Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

Application of Joint Time-Frequency Analysis on PD Signal Based on Improved EEMD and Cohen’s Class

Authors
Xu Cheng, Fengyuan Yang, Shiyang Tao, Wenshan Wang
Corresponding Author
Xu Cheng
Available Online July 2015.
DOI
10.2991/icaees-15.2015.139How to use a DOI?
Keywords
Partial Discharge (PD); EEMD; end effects; SVR; Cohen's class; Time-Frequency analysis
Abstract

The feature extraction and pattern recognition of partial discharge signal are key steps of equipment condition assessment and fault diagnosis. Time-frequency analysis on PD pulse can make up for deficiencies of traditional phase statistical method by extracting more comprehensive and effective information from waveform. Cohen’s class distribution is a commonly used time-frequency analysis method except for influence of cross interference terms. This paper presents a method of joint time-frequency analysis on PD pulse signal based on EEMD and Cohen’s class. The end effect of EEMD is studied and an extending technology based on SVR-regression fitting method is proposed as well. The exponential attenuation oscillating function added with Gaussian white noise and narrow band interference is used to simulate the high frequency current PD signal of power equipment. The results show that this method can accurately identify the characteristic PD pulse. This method can not only guarantee the time-frequency concentration of effective signal, but also inhibit the influence of IMFs’ cross interference terms. Finally, we prove the effectiveness and practicality of this method by applying it on PD signal field measured in substation.

Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
Series
Advances in Engineering Research
Publication Date
July 2015
ISBN
10.2991/icaees-15.2015.139
ISSN
2352-5401
DOI
10.2991/icaees-15.2015.139How to use a DOI?
Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Xu Cheng
AU  - Fengyuan Yang
AU  - Shiyang Tao
AU  - Wenshan Wang
PY  - 2015/07
DA  - 2015/07
TI  - Application of Joint Time-Frequency Analysis on PD Signal Based on Improved EEMD and Cohen’s Class
BT  - Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
PB  - Atlantis Press
SP  - 757
EP  - 765
SN  - 2352-5401
UR  - https://doi.org/10.2991/icaees-15.2015.139
DO  - 10.2991/icaees-15.2015.139
ID  - Cheng2015/07
ER  -