Title :
A novel technique for detecting electromagnetic wave caused by partial discharge in GIS
Author :
Hoshino, Toshihiro ; Kato, Katsumi ; Hayakawa, Naoki ; Okubo, Hitoshi
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
fDate :
10/1/2001 12:00:00 AM
Abstract :
For the insulation diagnosis of GIS, it is necessary to detect partial discharge (PD) under noisy condition and to specify the direction of electromagnetic wave radiation due to PD. We proposed “phase gate control method” for discriminating the electromagnetic wave caused by PD in SF6 gas from external noises. The proposed method enabled us to discriminate PD of about 100 pC in SF6 gas from external noises of more than 10000 pC in air. We also compared polarization characteristics of electromagnetic wave radiated from PD with those from a half-wave dipole antenna, and could estimate the radiation length of electromagnetic wave caused by PD. The results derived in this paper contribute to the insulation diagnosis of GIS on-site
Keywords :
SF6 insulation; conical antennas; dipole antennas; electromagnetic wave polarisation; gas insulated switchgear; insulation testing; partial discharge measurement; GIS; SF6; biconical antennas; electromagnetic wave detection; electromagnetic wave radiation; external noise; half-wave dipole antenna; insulation diagnosis; noisy condition; partial discharge; phase gate control method; polarization characteristics; radiation length estimation; Dipole antennas; Electromagnetic interference; Electromagnetic radiation; Electromagnetic scattering; Electromagnetic wave polarization; Gas insulation; Geographic Information Systems; Partial discharges; Switchgear; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
