Investigation of the Effects of the Arc Fault Resistance and Transient Resistance on the Overcurrent Ground Relay Protection Setting in Medium Voltage Electrical Power Lines

Keywords: medium voltage, phase to ground faults, earth relay protection

Abstract

In the medium voltage electrical power lines, the most common fault is the phase to ground fault. The determining factors for selection of the neutral grounding mode of the medium voltage electrical power lines are the selectivity of the relay protection, the transient voltages during phase to ground fault, the magnitude of the fault currents, etc. The paper studies the influence of the transient resistance of phase to ground fault on the selectivity and sensitivity of the earth fault protection when the neutral of the power transformer is grounded through active resistance in medium voltage power grids.

References

Shabad, M. A. (2002). Protection against single-phase short circuits to earth in 6-35 kV networks. Sank Petersburg
 
Shabad, M. A. (2004). Grounding modes have not neutralized and protection against earth faults in 6-35 kV networks of Russia. International Scientific and Technical Conference, Issue 3, Minsk, p. 337-342.
 
Etarski, S.I. (1994). Electrical part of power plants. Sofia, Technology.
 
Yordanova, M., Vasileva, M., Dimitrova, R., Ivanova, M. (2016), A methodology for deter-mining the maximum touch voltage in the grounding grids considering the impulse resistance. 19th International Symposium on Electrical Apparatus and Technologies, SIELA 2016, pp. 376-379.
Crossref
 
Ministry of Energy. (2015). Ordinance № 3 Regarding the construction of electrical switchyards, switch-gears and power lines. Retrieved from http://www.gli.government.bg/page.php?c=34&page=8 (in Bulgarian)
 
Ministry of Energy. (2015). Ordinance № 16-116 for the technical operation of energy equip-ment. Retrieved from http://www.gli.government.bg/page.php?c=34&page=8 (in Bulgarian)
 
Avramov, N. A. (1986). Fundamentals of Relay Protection. Sofia, Technology.
 
Andreev, S. (2005). Relay Protection. Varna.
 
Vichev, S., Todorova, A. et al.(1998). Energy Directory. Sofia, ABS Engineering, vol. 4
 
Domeland, V. (1981). Handbook of Relay Protection, Engineering.
 
Fedoseev, A. M. (1976). Relay Protection of the Electric Power Systems. Moskow, Energy
 
TSO LTD. Bulgaria Instruction for organization of relay protections and calculation of their set-tings in the medium voltage distribution networks. in Bulgarian


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Published
2020-06-30
How to Cite
Stanchev, P., & Mehmed-Hamza, M. (2020, June 30). Investigation of the Effects of the Arc Fault Resistance and Transient Resistance on the Overcurrent Ground Relay Protection Setting in Medium Voltage Electrical Power Lines. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, 4(1), 67-72. https://doi.org/10.29114/ajtuv.vol4.iss1.172
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