摘要
计算超高压输电线路在建筑物附近所产生工频电场时,由于建筑物相对输电线路所处位置复杂多变,二维计算模型已经不能够准确的描述其电场分布情况。笔者综合考虑档距、弧垂等因素,基于模拟电荷法建立能够准确描述建筑物相对输电线路所处位置的三维计算模型,采用线电荷单元模型计算输电线附近存在建筑物时的三维电场,且与增大建筑物棱边曲率半径后的电场分布对比得出:建筑物上方的电场强度大于附近其余区域,与无建筑物时相比电场发生明显畸变;增大建筑物棱边曲率半径对建筑物附近电磁环境有较好改善作用。
Two-dimensional calculation model is not sufficient for accurately calculating electric field distribution around a building under EHV transmission lines because of intricate space between building and transmission lines. Considering the factors such as span and sag, the authors establish a three-dimensional calculation model based on the charge simulation method to precisely describe the relative position between building and transmission lines. A line charge unit model is used to calculate three-dimensional electric field around a building under transmission lines. Simulation results show that： the electric field is of greater intensity above the building than in other areas, and appears obvious distortion compared with the situation without any building; and increasing the radius of curvature of building edges can improve the electromagnetic environment around a building.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第10期1-6,共6页
High Voltage Apparatus
基金
国家自然科学基金项目(51007096)~~
关键词
超高压
输电线
模拟电荷法
线电荷单元
建筑物
三维电场
extra high voltage
transmission lines
charge simulation method
line charge unit
building
three-dimensional electric field
