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Assessment of the Phase-to-Ground Fault Apparent Admittance Method with Phase/Ground Boundaries to Detect Types of Electrical Faults for Protective Relays Using Signature Library and Simulated Events

Journal Article · · International Transactions on Electrical Energy Systems
DOI:https://doi.org/10.1155/2022/1951836· OSTI ID:1889502
 [1];  [2];
  1. Power Systems Resilience Group, Electrification and Energy Infrastructures Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
  2. Solar Energy Technologies Office, US Department of Energy, Washington D.C. 20585, USA
+ Show Author Affiliations

Protective relays in electric power grids recognize the types of electrical faults in a few seconds. The most common detection method to detect the types of electrical faults is based on measuring the angle between the zero and negative sequence currents. However, it is not completely accurate because the phase-to-phase-ground and phase-to-ground electrical faults could have the same detection conditions. Therefore, engineers need to plot the events after an electrical fault to observe the nature of the incidents in detail. In this study, the phase-to-ground fault apparent (PGFA) admittance method with phase/ground boundaries identified the types of electrical faults located in distribution power lines and feeders. This method was based on measuring the PGFA admittance magnitudes for the faulted and nonfaulted phases, resulting in greater than zero and near zero, respectively. The PGFA admittance algorithm was built with MATLAB/Simulink software and tested with signature library and grid simulation events. The PGFA method with phase/ground boundaries was evaluated with the confusion matrix. The measured and predicted values matched in more than 90% of the tests, and the PGFA admittance method with phase/ground boundaries presented an accuracy of 94.3% and a precision of 100%.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1889502
Alternate ID(s):
OSTI ID: 1892432
Journal Information:
International Transactions on Electrical Energy Systems, Journal Name: International Transactions on Electrical Energy Systems Vol. 2022; ISSN 2050-7038
Publisher:
Hindawi Publishing CorporationCopyright Statement
Country of Publication:
United States
Language:
English

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42 ENGINEERING
apparent impedance
power system protection
relaying
relays