THE IMPROVEMENT OF RELAY PROTECTION SCHEMES RELIABILITY ESTIMATION METHOD

Authors

  • V. V. Litvinov Zaporizhia State Engineering Academy, Ukraine
  • Ya. S. Sachenko Zaporizhia State Engineering Academy, Ukraine

DOI:

https://doi.org/10.15588/1607-6761-2015-1-11

Keywords:

reliability, relay protection, probability, fault, technical state, fault tree

Abstract

In paper the fault tree method for the relay protection scheme reliability estimation at the time interval is improved. The improved method can be used as input information of the following values: the averaged reliability indexes of equipment, the statistical functions of relay scheme elements of fault probability distribution and the modified statistical functions of relay scheme elements of fault probability distribution. The improved fault tree method is possible to apply both for the comparison estimations and for the risk-management problem solution. In practical part of the paper the comparison of reliability analysis of relay schemes with electromechanical relays and digital relays is presented. The obtained results show that the reliability of modern digital relay schemes is less than the reliability of electromechanical relay schemes. Also, in paper the quantity estimation of 6 kV network current protection fault probability is obtained by using the statistical functions F(t)

Author Biographies

V. V. Litvinov, Zaporizhia State Engineering Academy

PhD, Associate Professor of Hydro Power Department

Ya. S. Sachenko, Zaporizhia State Engineering Academy

Master Student of Hydro Power Department

References

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How to Cite

Litvinov, V. V., & Sachenko, Y. S. (2015). THE IMPROVEMENT OF RELAY PROTECTION SCHEMES RELIABILITY ESTIMATION METHOD. Electrical Engineering and Power Engineering, (1), 62–69. https://doi.org/10.15588/1607-6761-2015-1-11

Issue

No. 1 (2015): Electrical Engineering and Power Engineering

Section

Electroenergetics

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Copyright (c) 2017 V. V. Litvinov, Ya. S. Sachenko

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