复杂土壤结构对HVDC系统单极大地运行的地电位分布影响

张俊; 曹晓斌; 金炜东; 张思渊; 张彼德; 张榆

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复杂土壤结构对HVDC系统单极大地运行的地电位分布影响

更新时间：2025-06-18

- 复杂土壤结构对HVDC系统单极大地运行的地电位分布影响
- Distribution of Ground Potential Affected by Complicated Soil Structures in HVDC Systems of Monopolar Operation with Ground Return
- 高压电器 2025年页码：1-13
- 作者机构：
  
  1.西南交通大学电气工程学院，成都　 610031
  2.国网四川省电力公司甘孜供电公司，四川　甘孜　 626099
  3.西南电力设计院有限公司，成都　 610021
  4.西华大学电气与电子信息学院，成都　 610051
  5.国网四川省电力公司电力科学研究院，成都　 610041
- 作者简介：
  
  张俊（1983—），男，博士研究生，高级工程师，主要从事高压直流输电接地计算及环境影响的研究工作（E-mail：zhangjunsichuan@sina.com）。
- 基金信息：
  
  国家自然科学基金(51777175)
- DOI：
  中图分类号：
- 纸质出版日期：
- 稿件说明：
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张俊, 曹晓斌, 金炜东, 等. 复杂土壤结构对HVDC系统单极大地运行的地电位分布影响[J/OL]. 高压电器, 2025,1-13.

ZHANG Jun, CAO Xiaobin, JIN Weidong, et al. Distribution of Ground Potential Affected by Complicated Soil Structures in HVDC Systems of Monopolar Operation with Ground Return[J/OL]. High voltage apparatus, 2025, 1-13.
张俊, 曹晓斌, 金炜东, 等. 复杂土壤结构对HVDC系统单极大地运行的地电位分布影响[J/OL]. 高压电器, 2025,1-13. DOI：

ZHANG Jun, CAO Xiaobin, JIN Weidong, et al. Distribution of Ground Potential Affected by Complicated Soil Structures in HVDC Systems of Monopolar Operation with Ground Return[J/OL]. High voltage apparatus, 2025, 1-13. DOI：

摘要

高压直流（HVDC）输电系统接地极引起的地电位和电场分布，受土壤分层结构的影响，而接地极选址面临复杂土壤结构的背景。因此研究土壤结构中各种因素对地电位和电场分布规律的影响，将有助于改善其分布情况。文中以研究格林函数的微分方程和电位行波的反折射传播方式为方法入口，得到分层土壤结构下存在的振荡衰减函数，提取出电荷积累效应矩阵用于表示积累电荷再分布的振荡衰减过程，获得电位分布在水平、垂直和复合土壤结构下对土壤层厚度

，反折射率

和电流源位置

的表现差异。得出反折射率是影响振荡衰减过程的主要和持续因素，土壤层厚度是次要且持续因素，位置是初始且短暂因素。指出复合土壤结构中电位分布是垂直和水平电荷积累效应的相互影响，其斜方向的等效距离点为两者相互影响效果，土壤层厚度和综合反射率分别以距离函数和等效电荷方式影响衰减速度。最后根据某直流输电工程接地极地质勘测与季节变化情况，构成复杂土壤结构，并考虑接地极位置、土壤层厚度和土壤电阻率三大影响因素，模拟分析了极址5~25 km范围的地电位和电场分布规律。

Abstract

The grounding electrode always has impacts on the distribution of ground potential and electrode field for high voltage direct current (HVDC) transmission systems

which has to face the complicated soil structure. Therefore

the study on the factors affected by soil-layered structure is helpful for improving reasonable distribution for the ground potential and electrode field. Based on the differential equations of Green function and the approach of the reflecting and refracting function on traveling wave

it is revealed that there is a decay-vibration function in soil-layered and the matrix shown on accumulating electric charge has been extracted to disclose the decay-vibration process of the re-distribution on accumulating electric charge. Moreover

the S thickness of soil-layered

the k ratio of reflection and refraction

the h site of current source

as three factors affected by the vertical、horizontal and comprehensive soil-layered

are differently sensitive to the distribution of ground potential respectively

as shown that the k is a major and continuous factor

the S is a minor and continuous factor

the h is a initial and transient factor. In comprehensive soil-layered

the common effects on accumulation electric charge

coming from the horizontal soil-layered and vertical soil-layered

are derived from the equivalent site on the oblique direction. Corresponding to S and k

the decay-vibration process is illustrated on the way of distance-function and equivalent electric charge accumulating respectively. Finally

Based on the data of geological survey on grounding-electrode site associated with the season for a HVDC project

the distribution of ground potential and electric field has been simulated for 5~25 km scope of grounding electrode regarding the three factors affected by the thickness of soil-layered

soil resistivity and current source site.

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references

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