| With the developments of economy and the continuous extending of the cities, some electric constructions have been surrounded by populous towns. The attention of surrounding inhabitants and local governments to the electromagnetic radiation of these constructions has arisen, So, it is necessary to analyze the power frequency electric and magnetic field around high voltage transmission lines and substations. In addition, State Grid now promotes the typical design of transmission and distribution projects, to analyze and study the typical design of the future electromagnetic environment will benefit construction and operation of these equipments.The electromagnetic effects of power transmission equipments includes: power frequency electric field, power frequency magnetic field, radio interference and audible noise. This paper made detail simulation research on the power frequency magnetic field. Firstly, the paper described the status of power frequency electromagnetic fields of the HV transmission and its effects on health, and then calculated the power frequency magnetic field intensity of the typically designed HV transmission.The paper studied the calculation method of the power frequency magnetic field intensity of the typically designed transmission. The mean of the numerical value calculation was based on the Biot Savart law: The magnetic field at any location generated by any line can be calculated. Then using superposition theorem, magnetic field distribution generated by all the equipments can also be figured out. With the Matlab's strong figure drawing function, the magnetic induction density above a plane can be output. The results of this paper can be useful for the construction of the HV transmission... |
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