Modeling phase-to-ground faults in 6kW grids in open pit mining

MATLAB Simulink-based modeling of phase-to-ground faults, common in power grids with insulated (or earthed via high-ohm resistor) generator neutral, has been performed. The model power grid contained: a substation with 35/6.3 kW transformer and switchgear; a power line composed of an overhead line branch and an inserted cable connected via a switching station; and the current-using equipment represented by power shovel ESH-10/70. The MATLAB Simulink-modeled blocks of these elements allow modeling phase-to-ground faultsfor various (possible) configurations of a power grid. The oscillograms of transient phenomena and the effective values of currents of phase-to-ground faults are obtained for the elements of the power grid in case of faults at the substation and in the shovel cable. The principles and provisions of the models are reported. The implemented modeling can provide parameters of phase-to-ground fault currents for validation of the selected ground fault protection and the protection operation setting for power grids in open pit mining.

Keywords: modeling, power grids, insulated neutral, ground fault, MATLAB Simulink, transformer, resistor, current-using equipment.
For citation:

Lyakhomskiy A. V., Gerasimov A. I., Perfil’eva E. N. Modeling phase-to-ground faults in 6kW grids in open pit mining. MIAB. Mining Inf. Anal. Bull. 2021;(2):164-178. [In Russ]. DOI: 10.25018/0236-1493-2021-2-0-164-178.

Acknowledgements:
Issue number: 2
Year: 2021
Page number: 164-178
ISBN: 0236-1493
UDK: 621.316.11:622.33
DOI: 10.25018/0236-1493-2021-2-0-164-178
Article receipt date: 29.09.2020
Date of review receipt: 05.11.2020
Date of the editorial board′s decision on the article′s publishing: 10.01.2021
About authors:

A.V. Lyakhomskiy1, Dr. Sci. (Eng.), Professor, Head of Chair,
A.I. Gerasimov1, Cand. Sci. (Eng.), Assistant Professor,
E.N. Perfil’eva1, Assistant Professor,
1 National University of Science and Technology «MISiS», 119049, Moscow, Russia.

 

For contacts:

A.I. Gerasimov, e-mail: mggu.eegp@mail.ru.

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