采用BEM计算高压变电站工频电场

高压变电站内的工频电场的计算与评测日益重要。采用BEM法对一500 kV变电站500 kV开关场区域的设备与母线产生的工频电场进行了计算。采用BEM计算变电站内母线以及开关场设备产生的工频电场时,可以避免采用FEM计算时的三维剖分,计算结果表明,变电站内设备在周围产生的电场强度与其顶部的母线的高度有关,电场强度的大小分布规律与母线的高度规律基本一致。直流条件下计算的电场分布较交流条件下的要大,因此在计算变电站内工作走廊内的电场强度,对于设备以及母线的场源参数应按交流进行设置。

Calculation of Power-Frequency Electric Fields at HV Substations by BEM

Calculation and evaluation of power-frequency electric fields at HV substations is becoming daily more important.This paper calculated the power-frequency electric fields derived from the electrical equipments and bus bars of the 500 kV switchyard at a 500 kV substation by BEM,which can avoid the three-dimensional split in the FEM calculation.The calculation results show that the electric-field intensity around the electrical equipments at the substation has connection with the heights of their top bus bars,and that the distribution of the electric-field intensity is basically in accordance with the height of bus bars.The parameters of filed source of the electrical equipments and bus bars should be set according to AC configuration during the calculation of electric-field intensity at substation working corridor,because the calculated electric-field intensity in DC condition is bigger.than that in AC condition.