V/V接线牵引变压器励磁涌流建模及特征分析  

Modeling and Characteristic Analysis of Magnetizing Inrush Current for V/V Connection Traction Transformer

作　　者：王建波 白杰 邵文权[2] 张志华 WANG Jianbo;BAI Jie;SHAO Wenquan;ZHANG Zhihua(State Grid Electric Power Company Shaanxi Electric Power Research Institute,Xi'an 710100;School of Electronic and Information,Xi'an Polytechnic University,Xi'an 710048)

机构地区：[1]国网陕西省电力公司电力科学研究院,西安710100 [2]西安工程大学电子信息学院,西安710048

出　　处：《计算机与数字工程》2020年第3期682-687,共6页Computer & Digital Engineering

基　　金：国家电网公司科技项目(编号:SGTYHT/15-JS-194);西安工程大学博士启动基金项目(编号:BS1018)资助。

摘　　要：励磁涌流不仅易导致变压器差动保护误动作,甚至损坏绕组。针对V/V接线牵引变压器空载合闸或外部故障切除恢复供电时会在一次侧产生较大励磁涌流问题,分析了励磁涌流产生的机理以及影响因素。研究发现励磁涌流与合闸初相角、剩磁以及铁芯饱和特性密切相关。利用Matlab软件对牵引变压器合闸涌流进行仿真验证,计算分析结果与理论分析一致,为励磁涌流的识别、抑制以及差动保护优化设计提供了基础。Inrush current is easy to cause transformer differential protection to failure or even damage the winding. This paper analyses the problem of large inrush current will occurs on the primary side when the power supply of V/V wiring traction transformer closing without load or external fault excision is restored. The mechanism of inrush current and the influencing factors are analyzed by mathematical modeling and theory. It is found that the inrush current is closely related to closing initial phase angle,remanence and magnetic saturation characteristics. The results of Matlab simulation of traction transformer inrush current are consistent with the theoretical research,which provides a useful reference for the inrush current identification,suppression and accurate setting of the differential protection.

关 键 词：牵引变压器 励磁涌流 空载合闸 V/V接线 

分 类 号：TM743[电气工程—电力系统及自动化]