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Fault current distribution in HV cable systems

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2 Author(s)
Viel, E. ; Sch. of Eng., Cardiff Univ., UK ; Griffiths, H.

An advanced analytical model is presented for the evaluation of ground return currents at substations fed by both three and single-core cable circuits. The circuit model includes the accurate treatment of an intermediate substation between the source and the faulted substation, unlike Engineering Recommendation EA S.34, which adopts a more simplified approach. Through detailed parametric studies, the differences between the simplified and the more accurate treatment are quantified. The effects that variations in the key parameters-cable length and type, substation earth impedances have on the magnitude of the ground return current are identified and explained

Published in:

Generation, Transmission and Distribution, IEE Proceedings-  (Volume:147 ,  Issue: 4 )