OVERVOLTAGE DURING ARC SINGLE-PHASE EARTH FAILURES IN 35 KV ELECTRICAL NETWORKS

Author:

Seheda M.S.ORCID, ,Ravlyk O.M.ORCID,Bakhor Z.M.ORCID,Yatseyko A.Ya.ORCID, , ,

Abstract

The results of the study of overvoltages during arc single-phase earth faults of intermittent nature in the 35 kV electric network with isolated neutral are presented. Computer simulations of transients in the electrical network have obtained the maximum multiplicities of overvoltages at the point of occurrence of single-phase arc earth faults, which exceed theoretically expected according to known theories of the occurrence and development of overvoltages. The change of the overvoltage level on the 35 kV busbars of the network substations, electrically connected to the place of occurrence of the single-phase earth fault, and the influence of the cable line on the overvoltage multiplicity are shown. Ref. 12, fig. 3, table.

Publisher

National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)

Reference12 articles.

1. Rules of arrangement of electrical installations. The publication is official. Ministry of Energy and Coal Industry of Ukraine. Kharkiv: Fort Publishing House, 2017. 760 p. (Ukr)

2. Belyakov N.N. Investigation of overvoltage at arc earth faults in 6 and 10 kV networks with isolated neutral. Elektrichestvo. 1957. No 5. Pp. 31-36. (Rus)

3. Likhachev F.A. Earth faults in networks with isolated neutral and capacitive current compensation. Moscow: Energiya, 1971. 152 p. (Rus)

4. Sabarno L.R., Koshman V.I., Sevastyuk I.M. Investigation of arc overvoltages in the case of single- and two-phase earth faults in a distribution network with isolated neutral. Energy and computer-integrated technologies in agriculture. 2017. No 1 (6). Pp. 17-21. (Ukr)

5. Varetsky Y., Bakhor Z., Ravlyk O. Transients in 10-35 kV electric networks with ungrounded neutrals under earth faults. Proc. of VII Int. Symp. Short Circuit Currents in Power Systems, Warsaw, 1996. Pp. 1.20.1-1.20.4.

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1. Дугові перенапруги у змішаній повітряно-кабельній електричній мережі 35 кВ;Журнал електроенергетичні та електромеханічні системи;2023

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