| Issue |
MATEC Web Conf.
Volume 212, 2018
2018 International Scientific Conference “Investment, Construction, Real Estate: New Technologies and Special-Purpose Development Priorities” (ICRE 2018)
|
|
|---|---|---|
| Article Number | 01035 | |
| Number of page(s) | 5 | |
| Section | New materials, Structures and Technologies for Construction in Specific Conditions of Siberia and the Far East | |
| DOI | https://doi.org/10.1051/matecconf/201821201035 | |
| Published online | 15 October 2018 | |
Bias signal control in differential protection
Orenburg State University, 460018, Pobedy Ave., 13, Orenburg, Russia
* Corresponding author: prigozhins@mail.ru
The problem is to ensure the stability of the differential protection functioning at deep saturation of the cores of electromagnetic current transformers. The errors of current transformers support the greatest influence on the operation of differential protections. Features of the differential protection operation at deep saturation of current transformers in short-circuit transient modes are considered. Comparison results of various algorithms for the formation of a bias signal are given. The control capability of the bias signal generation algorithm was analyzed. The harmonic composition of the differential current on the mathematical model of two-arm differential protection in the transient mode with external and internal short circuits at saturation of the current transformers of one arm was investigated. The stability of the differential protection functioning can be enhanced by the selectivity of the bias signal generation algorithm. A bias signal control criterion using a relative level of higher harmonics to a differential signal was proposed.
© The Authors, published by EDP Sciences, 2018
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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