Disturbance Elimination for Partial Discharge Detection in the Spacer of Gas-Insulated Switchgears
Abstract
:1. Introduction
2. Insulation Defects in Spacer
3. Experimental Setup
4. Wavelet Transform
4.1. Selection of Mother Wavelet
4.2. The Determination of Decomposition Level
4.3. Decomposition of PRPD and Signal Energy
4.4. Threshold and Thresholding Function
4.5. Signal Reconstruction
5. Results and Discussions
5.1. Simulated PRPD
5.2. PRPD in the POS and the Crack
6. Conclusions
Author Contributions
Conflicts of Interest
References
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Method | Correlation Coefficient | SNR | Reduction in Amplitude [%] |
---|---|---|---|
1 kHz filter | 0.063 | −23.91 | 2.69 |
9 kHz filter | 0.135 | −17.35 | 3.02 |
100 kHz filter | 0.134 | −16.77 | 5.51 |
Wavelet, noisy D1–D5 | 0.141 | −16.76 | 0.19 |
Wavelet, de-noised D1–D5 | 0.814 | 4.17 | 2.30 |
Wavelet, de-noised D1–D8 | 0.813 | 4.09 | 1.70 |
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Wang, G.; Kil, G.-S.; Ji, H.-K.; Lee, J.-H. Disturbance Elimination for Partial Discharge Detection in the Spacer of Gas-Insulated Switchgears. Energies 2017, 10, 1762. https://doi.org/10.3390/en10111762
Wang G, Kil G-S, Ji H-K, Lee J-H. Disturbance Elimination for Partial Discharge Detection in the Spacer of Gas-Insulated Switchgears. Energies. 2017; 10(11):1762. https://doi.org/10.3390/en10111762
Chicago/Turabian StyleWang, Guoming, Gyung-Suk Kil, Hong-Keun Ji, and Jong-Hyuk Lee. 2017. "Disturbance Elimination for Partial Discharge Detection in the Spacer of Gas-Insulated Switchgears" Energies 10, no. 11: 1762. https://doi.org/10.3390/en10111762