DOI: https://doi.org/10.15407/publishing2017.47.016

ANALYSIS OF THE PRECONDITIONS OF SF6 CIRCUIT BREAKERS’ DAMAGE IN 750 KV ELECTRIC NETWORKS

V.G. Kuznetsov, Yu.I. Tugai, O.G. Shpolyansky
Institute of Electrodynamics of the National Academy of Sciences of Ukraine,
Peremohy, 56, Kyiv-57, 03680, Ukraine,
е-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

To improve performance reliability of SF6 circuit breakers, an analysis of the possible reasons for their failure, which cannot be detected by traditional monitoring, was performed. As an example, a development of the situation, which led to SF6 circuit breaker damage at "Pivnichnoukrainska" 750kV-substation, was considered. Based on the records received from "REGINA" recorder, the analysis of operating parameters preceding the damage was performed. Matlab/Simulink environment was used to develop a digital model and simulate switching transient phenomena in 750kV transmission lines of "Pivnichnoukrainska-Kurska APS". Potentially hazardous operating conditions for SF6 circuit breakers were identified and recommendations for their prevention were given. References 5, figures 5, tables 4.
Key words: SF6 circuit-breaker, switching, turning on, insulating capacity.

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