Diagnosis of contacts loosening fault of onload tap changer based on EEMD

Huadian Technology ›› 2012, Vol. 34 ›› Issue (1): 12-15.

• 研究与开发 • Previous Articles Next Articles

Diagnosis of contacts loosening fault of onload tap changer based on EEMD

HONG Xiang1, MA Hongzhong1, GAO Peng1, CHEN Kai2, WANG Chunning2

1.College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China; 2.Nanjing Power Supply Company, Jiangsu Province Electric Power Corporation, Nanjing 210008, China

Received:1900-01-01 Revised:1900-01-01 Online:2012-01-25 Published:2012-01-25

Abstract

Abstract: Aiming at the mode mixing problem, which is exists in the vibration signal fault detection for transformer onload tap changer (OLTC) using HilbertHuang transform (HHT) based on empirical mode decomposition (EMD), the ensemble empirical mode decomposition (EEMD) method was put forward; and the mode mixing problem of EMD had been proved effectively. Based on the EEDM, the vibration signal can be HilbertHuang transformed; the marginal spectrum can be drawn from the HHT result; then the detection of the contacts loosening fault can be realized. The simulation and practical experiment show that to use this method in analysis of vibration signal of the tap changer can draw the values of the fault characteristic parameters effectively; and this is useful for contacts fault diagnosis.
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Key words: on-load tap changer, vibration signal, fault diagnosis, ensemble empirical mode decomposition (EEMD), Hilbert-Huang transform (HHT), marginal spectrum

HONG Xiang;MA Hongzhong;GAO Peng;CHEN Kai;WANG Chunning. Diagnosis of contacts loosening fault of onload tap changer based on EEMD[J]. Huadian Technology, 2012, 34(1): 12-15.

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Diagnosis of contacts loosening fault of onload tap changer based on EEMD

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