首页 | 本学科首页   官方微博 | 高级检索  
     

直流偏磁下变压器励磁电流的实验研究及计算
引用本文:李慧奇,崔翔,候永亮,李琳,卢铁兵.直流偏磁下变压器励磁电流的实验研究及计算[J].华北电力大学学报,2007,34(4):1-6.
作者姓名:李慧奇  崔翔  候永亮  李琳  卢铁兵
作者单位:华北电力大学,电气与电子工程学院,河北,保定,071003
基金项目:国家自然科学基金 , 河北省自然科学基金
摘    要:在直流偏磁条件下变压器励磁电流是研究变压器直流偏磁特性的关键。针对两种直流量引入方法,即直流量与正弦电压激励同侧引入和直流量与正弦电压激励异侧引入,通过实验结合数值计算,分析了两种引入直流量方法本质的区别及原因。研究结果表明:同侧引入直流电流比异侧引入直流电流更能准确地反映地磁感应电流或直流输电线路单极运行引起的变压器直流偏磁问题。其次,分析了直流偏磁对变压器励磁电流的有效值、直流分量及各次谐波影响的规律。最后,应用改进的磁路-电路耦合时域方法分析了直流偏磁下变压器的励磁电流,计算结果与测量结果吻合。本工作为研究变压器的直流偏磁问题打下了基础。

关 键 词:变压器  直流偏磁  励磁电流  实验
文章编号:1007-2691(2007)04-0001-06
修稿时间:2007-03-30

Experimental studies and calculations of the exciting current in the transformer under DC bias magnetization
LI Hui-qi,CUI Xiang,HOU Yong-liang,LI Lin,LU Tie-bing.Experimental studies and calculations of the exciting current in the transformer under DC bias magnetization[J].Journal of North China Electric Power University,2007,34(4):1-6.
Authors:LI Hui-qi  CUI Xiang  HOU Yong-liang  LI Lin  LU Tie-bing
Affiliation:School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China
Abstract:It is the key problem for studying the exciting current in the transformer under DC bias magnetization.Firstly,based on two methods of injecting DC bias,i.e.DC bias induced from the same side as sinusoidal voltage excitation and from the other side,the differences of the two methods and the reasons were studied by means of experiments and calculations.The results proved that DC bias induced from the same side as sinusoidal voltage excitation was more correct than the other method to reflect geomagnetically induced currents(GIC) and DC bias magnetization problems arose by the monopole operation in HVDC system.Secondly,we analyzed the effect of DC bias on the root-mean-square quantity,DC components and harmonic components of transformer exciting current.At last,the exciting currents of transformer under DC bias were calculated by utilizing of the improved magnetic circuit-electrical circuit coupled time domain method.The calculated results were in good agreement with the measured results.The work in the paper may set up a foundation for studying the transformer under DC bias magnetization.
Keywords:transformer  DC bias magnetization  exciting current  experiments
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号