ПОВЫШЕНИЕ ЭЛЕКТРОБЕЗОПАСНОСТИ СЕТИ 10/0,38 кВ ЗА СЧЕТ УТОЧНЕНИЯ УСТАВОК УСТРОЙСТВ ЗАЩИТЫ ПРИ ОБРЫВЕ ПРОВОДА ВОЗДУШНОЙ ЛИНИИ 10 кВ

A.V. Khlopova; A.N. Gorozhankin

doi:10.14529/power240111

Authors

A.V. Khlopova South Ural State University
A.N. Gorozhankin South Ural State University

DOI:

https://doi.org/10.14529/power240111

Keywords:

broken wire, 10 kV overhead line, negative sequence voltage, setting of protection device, electrical safety

Abstract

Translator

A wire break is a common accident in distribution networks operating with an isolated neutral. Failure to shut down such an emergency situation results in a risk of electric shock. For proper operation of protection devices in the event of a wire break, it is necessary to select the correct setting of the information parameter. It is known that the negative sequence voltage can serve as such a parameter. The paper presents the results of studies of the influence of various operating modes of the 10/0.38 kV electrical network (both emergency and normal) on negative sequence voltage changes. The influence of the fault location and the parameters of the 10/0.38 kV network on the negative sequence voltage was also studied in order to clarify the negative sequence voltage setting for protection devices that respond to a wire break in the 10 kV overhead line. This will allow minimizing false alarms and increasing electrical safety in the 10 kV network.

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Author Biographies

A.V. Khlopova, South Ural State University

Translator

A.N. Gorozhankin, South Ural State University

Translator

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