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

IMPROVEMENT IMPLEMENTATION METHODS OF RELAY BUSBARS PROTECTION OF SWITCHGEARS

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,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
* 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
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