Schweitzer Engineering Laboratories, Inc.

Vinodev E Rajasekaran

Nishchal Sharma

Derek Lautenschlager

Tony J Lee

Arun Shrestha

Lisa Gayle Nelms

Bharat Nalla

Sajal Harmukh

Bryon S Bridges

Stephanie L McDaid

Karthi Sellakkannu

Guillermo Ramirez Conejo

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.

Real-time digital data degradation detection

Disclosed herein is a system for time aligning electric power system measurements at an intelligent electronic device (IED) using samples and sample time offset from merging units. The merging units do not require access to a common time signal. The IED does not require storage of a communication latency with the merging units. The sample time offset corresponds to a latency between obtaining the sample and receipt of the sample at the IED. The IED aligns samples from various merging units using sample time offset values communicated from the merging units to the IED. The IED performs monitoring and protection functions using the time aligned samples.

Sample time offset alignment of electric power system samples independent of a common time source

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Pullman, WA, United States of America

Vinodev E Rajasekaran