Calculation Of Earthing And Screening Effects Of Compensation
Conductor Laid Alongside Underground Multi-cable Power Lines
Author(s)
I. Medic, M. Majstrovic & P. Sarajcev
Abstract
Calculation of earthing and screening effects of
compensation conductor laid alongside
underground multi-cable power lines
I. Medic1, M. Majstrovic2 & P. sarajcevl
I Faculty of Electrical Engineering, Mechanical Engineering
and Naval Architecture, University of Split, Croatia.
2 Energy Institute "Hwoje Poiar ", Zagreb, Croatia.
Abstract
Power substations in an urban area are interconnected by high voltage
underground power cables, resulting also in interconnections of their earthmg
grids through cable metallic screenslsheaths. Most modem power cables with
XLPE insulated core have metallic screens which are practically insulated from
ground. These screens can only be (and usually are) grounded at cable ends and
therefore do not act like extra earth electrodes extending from a station. In thls
case, almost the same positive earthing effects of an extended electrode can be
obtained only by extending an auxiliary wire in the same trench and routing it
closely parallel to the power line. This bare
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