Calculation of magnetic shielding of a substation at power frequency using FEM
- 1 July 1994
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Delivery
- Vol. 9 (3), 1398-1405
- https://doi.org/10.1109/61.311168
Abstract
The finite element method (FEM) is used for analyzing the shielding effectiveness of an eddy current shield applied to a 10/0.4 kV substation. The influence of the shield extension is studied, and a calculated magnetic field attenuation of 30 dB is obtained for a 5 mm aluminum shield applied on the ceiling and the walls. With a 3D model, the eddy current distribution in the shield is studied, giving guidance for door positioning. Here, the insertion of a door in the shielded wall off the paths of the main eddy currents is found to create only a locally elevated magnetic field. With a simplified 2D model, the influence of shield conductivity is also analyzed. An increase of the conductivity over that of aluminum here gives a limited shielding improvement.<>Keywords
This publication has 3 references indexed in Scilit:
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