摘要
测量了30ZH120电工钢片在不同直流偏磁及温度条件下磁特性,经过迭代计算得到了考虑偏置磁通后的B-H曲线。基于一台产品级750kV换流变压器(哈密-郑州特高压直流输变电工程),仿真计算了不同直流偏磁及温度条件下换流变压器磁场分布和空载电流,结果表明:直流偏磁和工作温度影响电工钢片和换流变压器铁心线性区和非线性区,随着温度及直流偏磁的增加,换流变压器铁心磁通密度和空载电流增加,因此,在设计中应该考虑温度及直流偏磁的影响。
The magnetic properties of 30ZH120 electrical silicon sheet under different DC bias and temperature conditions were measured,and the B-H curve considering the bias flux is obtained by iterative calculation.Then,the magnetic field distribution and excitation current characteristics of one product grade 750kV converter transformer(Hami-Zhengzhou UHV DC Transmission and Transformation Project)under different DC bias and temperature conditions are simulated.The results show that,DC bias and working temperature affect the linear and nonlinear regions of the electrical steel sheet and converter transformers.The magnetic flux density and no-load current of converter transformer will increse with increase of temperature and DC bias.Therefore,the effect of temperature and DC bias should be considered in the transformer design.
作者
党艳阳
陈德志
白保东
张欣宜
DANG Yan-yang;CHEN De-zhi;BAI Bao-dong;ZHANG Xin-yi(TBEA Shenyang Transformer Group CO.,LTD.,Shenyang 110144,China;School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;Chang’an Branch of Xi’an Power Supply Company,Xi’an 710000,China)
出处
《电工电能新技术》
CSCD
北大核心
2020年第4期34-42,共9页
Advanced Technology of Electrical Engineering and Energy
关键词
直流偏磁
温度
换流变压器
磁场分布
励磁电流
DC bias
temperature
converter transformer
magnetic field distribution
excitation current