Title :
A possible non-contact measuring technique for the variation of the electric field due to corona discharge by use of Pockels sensor
Author :
Kang, W.J. ; Koo, J.Y. ; Lim, Y.S. ; Chang, Y.M.
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., South Korea
Abstract :
In this paper, a novel optical measuring system based on the electro-optic effect has been proposed and realized using a Pockels cell with a view to detecting a partial discharge taking place at the needle plane electrode. This system has the following advantages; nonmetallic probe sensor immune to external EMI noise and broad band response of the Pockels cell from DC to GHz. It consists of a He-Ne laser, optical fiber, LiNbO3 Pockels cell, photodetector, grin lens, oscilloscope and PC. The characteristics of the developed prototype sensor are investigated under AC and corona discharges
Keywords :
Pockels effect; corona; electric field measurement; fibre optic sensors; measurement by laser beam; partial discharge measurement; 10 mW; 100 kHz to 1 GHz; 20 to 1 kV; 5 mm; 50 mm; 632.8 nm; AC discharges; He-Ne; He-Ne laser; LiNbO3; LiNbO3 Pockels cell; Pockels sensor; broad band response; corona discharge; electric field variation; electro-optic effect; external EMI noise immunity; grin lens; needle plane electrode; noncontact measuring technique; nonmetallic probe sensor; optical fiber; oscilloscope; partial discharge detection; photodetector; Electrodes; Electromagnetic interference; Needles; Optical noise; Optical sensors; Partial discharge measurement; Partial discharges; Probes; Sensor phenomena and characterization; Sensor systems;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963503
