Evaluation of Magnetic Fields inside High Voltage Substations with Different Configurations

Abstract

The exposure risk of magnetic fields produced inside high-voltage substations is still a challenging issue for both utility design engineers and biomedical researchers. There are two different types of exposure, the first type is the public type which comes from any temporary human presence near any electrical utility installation while the second type is the residential which comes from any type of residency or semi-permanent presence for more than 8 hours (working shifts) nearby any electrical utility installation. This classification is mainly dependent upon the levels and durations of exposure. This paper presents the full simulation for two typical high voltage substations of 500/220 kV and 220/66 kV with different bus bar configurations for calculating the magnetic field distributions. The effects of different bus bar configurations on the magnetic field levels are presented. The simulated results are compared with the measured values to validate the simulation accuracy.