电力系统保护与控制2015，Vol.43Issue(18)：1-5,5.
基于有限元方法的直流输电接地极多层土壤地电位分布计算
Calculation of multi-layer soil earth surface potential distribution of HVDC due to finite element method
摘要
Abstract
Strong electric field will be produced in the earth around the grounding poles when HVDC transmission system operates in ground-return mode, which will influence electrical equipment nearby and the metallic pipelines underground. This paper builds a model of multi-layer soil and a typical soil model on basis of actual distribution of soil around the grounding poles, and then calculates surface potential distribution of typical grounding poles by finite element method. The grounding characteristics of DC transmission grounding electrode and the influence on earth surface potential distribution of the two models are compared. The results show that, the ground resistance and the step voltage around the site are much affected by the soil resistivity where the grounding locates. While the ESP which is within the range of tens of meters, is affected by the deep soil resistivity.关键词
高压直流输电/直流接地极/电流场/大地电场模型/有限元/地面感应电势Key words
HVDC/DC grounding electrode/current field/earth electric field model/finite element/earth surface potential分类
信息技术与安全科学引用本文复制引用
刘连光,马成廉..基于有限元方法的直流输电接地极多层土壤地电位分布计算[J].电力系统保护与控制,2015,43(18):1-5,5.基金项目
国家自然科学基金项目(51177045) （51177045）
国家 863高技术基金项目(2012AA121005) （2012AA121005）
北京市教委中央在京高校共建项目(YB20101007901) This work is supported by National Natural Science Foundation of China (No. 51177045), National High-tech R & D Program of China (863 Program) (No. 2012AA121005), and Beijing City Board of Education Center in Beijing College Construction Project (No. YB20101007901). （YB20101007901）
