Time-domain measurement of the transient electric field caused by pantograph-catenary off-line discharge based on D-dot Sensor

Li Zhiyu; Li Hao; Cao Hefei; Jin Mengzhe; Hu Man

doi:10.11884/HPLPB202234.220172

Volume 34 Issue 12

Nov. 2022

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Li Zhiyu, Li Hao, Cao Hefei, et al. Time-domain measurement of the transient electric field caused by pantograph-catenary off-line discharge based on D-dot Sensor[J]. High Power Laser and Particle Beams, 2022, 34: 123001. doi: 10.11884/HPLPB202234.220172

Citation:

Li Zhiyu, Li Hao, Cao Hefei, et al. Time-domain measurement of the transient electric field caused by pantograph-catenary off-line discharge based on D-dot Sensor[J]. High Power Laser and Particle Beams, 2022, 34: 123001. doi: 10.11884/HPLPB202234.220172

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Time-domain measurement of the transient electric field caused by pantograph-catenary off-line discharge based on D-dot Sensor

doi: 10.11884/HPLPB202234.220172

Li Zhiyu^1
,,
Li Hao^{2, 3},
Cao Hefei¹,
Jin Mengzhe³,
Hu Man³

1.
China Railway Signal & Communication Corp Research & Design Institute Group Co., Ltd, Beijing 100070, China
2.
School of Electrical and Electronic Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
3.
Hebei Key Laboratory for Electromagnetic Environmental Effects and Information Processing, Shijiazhuang 050043, China

Received Date: 2022-04-05
Accepted Date: 2022-09-02
Rev Recd Date: 2022-08-30

Available Online: 2022-11-02

Publish Date: 2022-11-02

Abstract

Abstract

The electromagnetic radiation of pantograph-catenary offline discharge has the characteristics of transient and broadband. We can use the D-dot sensor to measure its transient electric field in time domain. However, the direct integral operation of the differential signal seriously distorts the original signal. To solve this problem, a transient electric field time-domain waveform restoration system including a pulse electric field generating device and a measuring device is built in the laboratory firstly. Then, we propose a time-domain waveform restoration method for transient electric field including DC removal, numerical integration, elimination of trend items and low frequency compensation. Finally, the method is used to test the electric field time domain waveform of electromagnetic radiation of pantograph- catenary offline discharge under different voltages. Theoretical and experimental results show that the proposed method can accurately and stably restore the original time-domain waveform of the transient electric field radiated by off-line discharge of the pantograph. The main frequency components of the reduced signal and the measured differential signal are both at 7.5MHz, and the correlation coefficient between them is more than 93%.
- D-dot sensor,
- transient electric field,
- time-domain measurement,
- pantograph-catenary offline discharge

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References(30)

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