NDLI: Feature extraction of UHF PD signals by wavelet packet based MRSD analysis For defect identification in Gas Insulated Systems

Content Provider	IEEE Xplore Digital Library
Author	Umamaheswari, R. Sarathi, R.
Copyright Year	2012
Description	Author affiliation: Rajalakshmi Eng. Coll., Chennai, India (Umamaheswari, R.) \|\| Indian Inst. of Technol. Madras, Chennai, India (Sarathi, R.)
Abstract	In condition monitoring of Gas Insulated Systems (GIS) the upcoming failure modes can be diagnosed well ahead by analyzing the Partial Discharge (PD) activity. In recent times, Ultra High Frequency (UHF) technique is recognised as effective tool for online PD analysis. In this paper, a simple and effective wavelet packet based multi-resolution signal decomposition feature extraction scheme is proposed to estimate the spectral energy distribution of UHF signal for PD source location. Further, the relationship between critical frequency components of UHF PD signal generated by different type of defects is investigated. The optimized model is ascertained for common onsite defects called protrusion on electrode, freely moving metallic particle, surface discharge in epoxy spacer, floating particle sitting on the epoxy spacer of compressed SF6 GIS under HVAC. The four defects are modeled in laboratory environment and defect identification with the proposed technique is verified with the minimum success rate of 95% irrespective of physical conditions like, gas pressure, PD severity or defect location.
Sponsorship	IEEE Stand. Assoc.
Starting Page	1218
Ending Page	1222
File Size	1482076
Page Count	5
File Format	PDF
ISBN	9781467322706
e-ISBN	9781467322720
DOI	10.1109/INDCON.2012.6420804
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-07
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Surface discharges Multi Resolution Signal Decomposition Feature extraction PD classification Wavelet Packet Transform Wavelet packets Discharges (electric) UHF technique Energy-Entropy Gas insulation
Content Type	Text
Resource Type	Article

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