Textured Insulators for Overhead Lines and Substations

Completed

Other Power and Storage Technologies(Electricity transmission and distribution)

Basic and strategic applied research
Applied Research and Development

PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials)
ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering)

Not Cross-cutting

Professor A Haddad
Engineering
Cardiff University

Standard

EPSRC

19 November 2008

18 April 2012

41 months

£462,878

Systems engineering

Wales

Energy : Engineering

Professor A Haddad, Engineering, Cardiff University

Mr H Griffiths, Engineering, Cardiff University
Dr N Harid, Engineering, Cardiff University

In this research programme, it is proposed to investigate the effect of texturing the surface of insulating materials on their performance under applied high voltage and outdoor weather conditions. This follows a Cardiff patent for insulating structures having anti-dry band properties and initial experimental work which proved the concept. It is proposed to investigate surfaces having protuberances in the shape of hemispheres arranged in such a way that both the total surface area and the creepage path of the resulting insulation surface are increased significantly. Such texturing can also have the added benefit of improving the hydrophobicity of the surface. Modelling work using analytical and numerical computation techniques will be used to assess the performance of various shapes of texturing with dimensions in the mm and cm ranges. This modelling work will then be used to shortlist candidate textures for experimental work. A vacuum casting facility will be used to prepare flatand insulator samples that will be tested in inclined-plane and pollution-chamber test environments. Various characterisation laboratory tasks, including long term pollution exposure and ageing investigations, will be undertaken in order to classify the various textures. This will involve synchronising visual, electrical and thermal measurements. It is, then, proposed to use the order of merit from the flat samples investigations to select two or three geometries for fabrication of complete insulators. The allter will be used to conduct a comparative test and modelling programme which will demonstrate/assess the superior properties of the textured surface insulator, particularly under polluted conditions. Furthermore, this programme includes investigation tests at an outdoor pollution test station and collaboration with both a UK manufacturer and an overseas academic group

17/12/07