Title :
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
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;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973810
