This paper proposes a simple innovative formula for the calculation of the magnetic field generated by a single and a double circuit twisted three-phase power cable line. The formula results a good approximation of the rigorous analytical one and at the same time is much more accurate than the approximated formula found in literature, as demonstrated by the case of a twisted three-phase power cable used for power distribution at the medium voltage level. The effectiveness of this simple innovative formula is examined in the case of a double-circuit twisted three-phase power cable line following the ‘worst case’ approach and we propose an approximate expression for the total magnetic field generated by both twisted three-phase power cables that can be used as a diagnostic tool in fault detection algorithms, as the magnetic field can provide useful information on the phasors of the currents flowing through the conductors.

Simple calculation method of the magnetic field from double-circuit twisted three-phase cables as a tool for fault detection

MAZZANTI, GIOVANNI;LANDINI, MARCO;KANDIA, EFFROSYNI;SANDROLINI, LEONARDO
2011

Abstract

This paper proposes a simple innovative formula for the calculation of the magnetic field generated by a single and a double circuit twisted three-phase power cable line. The formula results a good approximation of the rigorous analytical one and at the same time is much more accurate than the approximated formula found in literature, as demonstrated by the case of a twisted three-phase power cable used for power distribution at the medium voltage level. The effectiveness of this simple innovative formula is examined in the case of a double-circuit twisted three-phase power cable line following the ‘worst case’ approach and we propose an approximate expression for the total magnetic field generated by both twisted three-phase power cables that can be used as a diagnostic tool in fault detection algorithms, as the magnetic field can provide useful information on the phasors of the currents flowing through the conductors.
Proceedings of 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics & Drives (IEEE SDEMPED 2011)
562
567
G. Mazzanti; M. Landini; E. Kandia; L. Sandrolini
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/106901
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