新型牵引变直流偏磁励磁的混合仿真分析  

Hybrid Simulation Analysis of Novel Traction Transformer under DC Bias Excitation

作　　者：杨柳林[1] 王韬策 王涛 李永革 YANG Liulin;WANG Taoce;WANG Tao;LI Yongge(School of Electrical Engineering,Guangxi University,Nanning 530004,China;Guangxi Liuzhou Special Transformer Co.,Ltd,Liuzhou 545036,China)

机构地区：[1]广西大学电气工程学院,南宁530004 [2]广西柳州特种变压器有限责任公司,柳州545036

出　　处：《电源学报》2024年第5期309-318,共10页Journal of Power Supply

基　　金：广西科技厅重大研究资助项目(AB18126026)。

摘　　要：城市轨道交通牵引供电系统的稳定关乎城市电网的安全和交通稳定运行,由于大量投入使用的电缆和一系列电力电子装置,产生了严重破坏牵引供电系统安全性的谐波和无功问题。牵引变作为牵引供电系统的核心设备,具有传输供电和滤除非线性负载谐波等重要作用,直流偏磁是1种广泛存在的会对牵引变产生不利影响的现象,严重时会直接威胁牵引变的安全稳定运行。基于PSCAD/EMTDC及ANSYS分别建立了1种新型牵引变的UMEC及有限元模型,由励磁电流特性入手,通过多平台混合仿真的手段对这一新型牵引变遭受直流偏磁影响时的电磁、损耗等励磁特性进行了观测和分析,并与传统牵引变进行对比,评估了该新型牵引变遭遇直流偏磁时的励磁状态。The stability of an urban rail transit traction power supply system is related to the safety of urban power grid and the stable operation of traffic.Due to the large amounts of cables and a series of power electronic devices which have been put into use,problems such as harmonics and reactive power will arise and seriously damage the safety of the traction power supply system.As the core equipment of the traction power supply system,the traction transformer has important functions such as transmitting power supply and filtering nonlinear load harmonics.DC bias is a widespread phenomenon adversely affecting the traction transformer,and it may directly threaten the safe and stable operation of the traction transformer.Based on PSCAD/EMTDC and ANSYS,the UMEC model and finite element model of a novel traction transformer are established,respectively.By means of multi-platform hybrid simulation,the electromagnetic,loss and other excitation characteristics of this traction transformer under DC bias are observed and analyzed.With a comparison with the traditional traction transformer,the excitation situation of the novel traction transformer under DC bias is evaluated.

关 键 词：牵引变 直流偏磁 励磁特性 混合仿真 

分 类 号：TM761[电气工程—电力系统及自动化]