Partial Discharge Detection and Analysis of Oil-paper Insulation under DC Voltage Based on UHF Method

被引：0
|
作者：
Zhang, Qian [1 ]
Liu, Hongliang [2 ]
Ii, Zhe [1 ]
Wang, Zhihao [1 ]
Yin, Yi [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Sch Elect & Elect Engn, Shanghai 200240, Peoples R China
[2] Hebei Elect Power Co Res Co Inst, Hebei, Peoples R China
来源：
PROCEEDINGS OF 2014 INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATING MATERIALS (ISEIM 2014) | 2014年
关键词：
partial discharge; DC; UHF method; FFT; CWT;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Partial discharge (PD) was an important factor of insulation deterioration and breakdown. UHF signals with frequency ranking of 3GHz would be produced when PD occured. Five typical PD geometries including needle-plate, suspended particle, surface discharge 1, surface discharge 2 and bound cavity had been designed to investigate the characteristics of PD under DC stress. And a UHF signal detection system of PD under DC stress had been established in the experiment. A series of UHF signals of PD in oil-paper insulation were recorded by the detection system. Characteristics in time domain, frequency domain and time-frequency domain of UHF signals based on different geometries and different polarities of dc were analyzed and compared through Fourier transform and wavelet transform. Frequency bandwidths with predominant content seem to be different for UHF signals generated by different geometries. While spectrums appear similar for UHF signals generated by the same PD geometry with different polarity of DC and different scales of voltage. The distribution of signal energy looks different as time and frequency.
引用
收藏
页码：204 / 207
页数：4
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