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Research on effect of differential-phase protection of busbars system with voltage of 110‒750 kV

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Category: Electrical Complexes and Systems

Last Updated on 06 September 2017

Published on 06 September 2017

Hits: 4023

Authors:

V.V.Nitsenko, SE “NPC “Ukrenergo” Dniprovska PS, Zaporizhzhia, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.O.Kulahin, Cand. Sc. (Tech.), Assoc. Prof., Zaporozhye National Technical University, Zaporizhzhia, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. The choice of the optimal method from the technical point of view of implementing the algorithm for comparing the phases of the feeder currents in differential-phase protection of busbar systems with voltage of 110‒750 kV.

Methodology. During the studies methods of mathematical modeling and simulation of steady and transient external and internal short circuits were used to analyze the behavior of the reacting organ of differential-phase busbar protection. The empirical method was implemented for studying the functioning of the technology of the differential-phase busbar protection, as well as the comparative analysis method to select the most perfect method for operating protection algorithm.

Findings. There were received oscillograms of steady and transient conditions of the power system, the action or no-action of differential-phase busbar protection was fixed, particularly, the time of the action and the time of trip of circuit breaker in condition with short circuit within the protected area were fixed. Conclusions about the appropriateness of application of each of the developed methods of implementation the differential-phase busbar protection have been made. According to the obtained results of comparative characteristic the most optimal option was proposed for use.

Originality. For the first time, a model of differential-phase protection of busbars was developed and investigated, in which the principle of comparing the phase of the feeder currents was used as the main and only way to ensure the absolute selectivity of the action of this protection, which led to conclusions about the possibility of its application and the effectiveness of the action. The effectiveness of the implementation of the technical solution for the implementation of this tire protection system is confirmed by the results obtained from its simulation and practical tests using the test complex of the microprocessor protection laboratory of the Dniprovska Power System.

Practice value. From the technical point of view the optimal way to implement the functional algorithm of the reacting part of the differential-phase busbar protection is chosen which can be used to develop advanced algorithms for the operation of the device.

References.

1. Kireieva, E.R., 2014. Relay protection and automation of electrical power systems. Moscow: Akademiia.

2. Chernobrov, N.V., 2013. Relay protection. 4th ed. Moscow: Kniga po trebovaniiu.

3. Minpalyvenerho of Ukraine, 2015. Relay protection Capter 3.2. In: The rules of electrical installation organization. Kyiv, Ministry of Energy and Coal Mining of Ukraine.

4. Nitsenko, V.V., 2015. Prospects differential-phase principle to protect busbar system switchgears 110‒750 kV. Electromehanicheskie i energosberigaushie sistemi, 3, pp. 158‒166.

5. Rumiantsev, Yu.V., 2016. Integrated model for the study of the functioning of digital differential protection of power transformer. Energetika. izv. vyissh. ucheb. zavedeniy i energ. ob’edineniy SNG, 3(59), pp. 203‒224.

6. Nitsenko, V.V., 2016. Investigations of current transformer’s errors in relay protection systems during steady and transient conditions of power grid. Electrotekhnika i electroenergetika, 2, pp. 37‒58.

7. Andreiev, M.V., 2013. Optimization of transformers differential protection settings with its adequate mathematical models. Sovremennyie problemyi nauki i obrazovaniya, 3, pp. 1‒9.

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