High Power Laser and Particle Beams, Volume. 34, Issue 12, 123001(2022)
Time-domain measurement of the transient electric field caused by pantograph-catenary off-line discharge based on D-dot Sensor
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Fig. 1. Schematic diagram of the structure of the transient electric field waveform restoration system
Fig. 4. Square wave source electric field signal and D-dot output differential signal
Fig. 5. Direct integration result of the electromagnetic pulse differential measurement signal after de-averaging
Fig. 7. Input signal and output signal of low frequency compensation identification system
Fig. 8. Comparison of direct integration and compensation after integration
Fig. 9. Transient electric field waveform restoration signal before and after correction factor calibration
Fig. 10. Rising edge of square wave signal before and after reduction
Fig. 11. Results comparison of two transient electric field waveform restoration methods
Fig. 13. D-dot sensor output differential signal and its amplitude spectrum
Fig. 14. Transient electric field waveform restoration system restored electric field signal and its amplitude spectrum
Fig. 15. Transient electric field restoration signals under different excitation voltages
Table 1. Three methods to eliminate root mean square error and correlation coefficient of trend term results
View tableView in ArticleTable 1. Three methods to eliminate root mean square error and correlation coefficient of trend term results
method RMSE correlation coefficient/% least squares 0.420 63.71 wavelet 0.193 84.14 EMD 0.370 72.33
Table 2. Root mean square error and correlation coefficient of the signal before and after low frequency compensation
View tableView in ArticleTable 2. Root mean square error and correlation coefficient of the signal before and after low frequency compensation
state RMSE correlation coefficient/% before compensation 0.041 82.39 after compensation 0.083 94.77
Table 3. Correlation coefficients of transient electric field restoration signals under different excitation voltages
View tableView in ArticleTable 3. Correlation coefficients of transient electric field restoration signals under different excitation voltages
applied voltage/kV correlation coefficient/% 15 93.19 20 94.96 25 93.11
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Zhiyu Li, Hao Li, Hefei Cao, Mengzhe Jin, Man Hu. 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(12): 123001
Paper Information
Category: High Power Microwave Technology
Received: Apr. 5, 2022
Accepted: Sep. 2, 2022
Published Online: Nov. 10, 2022
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