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Jesteś gościem nr:
532551
   

Szczegóły artykułu:

Wydawnictwo: Academic Journals Poznan University of Technology

Numer: 98/2019 Str: 65


Autorzy: Michał Gajdzica, Jurij Warecki


Tytuł: MODELING TRANSIENTS IN MV RESONANTLY GROUNDED INDUSTRIAL GRID DURING SINGLE LINE TO GROUND FAULTS


Streszczenie: 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


Słowa kluczowe: electrical grid, grounding methods, transients overvoltage, transient intermittent faults.


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