Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Liquid water stressed with HV impulses : effect of polarity on transient pre-breakdown processes

Hogg, Michael and Timoshkin, Igor and Given, M and Wilson, Mark and Macgregor, Scott and Fouracre, Richard and Lehr, J. (2011) Liquid water stressed with HV impulses : effect of polarity on transient pre-breakdown processes. In: Proceedings of the 17th IEEE International Conference on Dielectric liquids. UNSPECIFIED. ISBN 978-82-594-3525-5

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The complexity of the impulse breakdown of liquid water is reflected by the dependency of pre-breakdown processes on the polarity, rise-time and wave-shape of the applied impulses as well as on physical properties, such as electrical conductivity of water itself. Further understanding of the mechanisms of formation and propagation of impulse discharges in water and water solutions is therefore required to enable the development of pulsed power and plasma technologies. The paper presents a study of the dielectric behaviour of water stressed with high voltage impulses in a point-plane electrode topology. Water with different conductivities including distilled water, tap water and a water based ionic solution was investigated. The volt-time breakdown characteristic of water is discussed and the prebreakdown time and nominal breakdown velocity have been obtained for both positive and negative polarity impulses. Potential breakdown mechanisms which can explain the observed polarity effects in the transient pre-breakdown processes in liquid water stressed with high voltage impulses are discussed.