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Transient sheath overvoltages in armoured power cables

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2 Author(s)
Gustavsen, B. ; Norwegian Electr. Power Res. Inst., Trondheim, Norway ; Sletbak, J.

This paper is concerned with methods of limiting the build-up of transient voltages between sheath and armour in long armoured power cables. Calculations by a frequency dependent cable model demonstrate that this voltage can be efficiently limited to an acceptable level by introducing sheath-armour bondings at regular intervals, or by using a semiconductive sheath-armour interlayer. The paper investigates the required minimum length between bondings, as well as the required conductivity of the sheath-armour interlayer if the use of bondings is to be avoided

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Power Delivery, IEEE Transactions on  (Volume:11 ,  Issue: 3 )