Vegetable oil based liquid nanocomposite dielectric

Abstract

Physically smaller dielectric materials would improve the optimisation of space for power systems. Development of nanotechnology provides an effective way to improve the performances of insulating oils used in power system applications. In this research study, we focused on the development of nanomodified vegetable oils to be used in power transformers. Higher conduction currents were observed in virgin linseed oil than in virgin castor oil. However, for both virgin linseed and virgin castor oil, the DC conduction current increased approximately linearly with the applied DC voltage. In nanomodified linseed oil, the characteristic curve showed two distinct regions: a linear region (at lower applied voltage) and a saturation region (at slightly higher voltage). Conversely, in nanomodified castor oil, the characteristic curve showed three distinct regions: a linear region (at lower applied voltage), a saturation region (at intermediate applied voltage) and an exponential growth region (at higher applied voltage). The nanomodified linseed oil exhibited a better dielectric performance than the nanomodified castor oil. Overall, the addition of nanodielectrics to vegetable oils decreased the dielectric performance of the vegetable oils. The results of this study contribute to the understanding of the pre-breakdown phenomenon in liquid nanocomposite dielectrics.

Improvement of thermal properties of pigmented acrylic resin using silica aerogel

“…The SEM technique is used to observe the morphology of the silica aerogel particles in the acrylic resin bulk. The similar structure of the aerogel particles can be observed in the research studies carried out by Chetty et al . and Gupta and Ricci .…”

Statistical Investigation of AC Dielectric Strength of Natural Ester Oil-Based Fe3O4, Al2O3, and SiO2Nano-Fluids

“…The fact that, these nanoparticles do not always improve the dielectric strength of natural ester, has been also reported by others [32]. By considering virgin linseed and virgin castor, Chetty et al [32] observed that the addition of 5 wt% of silica aerogel powder nanoparticles increased the streamer activity.…”

State-of-Art in Nano-Based Dielectric Oil: A Review

“…The volume resistivity of nano-modified vegetable oil [73], [143] and BN or Fe 2 O 3 modified insulating oil has been analyzed over frequency [87]. The resistivity influence on nanoparticle of silica aerosol on castor oil can be a measurement of DC conduction current [147], [148].…”