中国电机工程学报2017，Vol.37Issue(17)：5198-5205,8.DOI:10.13334/j.0258-8013.pcsee.161842
定点时间周期有限元法及其在变压器直流偏磁特性分析中的应用
Fixed-Point Time-Periodic Finite Element Method and Its Application for DC Bias Characteristics of Transformer
摘要
Abstract
According to the periodic characteristics of the variables in electromagnetic field under steady-state excitation,the magnetic vector potential and the exciting current were taken as the unknown variables,the field-circuit coupled time-periodic finite element method was applied to study the DC-biased problems of power transformers.Achieving the equivalent thickness of the 2D magnetic system by calculating the magnetic field energy,combining with the locally convergent fixed-point method,and choosing the suitable convergence factor and the initial values,the computational accuracy and efficiency of the proposed method are effectively improved.The experiment and calculation about transformer DC bias in different conditions were carried out on a laminated core model,and the results of the calculation agree with those of the measurement,which verify the proposed method can be used to study the DC-biased transformers.By artificially increasing the resistance and setting up the compensation voltage,this paper provides a solution to solve the stability problem caused by the small resistance and the drastic change of inductance in the DC-biased calculation of transformers.关键词
直流偏磁/时间周期有限元/场路耦合/固定点法/精度分析Key words
DC bias/time-periodic finite element method (TPFEM)/filed-circuit coupled/fixed-point method/accuracy analysis分类
信息技术与安全科学引用本文复制引用
王帅兵,李琳,赵小军,谢裕清,蔡林海..定点时间周期有限元法及其在变压器直流偏磁特性分析中的应用[J].中国电机工程学报,2017,37(17):5198-5205,8.基金项目
国家863高技术基金项目(2012AA050401) （2012AA050401）
国家电网公司科技项目(SGRI-DL-71-12-005) （SGRI-DL-71-12-005）
国家自然科学基金项目(51277064).Project Supported by National High Technology Research and Development of China 863 Program (2012AA050401) （51277064）
Science & Technology Project of SGCC (SGRI-DL-71-12-005) （SGRI-DL-71-12-005）
National Natural Science Foundation of China (51277064). （51277064）
