Title :
Study on partial discharge of metallic outshoot insulation defect in GIS
Author :
Qian, Zhou ; Ju, Tang ; Zhongrong, Xu ; Yanhui, Meng ; Xiaoxing, Zhang
Author_Institution :
Key Lab. of High Voltage Eng., Chongqing Univ., China
Abstract :
Detection of partial discharge (PD) signals in gas-insulated substation (GIS) is a comprehensive research project. In this paper, physical model and corresponding mathematical model of metallic outshoot insulation defect oh enclosure are established and studied for PD in GIS using UHF method, which are based on the characteristics of metallic outshoot insulation defect and UHF inner-loop sensor. The parameters of the mathematical model are given according to data fitting method, and the validity of PD mathematical model in UHF is proved by fitting error, power spectrum and FFT analysis. In the end, applications of the PD mathematical model and complex wavelet transform for restraining white noise are illustrated.
Keywords :
fast Fourier transforms; gas insulated substations; insulator contamination; insulator testing; partial discharge measurement; white noise; FFT analysis; GIS; PD mathematical model; UHF inner-loop sensor; complex wavelet transform; data fitting method; gas-insulated substation; metallic outshoot insulation defects; partial discharge detection; power spectrum; white noise; Circuits; Geographic Information Systems; Insulation; Laboratories; Mathematical model; Nonlinear equations; Partial discharges; System testing; Voltage; Wavelet transforms;
Conference_Titel :
Electrical Insulating Materials, 2005. (ISEIM 2005). Proceedings of 2005 International Symposium on
Print_ISBN :
4-88686-063-X
DOI :
10.1109/ISEIM.2005.193581
