MATHEMATICAL CALCULATION OF ELECTROMAGNETIC FIELD IN HIGH VOLTAGE SUBSTATIONS TO TREATMENT ITS EFFECT ON THE PROTECTIVE EQUIPMENTS

It's not economically to design and manufacture costly high voltage equipment's that is fail service at small fault or any abnormal condition in power system, so by using the protective equipment's will be restrict danger for human life and high voltage equipment's. In another hand the protective equipment's should be provide fast, reliable localizes faults, and selectivity. Electric and magnetic fields are much better to understood and documented despite the large number of studies and their increasing quality, researchers have been show that EMFs have effect on the protective equipment's, either in the high voltage substations. The purpose of study electric and magnetic fields in substations to treatment the affection of the field on the protective equipment's, overcome its impact on the protection devices. This paper presents a study of the electromagnetic fieldin high voltage substation 500kV overhead transmission line, and explicitly shows how the fields vary under high voltage lines by employing easily understood mathematical models, this methods use 2D free space case study results of a 500kV alternating current overhead transmission line and treatment to overcome the affection of the electromagnetic field on the protective equipment.