| On the one hand, with the rapid development of China's economy,electricity demand obtain rapid growth.One the other hand,The city continued expansion to suburbs make the high voltage transmission lines and substions that were seen in the suburbs past appear in cities.This will enable the electromagnetic environment of cities more complex,and think that electromagnetic fields on human and the moving electrical equipment greater greatly effect.This article is about measurement and analysis of the electromagnetic field, factor of affecting the electromagnetic field and effect of the electromagnetic field on household equipment.First,this article derive the equation of the electromagnetic field ,and then analyze the main factor of affecting the electromagnetic field.From the analysis for the height of the conductor to ground,the arrangement of conductor,wire-to-phase distance and double circuit lines, The electricity sector should be appropriate to increase the height of the wire use the compact and inverse phase sequence in the design.In the actual measurement, There are two overhead transmission lines with different voltage levels and two substation as representative in this paper, respectively, the power frequency electric and magnetic fields distributed under the transmission line and inside the substation and outside the substation is being studied, according to the electromagnetic environmental assessment standards of EMF protection of transmission equipment, some feasible suggestions are put forward on how to protect the radiation especially when the high-voltage overhead lines are across the houses and who work in the substations.Due to the household electrical equipment widely used,their stability shoud be concerned when they work in the power frequency electric and magnetic fields.Observating the computer screens that work in different power frequency magnetic field,we can get the factors that can be used affecting household electrical stability. |
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