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Y. Z. Arief
Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
Computer Science & IT Electrical & Electronics Engineering

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Characteristics of Mineral Oil-based Nanofluids for Power Transformer Application I. H. Zakaria; M. H. Ahmad; Y. Z. Arief; N. A. Awang; N .A. Ahmad
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 3: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (447.559 KB) | DOI: 10.11591/ijece.v7i3.pp1530-1537

Abstract

Trends in the field of nanomaterial-based transformer oil show most of the conducted works have focused only on the transformer oil-based nanofluids but limited studies on the stability of transformer oil-based nanofluids. Since mineral oil-based nanofluids still can produce the sedimentation, thus the cold-atmospheric pressure plasma method is proposed to functionally modify the Silicon Dioxide (SiO2) nanofiller in order to enhance the electrical properties of the mineral oil-based nanofluids. The AC breakdown strength oil samples before and after modification were measured. It was found that the plasma treated nanofluids have higher AC breakdown voltage compared to pure oil and untreated nanofluids. Also, Fourier Transform Infrared (FTIR) Spectroscopy has been used in this study to analyse the physical changes of oil samples. It is envisaged that the added silica nanofiller has significant effect on electrical properties of the transformer oil-based nanofluids which would enable to the development of an improved class of liquid dielectric for the application of power transformer.
Fractal Characteristic of Electrical Trees Grown in Silicone Rubber under Environmental Stress M. S. Mohd Fua’ad; M.H. Ahmad; Y. Z. Arief; N. A. Ahmad
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 3: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (534.992 KB) | DOI: 10.11591/ijece.v7i3.pp1628-1632

Abstract

One of the degradations of insulation is in the form of electrical treeing in which classified as a pre-breakdown phenomenon of electrical insulation. The electrical tree is commonly forming in the shape of tree-like or root-like which may have fractal structures. Due to this fractal structure, electrical treeing formation and patterns are analysed via fractal dimension and lacunarity to study the self-similarity patterns of electrical treeing. Many types of research have been conducted to study the fractal dimension and lacunarity of electrical treeing to fully understand the electrical tree mechanism and characteristics. However, fractal and lacunarity structures of
Co-Authors I. H. Zakaria M. H. Ahmad M. S. Mohd Fua’ad M.H. Ahmad N .A. Ahmad N. A. Ahmad N. A. Awang