摘要
针对利用频响分析法检测变压器绕组变形的特点,即检测得到的特征量是绕组的频谱(传递函数),提出了利用正交多项式拟合变压器绕组传递函数的原理和方法。该方法避免了用普通多项式拟合传递函数造成的弊病。利用正交伴随矩阵求取传递函数的零、极点,并根据零、极点的分布变化判断绕组变形与否。最后通过实例证明该方法简单、快速、灵敏度高,比仅仅依靠频响曲线判断绕组变形有了很大的提高。
Transformer winding deformation can be detected using frequency response analysis ,namely the character got from which is the spectra of winding ( transfer function ) .The theory and method of using orthogonal polynomials to fit the transfer function of transformer winding is introdu - ced ,Which avoids the morbid problem caused by using usual polynomials.Zeros and poles are obtained by means of orthogonal companion matrix and the winding deformations are diagnosed according to their distribution.This method is proved simple ,fast and sensitive ,which is much better than that of only depending on frequency response curves.
出处
《电力自动化设备》
EI
CSCD
北大核心
2004年第6期88-90,共3页
Electric Power Automation Equipment
关键词
电力变压器
绕组变形
传递函数
正交多项式
power transformer
winding deformation
transfer function
orthogonal polynomials
