TY - JOUR
T1 - Amplitude and Frequency Characteristics of Electromagnetic Radiation of Series DC Arc Faults Under Low Pressure
AU - Xiong, Qing
AU - Ji, Shengchang
AU - Lu, Weifeng
AU - Zhu, Lingyu
AU - Zhong, Lipeng
AU - Chu, Yanfang
N1 - Publisher Copyright:
© 2017 Chin. Soc. for Elec. Eng.
PY - 2017/2/20
Y1 - 2017/2/20
N2 - To detect series DC arc faults under low pressure, test platform of DC arc faults under low pressure was built, and the characteristics of electromagnetic radiation of DC fault arc under different test conditions were investigated. A fourth-order Hilbert fractal antenna was used to detect electromagnetic radiation signals of DC arc faults. Series DC arc faults generated by 4 kinds of electrode materials including brass, copper, stainless steel and aluminum were tested under 11 pressures (96, 86, 76, 66, 56, 46, 36, 26, 16, 6 and 0.6kPa). And tests of different diameters (1-7mm) and shapes (pointed and flat) of brass electrodes were conducted under low pressure. The influence of moving velocity of electrode on the electromagnetic radiation was considered. Amplitude of electromagnetic radiation pulses measured under different test conditions were analyzed. And fast Fourier transform was applied to electromagnetic radiation pulses to extract characteristic frequency. Test results indicate that the amplitude of electromagnetic radiation pulses of DC arc varies with the pressure, electrode diameter, shape, and moving velocity, which has directivity, while the characteristic frequency range (36-41MHz) of electromagnetic radiation pulses is independent of those parameters, which can be used as a characteristic parameter to detect series DC arc faults in a wide range.
AB - To detect series DC arc faults under low pressure, test platform of DC arc faults under low pressure was built, and the characteristics of electromagnetic radiation of DC fault arc under different test conditions were investigated. A fourth-order Hilbert fractal antenna was used to detect electromagnetic radiation signals of DC arc faults. Series DC arc faults generated by 4 kinds of electrode materials including brass, copper, stainless steel and aluminum were tested under 11 pressures (96, 86, 76, 66, 56, 46, 36, 26, 16, 6 and 0.6kPa). And tests of different diameters (1-7mm) and shapes (pointed and flat) of brass electrodes were conducted under low pressure. The influence of moving velocity of electrode on the electromagnetic radiation was considered. Amplitude of electromagnetic radiation pulses measured under different test conditions were analyzed. And fast Fourier transform was applied to electromagnetic radiation pulses to extract characteristic frequency. Test results indicate that the amplitude of electromagnetic radiation pulses of DC arc varies with the pressure, electrode diameter, shape, and moving velocity, which has directivity, while the characteristic frequency range (36-41MHz) of electromagnetic radiation pulses is independent of those parameters, which can be used as a characteristic parameter to detect series DC arc faults in a wide range.
KW - Electrode materials
KW - Electromagnetic radiation
KW - Hilbert fractal antenna
KW - Low pressure
KW - Series DC arc fault
UR - https://www.scopus.com/pages/publications/85020174126
U2 - 10.13334/j.0258-8013.pcsee.161536
DO - 10.13334/j.0258-8013.pcsee.161536
M3 - 文章
AN - SCOPUS:85020174126
SN - 0258-8013
VL - 37
SP - 1071
EP - 1079
JO - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
JF - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
IS - 4
ER -