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Article

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Title

Modeling transients in MV resonantly grounded industrial grid during single line to ground faults

Authors

Year of publication

2019

Published in

Poznan University of Technology Academic Journals. Electrical Engineering

Journal year: 2019 | Journal number: Issue 98

Article type

scientific article

Publication language

english

Keywords
EN
  • electrical grid
  • grounding methods
  • transients overvoltage
  • transient intermittent faults
Abstract

EN Medium voltage distribution power grids mostly operate with ungrounded neutral points of transformer. The philosophy about these power supply systems based on the assumption that the electrical grid is more reliable. However the practice of operation showed that currents of single phase or multiple faults to ground depend mostly on the earth capacitances of cables connected to power grid and configuration and structure in relation to the main substation buses. Moreover, this kind of arcing ground faults on the ungrounded system causes transient overvoltages several times than nominal value. In the consequence, it may be dangerous for the electrical devices connected to the power system. The article focuses on the transient impact the equipment insulation due to faults in the middle voltage industrial grid with adjustable speed drives. The examination results of transient voltages across the system was presented. The Matlab/ Simulink Software was used to modeling system behavior during intermittent faults.

Pages (from - to)

65 - 75

DOI

10.21008/j.1897-0737.2019.98.0006

Presented on

Computer Applications in Electrical Engineering 2019, 15.04.2019, Poznań, Polska

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public

Ministry points / journal

5

Ministry points / journal in years 2017-2021

5

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