单极高压直流输电线路电场强度计算

Electric field intensity calculation of unipolar high voltage direct current transmission lines

通过改进Sarma计算方法和引入分裂导线的作用,运用解析法计算了高压直流输电线路的电场强度,并分析了线路几何参数的影响.结果表明,电场强度随距导线距离的增加而急剧衰减,地面最大电场强度位于导线垂直投影处.次导线半径和导线对地高度对电场强度的影响较明显,次导线半径越大,导线越高,电场强度则越小.次导线布置形式和导线分裂间距对电场强度的影响很小.在不同次导线半径下,最大电场强度与运行电压呈近似线性关系.在不同导线对地高度下,最大电场强度与运行电压呈发散状的非线性关系.将解析法计算结果和有限元法计算结果进行比较,两者吻合较好.

Sarma method was improved by introducing bundled conductors and then used to calculate the electric field intensity generated by unipolar high voltage direct current(HVDC) transmission lines,and the influences of configuration parameters were also analyzed.The electric field intensity attenuates rapidly with the increasing distance from the polar line,and the maximum electric field intensity is at the projection of the transmission line.The sub-conductor radius and the transmission line height substantially...