electric system or the inverter-based electric power generators based on detecting the frequency of the supplied electric power.