Discussion Forum

hello everyone

What I´m trying to do is to model a magnetic field mitigation system installed in the proximities of underground three-phase power cables in flat formation, which causes the magnetic field I want to mitigate. The mitigation system is done by installing low voltage cables that form a loop. In this loop, the magnetic field I want to mitigate induces currents which create an opposite magnetic field that cancels the field generated by the power cables. To get better mitigation efficiency, the loop impedance can be compensated including a capacitor. This capacitor uses to have so large capacitance values, but can be reduce by using a multi-turn loop, as shown in my sketch (see attached file). So my model has to be an ACDC 2D (non axi) quasi-static magnetic problem with perpendicular induction currents (time harmonic analysis). Of course, skin effects must be included. Since I want to use low voltage cables with cross sections about 120mm2, I don´t think that simulate them as a single turn by adapting area/volume and current is a good choice. Also, later I would like to add thermal coupling, so it would be needed to model the insulation and protection layers that form each cable.

thank you for your help