Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen

Aleksandra Schött-Szymczak and Krzysztof Walczak
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Aleksandra Schött-Szymczak: Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Krzysztof Walczak: Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland

Energies, 2020, vol. 13, issue 7, 1-14

Abstract: Changing the connection type of a medium voltage (MV) cable screen is linked to a decrease in power loss, although it may also lead to the generation of overvoltage in a metallic cable screen, which is hazardous for proper cable line work. In this paper, results of simulation and field researches are presented, showing the range of voltages that occurs in cable screens during single-phase ground fault. There are considered to be three scenarios according to the applied type of cable screen connection. Conducted researches allow the comparison of chosen methods of simulation with an actual outcome. Results obtained during simulation and field studies lead to the conclusion that the range of overvoltage occurred in a cable screen could in fact be dangerous for the cable line’s sheath insulation without proper overvoltage protection.

Keywords: metallic cable screen; power losses reduction; overvoltage; computer simulation; field research (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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