Schweitzer Engineering Laboratories, Inc.

Mauricio G Silveira

Bharat Nalla

David James Dolezilek

Nishchal Sharma

Andrew W Rash

Jaya R A K Yellajosula

Manodev J Rajasekaran

Arun Shrestha

Sajal Harmukh

Glenn C Bethmann

Andrew A Miller

Ozan Akyildiz

Stephanie L McDaid

Edson L Hernandez Cortinas

Rajeev Kumar Babu

Timothy D Clemans

Elizabeth Viele

Lihua Ran

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.

Parallel redundancy protocol error detection

A fiber optic communication system may include a transmitting subsystem, a receiving subsystem, a power monitoring subsystem, a temperature monitoring subsystem, an alarm subsystem, and a data logging subsystem. The transmitting subsystem may be configured to transmit optical signals encoding data into an optical path. The receiving subsystem may be configured to receive the optical signals transmitted by the transmitting subsystem and decode the data encoded in the optical signal. The power monitoring subsystem may be configured to measure a power of the optical signal during normal operations. The temperature monitoring subsystem may monitor the temperature of the fiber optic communication system at various locations. The alarm subsystem may generate an alarm if the system operates outside of certain thresholds. The data logging subsystem may log the measured temperatures and optical signal power of the fiber optic communication system.

Fiber optic signal monitoring

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.

Real-time digital data degradation detection

The present disclosure relates to systems and methods to conduct a fuzzer test on a device under test and configured for use in an electric power system. In one embodiment, a system may include a configuration subsystem to receive a parameter of the device under test. A fuzzer subsystem in communication with the configuration subsystem may be configured to conduct a fuzzer test on the device under test. The fuzzer subsystem may include a fuzzer state machine to generate input data to deliver to the device under test, a packet buffer to store input data generated by the fuzzer state machine, and a packet regulator to deliver input data generated by the fuzzer state machine based the parameter. A physical interface in communication with the packet regulator may transmit input data to the device under test based on the parameter.

Fuzzer test system for applications in electric power systems

The present disclosure relates to systems and methods for testing communication systems. In one embodiment, a communication device tester may include a traffic disciplining subsystem to generate a first stream of data packets satisfying a metric and may communicate the first stream of data packets to a test device in a first test scenario. A delay subsystem may generate a variable delay in a second stream of data packets and communicate the second stream of data packets to the test device in a second test scenario. A data corruption subsystem may corrupt a third stream of data packets and communicate the third stream of data packets to the test device in a third test scenario. A test subsystem may determine whether the test device satisfies at least one criterion of each of the first test scenario, the second test scenario, and the third test scenario.

Communication system tester and related methods

Growing community of inventors

Pullman, WA, United States of America

Mauricio G Silveira