N线参数对高速铁路牵引变电所地回流占比影响研究  

作　　者：黄文勋[1] 蒋功连[1] 盛望群[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司

出　　处：《电气化铁道》2020年第S02期139-142,共4页Electric Railway

摘　　要：我国高速铁路部分牵引变电所地回流比例长期偏高,加剧了地网结构的腐蚀,甚至烧损接地体和设备。本文根据高速铁路牵引供电系统等效牵引回流模型,给出了考虑N线参数影响的钢轨电位和电流计算式,并分析了N线参数变化对牵引回流的影响。结合实际工程案例,总结了不同N线参数下牵引回流分布规律,得出了N线参数不合适是导致变电所地回流过大的主要原因这一重要结论,并提出了针对性的抑制方案。通过对比工程整改前后的实测数据,验证了分析和措施的正确性,对优化高速铁路牵引回流系统设计提供了重要依据。The long-term high proportion of ground return current in some traction substations of high-speed railway in China aggravates the corrosion of earthing grid structure and even burns the earthing body and equipment.Based on the equivalent traction return current model of high-speed railway traction power supply system,the calculation formulae of rail potential and current with considering the influence of N-line parameters are given,and the influence of N-line parameters on traction return current is analyzed.Combined with practical engineering cases,the distribution law of traction return current under different parameters of N-line is summarized.It is concluded that improper parameters of N-line are the main cause of excessive return current in substation,with regard to this,the corresponding scheme for its suppression is proposed.By comparing the measured data before and after the project rectification,the correctness of the analysis and measures is verified,and it provides an important basis for optimizing the design of traction return system of high-speed railway.

关 键 词：高速铁路 N线 地回流 轨回流 抑制方案 

分 类 号：U224.26[交通运输工程—道路与铁道工程]