Application of Superluminescent Light Emitting Diode to Electrooptic Modulator Based PD Continuous On-line Monitoring System


Tian, Y, Lewin, P L, Wilkinson, J S, Sutton, S J and Swingler, S G (2005) Application of Superluminescent Light Emitting Diode to Electrooptic Modulator Based PD Continuous On-line Monitoring System. In, XIVth International Symposium on High Voltage Engineering, Beijing, China, 25 - 29 Aug 2005. Tsinghua University Press, CD-ROM.

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Description/Abstract

Partial discharge monitoring provides effective evaluation of power cables, particularly of joints that are installed on site. Continuous on-line monitoring can provide information about progressing degradation under operational stresses, thus reducing the likelihood of breakdown. A novel PD continuous online monitoring technique has been developed by the authors. The mechanism applies PD signals across a LiNbO3 electro-optic modulator to modulate the intensity of the transmitted light. This technique does not require a voltage supply near the cable joints as the EO modulator is passive. In earlier investigations a fibre laser was used as the light source. The polarisation state of the laser light needs to be maintained to suit the polarisation dependent EO modulator. This paper investigates the application of a superluminescent light emitting diode, which provides unpolarised light, as the light source. The alternative monitoring system is investigated using both simulated experiments and practical PD tests on a 132 kV prefabricated cable joint.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 25-29 August 2005
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science
Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
Faculty of Physical Sciences and Engineering > Electronics and Computer Science > EEE
ePrint ID: 261169
Date Deposited: 01 Sep 2005
Last Modified: 27 Mar 2014 20:04
Publisher: Tsinghua University Press
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/261169

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