特高压直流接地极对高铁桥梁接地系统的影响  

The Influence of Ultra HVDC Grounding Electrode on the High-speed Railway Bridges Grounding System

作　　者：李晨琨 张华志[1] 黄军[1] 张波[2] 宋伟 LI Chenkun;ZHANG Huazhi;HUANG Jun;ZHANG Bo;SONG Wei(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 430063,China;State Key Lab of Power Systems,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京100084

出　　处：《铁道工程学报》2021年第10期90-94,共5页Journal of Railway Engineering Society

基　　金：中铁第四勘察设计院集团有限公司重点课题(2018K058)。

摘　　要：研究目的:在单极大地回路运行方式下,特高压直流输电系统的直流接地极将在大地中形成一个恒定的直流电流场,导致大地中的直流电流通过接地点流入高铁综合接地系统,进而对高铁其他部分产生影响。为了考察特高压直流接地极对高速铁路综合接地系统的影响,本文利用CDEGS软件针对高速铁路桥梁段综合接地系统进行建模,以便得出高铁桥梁段接地系统的沿线电位及直流电流分布规律。研究结论:(1)利用CDEGS软件针对高铁桥梁段建立的局部直流通路模型,为考察高铁综合接地系统内部电压、电流分布提供了有力工具,也为其他大型设施进行直流通路建模提供了思路;(2)本研究成果有助于提高特高压直流输电工程及高速铁路工程建设水平,可为其远期规划选址提供理论依据。Research purposes:In the monopolar ground circuit operation mode of DC transmission system,the DC grounding electrode of the Ultra High Voltage Direct Current(UHVDC)will form a constant DC current field in the ground,causing the DC current in the ground flowing into the high-speed rail integrated grounding system through the grounding point,and then affect other parts of the high-speed rail.In order to investigate the impact of UHVDC grounding electrodes on the integrated grounding system of high-speed railways,this paper uses CDEGS software to model the integrated grounding system of high-speed railway bridge sections,and obtains the distribution of potential and DC current along the grounding system of high-speed railway bridge sections.Research conclusions:(1)The local DC model established by CDEGS software for high-speed rail bridge sections provides a powerful tool for investigating the internal voltage and current distribution of the high-speed mil integrated grounding system,and also gives ideas for DC modeling for other large facilities.(2)The research results are helpful to improve the construction level of UHVDC and high-speed railway projects,and provide theoretical basis for its long-term planning and site selection.

关 键 词：直流接地极 高速铁路 综合接地系统 CDEGS 

分 类 号：U455[建筑科学—桥梁与隧道工程]