电气化铁路平衡牵引变压器电流不平衡度研究  

Research on Current Unbalanced Degree of Balance Traction Transformer in Electrifed Railway

作　　者：李永胜[1] 盛义发[1] 桂卫华[2] 喻寿益[2] 

机构地区：[1]南华大学电气工程学院,湖南衡阳421001 [2]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《电气传动》2014年第10期69-73,共5页Electric Drive

基　　金：国家自然科学基金项目(51277056);湖南省自然基金项目(10JJ6076);南华大学博士启动基金项目(2011XQD41)

摘　　要：针对电气化铁路牵引变压器的电流不平衡度问题,以电气化铁路运行的两种典型平衡牵引变压器为研究对象,采用变压器磁势平衡原理、绕组接线方程和对称分量法为理论基础的系统化分析方法,推导出不同工况下电流不平衡度通式,分析了平衡牵引变压器电流不平衡特性;利用Matlab/Simulink仿真平台建立了平衡牵引变压器实验模型,研究了高速客运、货运及客货混用专线列车用牵引变压器电流不平衡度的变化规律,给出了平衡牵引变压器在3种线路工况下的不同运行控制策略,提出了抑制电流不平衡度的方法。实验结果和理论推导验证了所提方法的正确性和可行性。Problem of current unbalanced degree based on traction transformer in electrifed railway,regarded twotypical balance traction transformers of operating in electrifed railway as the research subject.A systematic analysismethod,based on the transformer magnetomotive force balance principles,winding connection equations andsymmetrical component methods,general formula of current unbalanced degree in different operating mode werederived,characteristic of current unbalanced of balance traction transformer was analyzed;the experimental model ofbalance traction transformer in simulation platform was set up based on Matlab/Simulink.The change regularity tocurrent unbalanced degree of traction transformer on passenger transport,freight transport and passenger and freightmixed line trains were researched,the different operating control strategy of balance traction transformer in threemodes were obtained.The measure restraining current unbalanced degree was presented.Simulation and theoreticalanalysis verify the correctness and feasibility.

关 键 词：牵引变压器 负序电流 电流不平衡度 

分 类 号：TM922[电气工程—电力电子与电力传动]