A novel three-dimensional integral method is used in order to assess the effectiveness of thin conducting screens for reducing stray magnetic fields. Integral formulations are particularly suited for shielding problems, as computing costs are reduced compared to commercial codes, relying mainly on the Finite Element Method. A conducting screen for a MV/LV substation is designed by means of the developed code. Measured and computed values of the rms magnetic flux density in proximity of the substation are compared in order to test the accuracy and the reliability of the numerical analysis.
Three-dimensional modelling of extremely low frequency thin conducting screens
ALOTTO, PIERGIORGIO;GUARNIERI, MASSIMO;MORO, FEDERICO;TURRI, ROBERTO
2008
Abstract
A novel three-dimensional integral method is used in order to assess the effectiveness of thin conducting screens for reducing stray magnetic fields. Integral formulations are particularly suited for shielding problems, as computing costs are reduced compared to commercial codes, relying mainly on the Finite Element Method. A conducting screen for a MV/LV substation is designed by means of the developed code. Measured and computed values of the rms magnetic flux density in proximity of the substation are compared in order to test the accuracy and the reliability of the numerical analysis.
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