Conference Papers

SynchroGrid's engineers further contribute to the system protection industry by publishing and presenting papers at the major relay conferences in the United States, including the Texas A&M, Georgia Tech, and Western Protective conferences.

SynchroGrid's publications focus on relay applications, fault analysis of events, and research results. Look below to see a few of the conference papers that we have presented recently.

Analyzing the Impact of Shunt Reactor Switching Operations Based on DFR Monitoring System

March 29, 2019

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Accepted by IEEE. © 2019 IEEE

L. Ghatpande, N. Ganta, J. Perez, and J. Burton, "Analyzing the Impact of Shunt Reactor Switching Operations Based on DFR Monitoring System," 2019 Annual Conference for Protective Relay Engineers (CPRE), College Station, TX, USA, 2019, pp. 1-8.

doi: 10.1109/CPRE.2019.8765884

In this paper, actual field data recorded from DFRs over a period of 14 months is analyzed to present and discuss the behavior of reactor switching due to inrush and other observed effects for different operating conditions. This paper has diverse, practical scenarios to offer in the form of waveforms during reactor energization which help understand and avoid misoperations.

Simplifying Wide Area Coordination of Directional Time Overcurrent Relays Using Automatic Settings Selection

March 29, 2019

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Accepted by IEEE. © 2019 IEEE

N. Thomas, L. Hankins, and J. Perez, "Simplifying Wide Area Coordination of Directional Time Overcurrent Relays Using Automatic Settings Selection," 2019 Annual Conference for Protective Relay Engineers (CPRE), College Station, TX, USA, 2019, pp. 1-6.

doi: 10.1109/CPRE.2019.8765880

In this paper, we present a framework for the automatic generation of coordinated relay settings for directional time overcurrent relays, which represents one of the most challenging coordination problems engineers face. Our framework extends existing approaches and increases the level of automation by seamlessly interacting with fault simulation software to both provide input to and verify the coordination results of pickup and time dial settings chosen by the setting generator.

An Innovative and Automated Solution for NERC PRC-027-1 Compliance

April 10, 2018

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Accepted by IEEE. © 2018 IEEE

C. Thomas, J. Perez, L. Hankins and H. Tribur, "An innovative and automated solution for NERC PRC-027-1 compliance," 2018 71st Annual Conference for Protective Relay Engineers (CPRE), College Station, TX, USA, 2018, pp. 1-11.

doi: 10.1109/CPRE.2018.8349772

Compliance with NERC PRC-027-1 has brought increasing stress to utilities as they work to establish a defined process for performing relay setting development and coordination at regular intervals. While current software programs attempt to aid utilities in complying with this new standard, they only offer an overwhelming and unmanageable report of coordination study results. None of the current programs provides a work flow from relay setting development to wide area coordination, which is what utilities desperately need. In this paper, we present an innovative process to comply with the R1, R2, and R3 requirements of PRC-027-1 through the use of an automated solution.

A Novel Approach to Relay Setting Development

April 3, 2017

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Accepted by IEEE. © 2017 IEEE

M. Boecker, G. Corpuz, J. Perez, and L. Hankins, "A Novel Approach to Relay Setting Development," 2017 70th Annual Conference for Protective Relay Engineers (CPRE), College Station, TX, USA, 2017, pp. 1-10.

DOI: 10.1109/CPRE.2017.8090041

This paper demonstrates a sophisticated solution that introduces engineers to an improved and more efficient relay setting development process. Using the latest software development tools, this new solution provides a more advanced method to calculate settings compared to existing methods, and provides an intelligent way to uniformly standardize relay setting templates, eliminate data transfer errors, and overall perform settings, peer-peer review processes and coordination studies at a fraction of the previous time.

Analysis of a Differential and Overcurrent Operation on a 345kV High Voltage Line Reactor

April 8, 2016

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Accepted by IEEE. © 2016 IEEE

E. Schroeder, J. Burton, J. Perez, and L. Hankins, "Analysis of a Differential and Overcurrent Operation on a 345kV High Voltage Line Reactor," 2016 69th Annual Conference for Protective Relay Engineers (CPRE), College Station, TX, USA, 2016, pp. 1-19.

In partnership with Cross Texas Transmission, this paper discusses the operation of two differential relays protection algorithms during a reactor inrush. Detail algorithm and waveform analysis of the Restrain and Operate current reveal the fundamental differences between the two relays.

Relay Loadability Challenges Experienced in Long Lines

April 8, 2016

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Accepted by IEEE. © 2016 IEEE

S. Lee and J. Perez, "Relay Loadability Challenges Experienced in Long Lines," 2016 69th Annual Conference for Protective Relay Engineers (CPRE), College Station, TX, USA, 2016, pp. 1-16.

This paper discusses the two forms of logic scheming: Load Encroachment Setting and Out-of-Step Logic scheming. These are presented as they are applied to long transmission lines, where it can be difficult if not impossible to apply both settings at the same time.

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