摘要
牵引变电所接地网对牵引供电系统的安全、稳定运行有着极为重要的作用,随着接地网运行年限的增加,接地网的地下部分遭受腐蚀而带来的接地网特性参数超标问题,危害着牵引供电系统的安全与稳定运行。本文使用CDEGS专业接地软件进行仿真计算,分析土壤电阻率、地网面积和地网均压导体布置方法不同时,接地导体腐蚀程度对地网接地电阻的影响。通过仿真研究得出:随着土壤电阻率减小,接地导体腐蚀程度增大,其对地网接地电阻的影响也越大;对于相同的腐蚀情况,地网面积越大,地网接地电阻增加得越明显;在地网等面积和等钢材用量下,通过合理选择地网均压导体布置方法,降低接地网接地电阻受腐蚀影响的程度,实现经济技术最优化。
The grounding mesh of traction substations plays a key role in the safe and stable operation of the traction power supply system.With the increase of the operation time of the grounding mesh,the characteristic parameters in excess of the standard caused by grounding conductor corrosion,are harmful to the safe and stable operation of the traction power supply system.In this paper,the CDEGS professional grounding simulation software was used to carry out the simulation calculation,to analyze the influence of grounding conductor corrosion on the grounding resistance of the grounding mesh,when the soil resistivity,grounding mesh area and grounding mesh equalizing conductor arrangement method are different.Results show that,with the decrease of soil resistivity,the degree of grounding conductor corrosion increases,resulting in greater impact on the grounding resistance.Under the same corrosion conditions,the wider the grounding mesh area,the greater the grounding resistance of the grounding mesh.Under the same grounding mesh area and steel consumption,through a reasonable choice of grounding mesh equalizing conductor arrangement method,the influence of corrosion on the grounding resistance of grounding mesh can be reduced to achieve economic and technological optimization.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2018年第2期39-44,共6页
Journal of the China Railway Society
关键词
接地网
接地导体
腐蚀
接地电阻
grounding mesh
grounding conductor
corrosion
grounding resistance
