期刊论文

Analysis and research on DC bias of transformer caused by subway stray current

中文

上海电机学院学报

2095-0020

2019

22

1

56-62

10.3969/j.issn.2095-0020.2019.01.010

国家自然科学基金资助项目(50977003) 教育部工程研究中心基金资助项目(2010#03).

本校为第一机构

轨道交通直流供电系统产生的杂散电流经过中性点流入主变压器,导致变压器产生直流偏磁现象.振动与噪声特性是监测变压器运行状态的基本参数.以长沙地区某220 kV主变压器为研究对象,采用COMSOL Multiphysics有限元软件建立变压器三维模型并仿真分析其振动与噪声特征.对比分析变压器正常运行与直流偏磁为1A时变压器的应力、位移变化、振动加速度和声场空间分布,并进行现场测量噪声与试验振动特性,验证了仿真模型的正确性.从仿真与试验两个方面验证得出发生直流偏磁时主变压器的振动与噪声将加剧,对变压器正常运行产生重大影响.这为开展轨道交通供电系统中主变直流偏磁状态监测与抑制提供理论支持,...

The stray current generated by the rail transit DC power supply system flows into the main transformer through the neutral point,which causes the transformer to generate DC bias.The vibration and noise characteristics are the basic parameters for monitoring the normal operation state of the transformer.By taking a 220 kV main transformer in Changsha as the research object,the three-dimensional model of the transformer is built by the COMSOL Multiphysics finite element software,and its vibration and noise characteristics are simulated.In this paper,the stress,displacement variation,vibration ac...