Analysis of Measures that Exclude the Non-Selective Actions of Differential Collecting Busbar Protection in External Two-Phase Short Circuits with the Saturation of Current Transformers Included in Fault-Free Phases

被引：0

作者：

Kuzhekov S.L. ^{[1
]}

Degtyarev A.A. ^{[1
]}

Doni N.A. ^{[2
]}

Kostarev L.N. ^{[2
]}

Fedotov A.Y. ^{[2
]}

机构：

[1] NPF Kvazar, Novocherkassk

[2] EKRA Research and Production Enterprise Ltd, Cheboksary

来源：

Power Technology and Engineering | 2020年 / 53卷 / 06期

关键词：

current transformer; differential busbar protection; fault-free phase; neutral conductor; saturation time; short circuit; time delay; transient response;

D O I：

10.1007/s10749-020-01149-3

中图分类号：

学科分类号：

摘要：

An analysis is made on the non-selective actuation of the differential protection of busbars with a voltage of 110 kV of an electrical distribution system substation in the transition mode of an external two-phase short circuit. The protection effect is found to be due to the saturation of the transformer cores of class P current included in fault-free phases. Methods are also analyzed to ensure the correct operation of protection in the considered mode, and methods for calculating the protection parameters at which these methods are workable are proposed. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

引用

页码：737 / 744

页数：7