电网技术2012，Vol.36Issue(5)：6-10,5.
交直流同塔三回输电线路地面电场的预测分析
Prediction of Ground Level Electric Field and Ion Current Density Under Three-Circuit HVAC/HVDC Transmission Lines on One Tower
摘要
Abstract
Based on finite element method(FEM)and finite volume method(FVM), the interaction between DC corona discharge and AC corona discharge was considered reasonably and simultaneously to solve the problem of computing the distribution of ground level electric field under multi-circuit AC/DC transmission lines on the same tower. Through experiments based on small-size model the effectiveness of the proposed computation method was verified. Based on actual condition of one circuit of ±800kV DC transmission and double circuits of 500kV transmission lines on the same tower, the distribution of DC component and AC component of ground level electric field as well as that of ion current density under different operational modes were calculated. Calculation results showed that due to AC corona discharge of AC power transmission lines, the DC component of ground surface electric field and ion current density reduced some extent. Meanwhile, ground level AC electric filed strength and ground level DC electric filed strength decreased along with the increase of the height of transmission lines, and the variation extent of power frequency electric field was more obvious than DC electric field.关键词
电晕放电/电场/混合线路/离子流密度/数值计算Key words
corona discharge/ electric field/ hybrid AC-DC transmission lines/ ion current density/ numerical method t分类
信息技术与安全科学引用本文复制引用
卢铁兵,周象贤,李健,崔翔..交直流同塔三回输电线路地面电场的预测分析[J].电网技术,2012,36(5):6-10,5.基金项目
国家自然科学基金重点项目(51037001). （51037001）
