The University of Southampton

On Line Detection of Partial Discharge Activity in HV Cables and Accessories Using Directional Coupling Techniques

Date:
2000-2003
Themes:
High Voltage Engineering, Nanomaterials and Dielectrics, High Voltage Engineering
Funding:
EPSRC, The National Grid Company plc

Previous projects in conjunction with projects currently running have studied the use of capacitive couplers, Radio Frequency Current Transformers and Rogowski coils. The aim of this project is to assess the suitability of directional couplers for on line monitoring in comparison to established methods. A directional coupler is essentially a screened conducting plate placed on the outer layer of the semi-conducting material of the cable, with outputs from each end of the sensor being fed to a scope. Due to both the capacitive and inductive effects between the two plates one output from a sensor will be greater than the other, hence the direction from which the discharge emanated from can be determined. The advantage directional couplers offer over other methods is this two-channel output per each sensor, so discharge sites can be pin-pointed, however also means that twice as much data is collected and then needs to be analysed.

Primary investigators

Secondary investigator

  • Graeme Williams

Partner

  • The National Grid Company plc

Associated research groups

  • Electrical Power Engineering
  • Electronics and Electrical Engineering
Share this project FacebookGoogle+TwitterWeibo

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.

×