高电压技术2018，Vol.44Issue(1)：218-225,8.DOI:10.13336/j.1003-6520.hve.20171227027
特高压变压器直流偏磁空载电流实时计算
No-load Current Real-time Calculation of DC-biased UHV Transformer
摘要
Abstract
By getting inductance-current curve and DC-biased exciting current peak-DC curve of ultra high voltage(UHV) transformer,we put forward a kind of real-time model for DC-biased exciting current calculation,in which,the DC resistance of UHV transformer is ignored.Compared with the time-domain magnetic-circuit coupled method,the real-time calculation is proved to be exact.Through selecting the optimal iterative algorithm and applying a variable step strategy,the efficiency and real-time performance of real-time calculation model can be enhanced.Given any DC data of the value,we can get the corresponding waveform of exciting current with the DC bias in the millisecond time.Results show that real-time model for DC-biased exciting current calculation has great advantages in terms of performance on computing speed and accuracy.The real-time model has widespread application prospect in online assessment on electric parameter perturbation due to the DC-biased problem of UHV transformer,preventing refusing action or incorrect tripping of power system relay protection and other electrical equipment safety operation and so on.关键词
特高压变压器/直流偏磁/电感-电流曲线/空载电流峰值-直流偏磁电流曲线/实时计算/变步长/在线评估Key words
UHV transformer/DC-biased/inductance-current curve/exciting current peak and DC-biased current curve/real-time calculation/variable step/online assessment引用本文复制引用
王泽忠,邓涛,谭瑞娟,杨箫箫,刘连光..特高压变压器直流偏磁空载电流实时计算[J].高电压技术,2018,44(1):218-225,8.基金项目
国家重点研发计划(2016YFC0800103).Project supported by National Key R&D Program of China(2016YFC0800103). （2016YFC0800103）
