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.
Highlights
One of the key stimulants to the growth of an economy is the availability of affordable and reliable electricity.[1]
Generation plants are generally located at a significant distance from the customer load networks; longdistance transmission systems are implemented at high voltage so as to minimise power losses
We investigated the use of vegetable oils, namely linseed oil and castor oil, in power transformers
Summary
One of the key stimulants to the growth of an economy is the availability of affordable and reliable electricity.[1]. Generation plants are generally located at a significant distance from the customer load networks; longdistance transmission systems are implemented at high voltage so as to minimise power losses. The challenges of high-voltage transmission systems are a wide right of way and long safety clearances. Research over the years in respect of high-voltage transmission systems has been focused on developing innovative ways of modifying the properties of insulation materials.[4] The general approach has been to attempt to use thinner or less material to withstand high electrical stresses.[4] Physically smaller dielectric materials would improve on the optimisation of space for the generation, transmission and distribution of electricity
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