10 April 2018 Study on time-frequency analysis method of very fast transient overvoltage
Author Affiliations +
Proceedings Volume 10615, Ninth International Conference on Graphic and Image Processing (ICGIP 2017); 1061558 (2018) https://doi.org/10.1117/12.2304669
Event: Ninth International Conference on Graphic and Image Processing, 2017, Qingdao, China
Abstract
The operation of the disconnector in the gas insulated substation (GIS) may produce very fast transient overvoltage (VFTO), which has the characteristics of short rise time, short duration, high amplitude and rich frequency components. VFTO can cause damage to GIS and secondary equipment, and the frequency components contained in the VFTO can cause resonance overvoltage inside the transformer, so it is necessary to study the spectral characteristics of the VFTO. From the perspective of signal processing, VFTO is a kind of non-stationary signal, the traditional Fourier transform is difficult to describe its frequency which changes with time, so it is necessary to use time-frequency analysis to analyze VFTO spectral characteristics. In this paper, we analyze the performance of short time Fourier transform (STFT), Wigner-Ville distribution (WVD), pseudo Wigner-Ville distribution (PWVD) and smooth pseudo Wigner-Ville distribution (SPWVD). The results show that SPWVD transform is the best. The time-frequency aggregation of SPWVD is higher than STFT, and it does not have cross-interference terms, which can meet the requirements of VFTO spectrum analysis.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shuai Li, Shuai Li, Shiming Liu, Shiming Liu, Qiyan Huang, Qiyan Huang, Chuanshun Fu, Chuanshun Fu, } "Study on time-frequency analysis method of very fast transient overvoltage", Proc. SPIE 10615, Ninth International Conference on Graphic and Image Processing (ICGIP 2017), 1061558 (10 April 2018); doi: 10.1117/12.2304669; https://doi.org/10.1117/12.2304669
PROCEEDINGS
6 PAGES


SHARE
RELATED CONTENT

Higher-order Wigner distributions
Proceedings of SPIE (November 29 1992)
Optimal kernels for time-frequency analysis
Proceedings of SPIE (October 31 1990)
Jet noise analysis by Gabor spectrogram
Proceedings of SPIE (April 16 2006)
Particle Analyzer Using Fourier Techniques
Proceedings of SPIE (December 31 1986)

Back to Top