电测与仪表2017，Vol.54Issue(18)：54-58,5.
基于FFT的变压器励磁涌流谐波含量计算方法
The calculation method of harmonic content of transformer inrush current based on FFT
摘要
Abstract
The inrush current that is several or even a dozen times of rated current can appear when the transformer closing switch without loads.This current only flows through one side of transformer.So, it drains into the current dif-ferential loop and may lead to the false action of protection.The simulation models are set up by means of the Matlab/Simulink software according to the actual parameters of main transformer in 220 kV new generation smart substation of Hunan power grid.The inrush current model under different closing initial angles is simulated and calculated.The fast Fourier transformation algorithm ( FFT) is used to calculate the harmonic content of inrush current, meanwhile, the generating mechanism, and discontinuous angles are also researched and analyzed.The rationality of protection setting value can be verified with this method according to the research results.关键词
变压器/励磁涌流/合闸初相角/二次谐波含量/间断角Key words
transformer/inrush current/initial closing angle/content of second harmonic/discontinuous angle分类
信息技术与安全科学引用本文复制引用
罗凌,黎志,王峰,侯赞,刘赟,叶会生..基于FFT的变压器励磁涌流谐波含量计算方法[J].电测与仪表,2017,54(18):54-58,5.基金项目
中央高校科研业务专项基金(2012207020208) （2012207020208）
国网湖南省电力公司科技项目(5216A513503B). （5216A513503B）
