A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer

Umer Ehsan, Muhammad Jawad, Umar Javed, Khurram Shabih Zaidi, Ateeq Ur Rehman, Anton Rassõlkin, Maha M. Althobaiti, Habib Hamam and Muhammad Shafiq
Additional contact information
Umer Ehsan: Department of Electrical and Computer Engineering, Lahore Campus, COMSATS University Islamabad, Islamabad 54000, Pakistan
Muhammad Jawad: Department of Electrical and Computer Engineering, Lahore Campus, COMSATS University Islamabad, Islamabad 54000, Pakistan
Umar Javed: Department of Electrical and Computer Engineering, Lahore Campus, COMSATS University Islamabad, Islamabad 54000, Pakistan
Khurram Shabih Zaidi: Department of Electrical and Computer Engineering, Lahore Campus, COMSATS University Islamabad, Islamabad 54000, Pakistan
Ateeq Ur Rehman: Department of Electrical Engineering, Government College University, Lahore 54000, Pakistan
Anton Rassõlkin: Department of Electrical Power Engineering & Mechatronics, Tallinn University of Technology, 12616 Tallinn, Estonia
Maha M. Althobaiti: Department of Computer Science, College of Computing and Information technology, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Habib Hamam: Faculty of Engineering, Uni de Moncton, Moncton, NB E1A 3E9, Canada
Muhammad Shafiq: Department of Information and Communication Engineering, Yeungnam University, Gyeongsan 38541, Korea

Energies, 2021, vol. 14, issue 24, 1-21

Abstract: In power systems, the programmable numerical differential relays are widely used for the protection of generators, bus bars, transformers, shunt reactors, and transmission lines. Retrofitting of relays is the need of the hour because lack of proper testing techniques and misunderstanding of vital procedures may result in under performance of the overall protection system. Lack of relay’s proper testing provokes an unpredictability in its behavior, that may prompt tripping of a healthy power system. Therefore, the main contribution of the paper is to prepare a step-by-step comprehensive procedural guideline for practical implementation of relay testing procedures and a detailed insight analysis of relay’s settings for the protection of an Extra High Voltage (EHV) auto transformer. The experimental results are scrutinized to document a detailed theoretical and technical analysis. Moreover, the paper also covers shortcomings of existing literature by documenting specialized literature that covers all aspects of protection relays, i.e., from basics of electromechanical domain to the technicalities of the numerical differential relay covering its detailed testing from different reputed manufacturers. A secondary injection relay test set is used for detailed testing of differential relay under test, and the S1 Agile software is used for protection relay settings, configuration modification, and detailed analysis.

Keywords: current transformers; current measurement; power system protection; power transformers; relays; testing (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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