特高压直流输电线下的直流离子流电场

DC Ion Flow Field under UHVDC Transmission Lines

针对特高压直流输电导线发生电晕的情况,采取测量试验来探究直流导线产生电晕以后导线下方的离子流对地面电场的影响。通过试验,得出直流导线产生电晕以后导线下方的合成场强、标称场强、空间电荷场强分别与导线电位成线性关系,正、负极导线放电电晕情况有差异以及标称场强在合成场强中的比重随高度变化而改变等。

For the situation that the electric corona happens on UHVDC transmission lines, a measure experiment to study the effect of ion flow on the ground electric field under the DC-wire after the electric corona appearing is proposed. By the experiment, the linear relation between the total electric field strength, the nominal electric field strength, the electric field strength of space charges and wire potential separately under the DC-wire after the electric corona appearing, the differences between corona discharge of positive and negative wire, the proportion of nominal electric field strength changing in total field strength with its height are obtained.