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STUDY OF RELAYING PROTECTION FOR TRANSFORMER APPLYING IRWT

Zhang Chuanli,Huang Yizhuang,Ma Xiaoxu,Wang Guoxing(Tsinghua University,100084,Beijing,China)Ren Zhigang(Shandong Electric Power Bureau,250061,Ji'nan,China)  
A mother wavelet suitable for processing transient signals of power system is constructed according to theory of the wavelet analysis.The improved recursive wavelet transform(IRWT) is presented in order to meet the real-time demands of analyzing power system signals. At the same time,IRWT is used to detect the transformer inrush current generated by PSCAD,which is proved both effective and feasible.
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