Application of soft-threshold wavelet de-noising method in the diagnosis of transformer during impulse test

Author

Chenzhao, Fu ; Jian, Liu ; Yanming, Li ; Jie, Liu ; Guogang, Wang

Author_Institution

Xi´´an Jiaotong Univ., China

fYear

2001

fDate

2001

Firstpage

845

Lastpage

848

Abstract

In this paper, neutral point current data during transformer impulse tests are analyzed by soft-threshold shrinkage de-noising method based on wavelet frame. Simulation tests are made to verify that the partial features of the original signal can be reserved after de-noising. The simulation results show that this de-noising method is applicable to processing the oscillating signal that damps quickly. In addition, it is verified that the conflicts between de-noising and reserving the signal´s partial features can be solved by this method

Keywords

fault location; impulse testing; power transformer insulation; power transformer testing; wavelet transforms; neutral point current data; oscillating signal; soft-threshold shrinkage de-noising method; transformer impulse tests; transformer insulation; wavelet frame; Fault detection; Impulse testing; Insulation testing; Noise reduction; Power transformer insulation; Power transformers; Shape; Voltage; Wavelet transforms; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on

Conference_Location

Himeji

Print_ISBN

4-88686-053-2

Type

conf

DOI

10.1109/ISEIM.2001.973810

Filename

973810