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:
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2 – Zaporozhye National Technical University, str. Zhukovskoho, 64, Zaporizhzhia, 69063, Ukraine, e-mail:
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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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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. 5. The rules of electrical. Head 3.2. Relays protections. Kharkov: Fort, 2009. 704 p. (Rus) 6. Collection of guidance materials main technical management USSR Ministry of Energy. Moskva: Energo-atomizdat, 1985. 304 p. (Rus) 7. Technical policy of SE "NEC" Ukrenergo" in the field of development and operation of trunk and interstate electric networks. Kyiv: Ukrenerho, 2017. 76 p. (Ukr) 8. Distributed busbar protection REB500 including line and transformer protection: Operating instruction. Baden: ABB Switzerland Ltd, 2011. 65 p. 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.
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