Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen
[ 1 ] Instytut Elektroenergetyki, Wydział Inżynierii Środowiska i Energetyki, Politechnika Poznańska | [ P ] employee
2020
scientific article
english
- metallic cable screen
- power losses reduction
- overvoltage
- computer simulation
- field research
EN 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.
1821-1 - 1821-14
article number: 1821
CC BY (attribution alone)
open journal
final published version
at the time of publication
public
140
140
3,004