Simulations of ELF magnetic shields

This paper describes a multistage algorithm for efficient calculation of magnetic flux contours, for optimizing the design of structural magnetic shielding. It is part II of the article presented in Pekar and Netzer (2006). The Environmentalist. The multi-stage algorithm enables albeit medium-power computer system to calculate the effect of shielding materials with a given geometry, in a reasonable timeframe without compromising precision. The outcome results are a large number of electrical utility models and the best cost-effective shielding materials and geometries for ELF magnetic flux reduction per Authority regulations and requirements. This article reviews methods and principles for calculation of an extremely low frequency (50/60 Hz) electromagnetic field originating from power utilities and power lines, for the purpose of constructing efficient magnetic shielding. The paper points out difficulties in existing methods and proposes a new algorithm for analysis and construction of magnetic shielding.