Miguel S. Garcia

Electrical Engineer, MSc. MIET


Welcome to my blog

I will be using this blog to interact with you about science news and electrical engineering subjects, expanding on some of the topics in it and posting on some of the ideas related to my researches. This is a great place for you to get to know me and to learn about renewable resources, electricity and HVDC projects.

(UHMWPE): Dielectric Strength and Space Charge Characteristics

September 24, 2013miguelsepulvedagarcia@yahoo.es0 Comments

In order to replace old insulation systems based on oil-paper, other materials, such as low density polyethylene (LDPE), high density polyethylene (HDPE) and specially, crosslinked polyethylene (XLPE), have been used. Characterization of new polymeric materials potentially useful for HVDC power cables is an interesting research topic to work on. In this paper, one material whose previous applications have been far away from power engineering, has been studied: Ultra high molecular weight polyethylene (UHMWPE). Firstly, UHMWPE has been characterized in terms of statistical dielectric strength. Moreover, space charge generation and transport has been analysed in an accelerated electrical ageing experiment in order to compare UHMWPE to other polymeric materials such as XLPE or LDPE. In order to measure space charge profiles, the pulsed electroacoustic (PEA) technique has been applied to polymer sheets withstanding more than 80kV/mm DC for more than 10 days.


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