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Signal analysis methods to distinguish tracking process using time-frequency analysis

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3 Author(s)
Seung-Wook Jee ; Boo-sung Co. Daegu-si, Daegu ; Chun-Ha Lee ; Kwang-Sik Lee

This paper proposes a method to distinguish the tracking process only in terms of voltage waveforms. Tracking is simulated using the IEC (International Electrotechnical Commission) 60112 method. The tracking process is observed in 5 stages - static state, discharge inception, discharge in progress, carbon formation, and tracking breakdown. The measured voltage waveforms are analyzed by two signal processes. The two kinds of signal processing are: improved time-frequency and time-energy analysis. The tracking process can be distinguished by using the improved time-frequency analysis visually by stages. It can also be distinguished by using average and standard deviation for the results of the time-energy analysis. Particularly, probability distribution for the result of the time-energy analysis appears a regular pattern in tracking process by stages.

Published in:

Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:16 ,  Issue: 1 )

Date of Publication:

February 2009

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