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A possible non-contact measuring technique for the variation of the electric field due to corona discharge by use of Pockels sensor

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4 Author(s)
W. J. Kang ; Dept. of Electr. Eng., Hanyang Univ., South Korea ; J. Y. Koo ; Y. S. Lim ; Y. M. Chang

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

Published in:

Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on

Date of Conference:

2001