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DOI: https://doi.org/10.15407/techned2017.06.061

IMPROVEMENT IMPLEMENTATION METHODS OF RELAY BUSBARS PROTECTION OF SWITCHGEARS

Journal Tekhnichna elektrodynamika
Publisher Institute of Electrodynamics National Academy of Sciences of Ukraine
ISSN 1607-7970 (print), 2218-1903 (online)
Issue No 6, 2017 (November/December)
Pages 61 – 71

 

Authors
V. Nitsenko1*, D. Kulagin2**
1 – GP "NEC "Ukrenergo" Dnipro ES,
str. Hrebelna, 2, Zaporizhzhia, 69096, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
2 – Zaporozhye National Technical University,
str. Zhukovskoho, 64, Zaporizhzhia, 69063, Ukraine,
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* ORCID ID : http://orcid.org/0000-0002-3450-7649
** ORCID ID : http://orcid.org/0000-0003-3610-4250

 

Abstract

The article analyzes all disadvantages of differential busbar protection and known methods of possible realization of their phase-differential protection. The authors improved more advanced methods for comparing current phases by phase-differential busbar protection, in particular, logical operations for each proposed method are given, including verification conditions that are required to ensure reliable start and trip from protection when identifying the emergency condition of internal fault, and also illustrations of the protection oparation are given when using each of these methods in case of internal and external faults. The choice of the most expedient method for comparing the currents phases for its subsequent implementation by the phase-differential protection device was made on the basis of building their comparative characteristics based on the results of theoretical and practical studies of the protection operation in emergency conditions. Conclusions were made about the advantages of using the proposed phase-differential algorithm of relay busbar protection operation. References 10, figures 5, table 1.

 

Key words: relay protection, phase-differential busbar protection, phase comparison relay, block angle, methods of comparison currents phases.

 

Received:    28.10.2015
Accepted:    30.08.2017
Published:   30.10.2017

 

References

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3. Nicenko V.V., Kulagin D.O., Makhlin P.V., Klimko A.N. Investigations of main counted parametrs of differential-phase busbars protection and factors of power grid, which influences for its setting. Elektrotekhnika i Elektroenergetika. 2015. Vypusk 2.  Pp. 87–94. (Rus)

Available at: http://journal.zntu.edu.ua/et/files/ET22015/ET(2)_2015.pdf
4. Nicenko V.V., Kulagin D.O. Investigation methods of implementation measurement circuits of busbar’s protection system. Elektrotekhnichni ta kompiuterni systemy. 2017. Vypusk 24 (100). Pp. 28–38. (Ukr)

Available at: http://www.etks.opu.ua/?fetch=articles&with=topic&id=24.
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9. Gajic Zoran., Hamdy Faramawy, Li He, Klass Koppari, Lee Max. Modern design principles for numerical busbar differential protection. Relay protection and automation for electric power systems, April 25–28, 2017.  Saint-Petersburg, 2017. Pр. 1–16.
10. Nitsenko V.V., Kulagin D.O. Investigation of operation of differential-phase protection of busbars system voltage of 110-750 kV. Scientific Bulletin of National Mining University. 2017. No 4. Pp. 60–67.