Innovative calculation methods of the magnetic field from single and double-circuit twisted three-phase cables widely used in MV and LV installations

2012 ◽  
Vol 2 (2) ◽  
Author(s):  
Giovanni Mazzanti ◽  
Marco Landini ◽  
Effrosyni Kandia ◽  
Cesare Biserni ◽  
Massimo Marzinotto
Keyword(s):  
Magnetic Field ◽  
Power Distribution ◽  
Approximate Expression ◽  
Power Cable ◽  
Cable Line ◽  
Worst Case ◽  
Medium Voltage ◽  
Three Phase ◽  
Worst Case Approach ◽  
The Magnetic Field

AbstractThis 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 some cases of a twisted three-phase power cable used for power distribution at the medium voltage level. The effectiveness of this simple innovative formula is also examined in the case of a double-circuit twisted three-phase power cable line following the’ worst case’ approach and concluding at proposing an approximate expression for the total magnetic field generated by both twisted three-phase power cables.

scholarly journals MAGNETIC FIELD SHIELDING OF UNDERGROUND POWER CABLE LINE BY H-SHAPED SHIELD

2020 ◽  
Vol 2020 (6) ◽  
pp. 15-20
Author(s):  
I.M. Kucheriava ◽  
Keyword(s):  
Magnetic Field ◽  
Low Carbon Steel ◽  
Power Cable ◽  
Low Carbon ◽  
Shielding Effectiveness ◽  
Cable Line ◽  
Three Phase ◽  
Underground Power Cable ◽  
Extra High Voltage ◽  
The Magnetic Field

In the article the magnetic field distributions, generated by underground extra-high voltage (330 kV) three-phase power cable line in the environment, in particular near the cables in the trench and on the ground, are analyzed for using of H-shaped shield made of different materials including aluminum, low carbon steel and non-oriented grain steel. As shown, the best shielding effectiveness is realized by aluminium shield. The H-shaped shield made of high-conducting non-magnetic materials is proposed to use in order to mitigate the magnetic field level on the ground down to regulated nonhazardous values. References 14, figures 7.

scholarly journals STUDY OF THE MAGNETIC FIELD OF THREE PHASE LINES OF SINGLE CORE POWER CABLES WITH TWO-END BONDING OF THEIR SHIELDS

2015 ◽  
Vol 0 (4) ◽  
pp. 56-61 ◽  
Author(s):  
V. Yu. Rozov ◽  
A. A. Kvytsynskyi ◽  
P. N. Dobrodeyev ◽  
V. S. Grinchenko ◽  
A. V. Erisov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Power Cables ◽  
Three Phase ◽  
The Magnetic Field

scholarly journals THE MAGNETIC FIELD OF UNDERGROUND 330 KV CABLE LINE AND WAYS FOR ITS REDUCTION

2019 ◽  
Vol 2019 (5) ◽  
pp. 3-9 ◽  
Author(s):  
A.A. Shcherba ◽  
◽  
A.D. Podoltsev ◽  
I.M. Kucheriava ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cable Line ◽  
The Magnetic Field

Rheology and Behavior of Magnetic Fluids in Alternating/Rotating Magnetic Fields

2003 ◽  
Author(s):  
Carlos Rinaldi ◽  
Xiaowei He ◽  
Adam Rosenthal ◽  
Thomas Franklin ◽  
Cory Lorenz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Fluids ◽  
Rotating Magnetic Fields ◽  
Magnetic Field Rotation ◽  
Three Phase ◽  
Field Rotation ◽  
And Behavior ◽  
The Magnetic Field ◽  
Cylindrical Test

The rheology and behavior of magnetic fluids in the presence of time-varying magnetic fields is illustrated through three sets of experiments. The first involves measurements of ferrofluid torque on a cylindrical spindle under applied uniform rotating magnetic fields. We measure the torque required to restrain a stationary cylindrical test wall in contact with aqueous ferrofluids subjected to the rotating uniform magnetic field generated by a three-phase AC 2-pole motor stator winding. The torque is found to scale linearly with volume, and to be a function of the applied magnetic field amplitude, frequency and direction of rotation. Measurements show that for ferrofluid entirely inside the cylindrical test wall the torque points in the same direction as the magnetic field rotation pseudovector, whereas for ferrofluid entirely outside the cylindrical wall the torque points in the direction opposite to the field rotation pseudovector. The second set of experiments explores the formation of ordered ferrofluid structures in the gap of a Hele-Shaw cell subjected to simultaneous vertical DC and in-plane horizontal rotating magnetic fields. Finally, the third set of experiments illustrates the effect of applied DC fields on the shape of ferrofluid jets and sheets.

scholarly journals Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

2019 ◽  
Vol 28 ◽  
pp. 01007
Author(s):  
Dariusz Kusiak ◽  
Tomasz Szczegielniak ◽  
Zygmunt Piątek
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Proximity Effect ◽  
Eddy Currents ◽  
Skin Effect ◽  
High Current ◽  
Current Frequency ◽  
Three Phase ◽  
The Magnetic Field ◽  
Outer Area

The article shows the total magnetic field distribution in two outer conductors of the flat, three-phase single-pole shielded, high-current busduct is asymmetric. The phase currents in the shielded conductors decide about the magnetic field of such a high-current busduct. The components of this field reflect the magnetic field of the reverse reaction fields of the eddy currents induced in the conductors of the adjacent phases as the results of the proximity effect and the skin effect. The field distribution is shown in the outer area of the outer phases as the function of the parameters reflecting the current frequency, the conductivity, and the transverse dimensions of the tubular conductors.

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