混合交、直流输电线路下方地面电场分布分析

Analysis for ground electric field distribution under hybrid AC and DC transmission lines

针对高压交流、高压直流输电线路位于同一走廊内甚至在同一杆塔上的实际情况,在实验室设计高压交流、直流输电线路模拟实验来探究在混合交直流输电线路下方地面交流电场、直流电场分布受到的影响。实验结果反映了附加线路及其电压改变、线路间距改变等因素对地面交流、直流电场变化的影响,并得出附加导线的分流或屏蔽作用会降低另一条导线的地面场强等一系列结论.

For the real situation that HVAC transmission line and HVDC transmission line are in the same corridor or even same tower,a simulation experiment of HVAC and HVDC transmission lines was carried out in laboratory to study the infection between AC electric field and DC electric field under the hybrid lines.Experiment results showed that the additional line and its voltage change,the line safety spacing change and other factors can affect the ground AC and DC electric field greatly.And the conclusion that the additional line shunting or shielding would decrease the electric field strength of the other lines was also obtained.