The University of Southampton
University of Southampton Institutional Repository

Application of electro-optic modulation technique for PD monitoring of power transformers

Hao, L., Lewin, P.L., Tian, Y., Wilkinson, J.S., Swingler, S.G. and Sutton, Simon (2006) Application of electro-optic modulation technique for PD monitoring of power transformers At 2006 IEEE Symposium on Electrical Insulation. 11 - 14 Jun 2006.

Record type: Conference or Workshop Item (Paper)


Partial discharge (PD) detection is an important technique for assessing the health of high voltage power transformers. A partial discharge signal within an oil-filled power transformer may reach a winding first, then travel along the winding to the bushing core bar. The bushing, acting like a capacitor, can transfer the high frequency components of the partial discharge signal to its tap point. Previous published work [1] has shown that these high frequency components at the bushing tap point can be detected using a suitable sensor and transmitted to remote digital equipment for on-line analysis. In a high voltage substation there is often excessive electrical noise which may corrupt any measured PD signal from the bushing tap point as the bushing acts as an antenna. If signal transmission is implemented using standard coaxial cables this can result in further corruption of the PD signal. The use of optical transmission techniques therefore has clear advantages not only through improved noise immunity but also because it realises electrical isolation and improved operator safety. This paper details the application of an electrooptic modulator to generate transmission signals over polarization maintaining optical fibre from the measurement point. The feasibility of this approach has been investigated using PD signals measured at the tap point of a 60kV bushing, two different PD sources have been used and in both cases it was possible to detect PD activity above 40pC.

PDF 3857.pdf - Other
Download (1MB)

More information

e-pub ahead of print date: June 2006
Venue - Dates: 2006 IEEE Symposium on Electrical Insulation, 2006-06-11 - 2006-06-14
Organisations: Optoelectronics Research Centre, EEE


Local EPrints ID: 47763
ISBN: 1424403332
PURE UUID: f2dae01b-461b-45a0-a2ba-be004c6376c0
ORCID for J.S. Wilkinson: ORCID iD

Catalogue record

Date deposited: 09 Aug 2007
Last modified: 17 Jul 2017 15:02

Export record


Author: L. Hao
Author: P.L. Lewin
Author: Y. Tian
Author: J.S. Wilkinson ORCID iD
Author: S.G. Swingler
Author: Simon Sutton

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.