高压直流输电单极运行对土壤电阻率的影响(英文)

被引：3

作者：

黄镇 ^{[1
,2
]}

吴广宁 ^{[1
]}

蒋伟 ^{[1
]}

机构：

[1] School of Electrical Engineering,Southwest Jiaotong University

[2] Sichuan Electric Power Company

来源：

高电压技术 | 2009年 / 35卷 / 03期

关键词：

UHVDC; monopole operation; grounding electrode; DC density; soil resistivity; porous media;

D O I：

10.13336/j.1003-6520.hve.2009.03.027

中图分类号：

TM721.1 [直流制输电];

学科分类号：

080802 ;

摘要：

UHVDC transmission system is characterized by transferring large amount of electrical power over long distance , which plays an important role in the west-to-east power transmission project. Since the underground current can reach several kA under UHVDC monopole operation, the safe and stable operations of grounding electrode are highly relative with nearby soil resistivity. This paper introduces porous media model and analyzes the influence of rising temperature around grounding electrode on soil resistivity. Based on researching soil conduction mechanism under DC, calculation formula for soil resistivity and the rule of DC density on soil resistivity are presented. Furthermore, the relationship between DC density and soil resistivity is obtained, which was demonstrated by current characteristics experiment of soil resistivity.

引用

页码：445 / 450

页数：6

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