高架桥区段牵引网综合接地系统的建模研究  

Research on Modeling Scheme for Integrated Earthing of Traction Network in Viaduct Sections

作　　者：苏冬冬 刘志刚[1] 黄可[1] SU Dongdong;LIU Zhigang;HUANG Ke

机构地区：[1]西南交通大学电气工程学院

出　　处：《电气化铁道》2020年第5期15-21,共7页Electric Railway

基　　金：中国中铁二院工程集团有限责任公司科研项目(KYY2017025(17-18));四川省青年科技创新团队项目(2016TD0012)。

摘　　要：高铁多采用高架桥铺设方式,由于高架桥段接地结构的特殊性,对高架桥段牵引网综合接地系统进行建模研究非常必要。针对目前常见的接地电路模型等效法过于简化、传统宽频建模法易受初始迭代点影响的缺点,本文提出基于详细考虑接地结构的高架桥综合接地电路等效建模法和基于矢量匹配法及粒子群算法的高架桥综合接地宽频建模法。综合接地电路等效建模法通过将高架桥的接地钢筋进行逐一等效,建立较传统方法更加详细的等值电路模型。综合接地宽频建模法将粒子群算法与传统的矢量匹配法在迭代求解方面进行结合,相较传统矢量匹配法,该方法不需设置初始极点,所构建的宽频模型不受初始极点影响。通过与已有文献中高架桥频率响应进行对比,证明2种建模方法均具有合理性。Viaducts are widely adopted in China high speed railway.Viaduct sections have special earthing structure.It is necessary to execute the modeling studies on the integrated earthing system of traction network for viaduct sections.Considering that conventional method of earthing circuit equivalent is too simplistic and existing broadband modeling approach is susceptible to initial iterations,the method of earthing circuit equivalent based on detailed consideration of the earthing structure and the broadband modeling method based on vector fitting and particle swarm optimization are proposed in this paper.The comprehensive earthing circuit equivalent modeling method establishes a more detailed equivalent circuit model than the traditional method by equivalent earthing reinforcement of viaduct one by one.Compared with the traditional vector matching method,this method does not need to set the initial poles,and the broadband model is not affected by the initial poles.By comparing with the frequency response of viaduct in the existing literature,it is proved that both of the two modeling methods are reasonable.

关 键 词：高速铁路 高架桥 综合接地系统 接地电路模型等效 矢量匹配法 粒子群算法 

分 类 号：U223.2[交通运输工程—道路与铁道工程]