Abstract
This paper intends to prepare a nanofluid sample by suspending Multi-walled Carbon Nanotubes (MWCNTs) at 0.005g/L concentration and analyze the behavior of electrical and dielectric properties based on the International Electrotechnical Commision test method. In order to validate the effectiveness of MWCNT nanofluid, alternating current breakdown voltage (BDV), negative polarity lightning impulse (LI), dielectric permittivity, dissipation factor (DF), DC resistivity and Raman structural measurement are executed accordingly. In the following, an analysis of the statistical distribution using the two-parameter Weibull distribution law of BDV and LI are evaluated at four experimental conditions to predict the probability of breakdown occurring at different percentages. Based on the observation, the MWCNT filler has a substantial effect in improving the BDV and LI characteristics of disposed mineral oil. The permittivity, DF and resistivity performance of MWCNT nanofluid from 25 °C to 90 °C also produces comparable and reliable performance as a fresh transformer oil. As for Raman structure, the revolution of transformer oil by doping MWCNT does not disrupt the original chemical structure of mineral oil. Hence, this study proves the improvement of the electrical and the behavior of dielectric properties and chemical structure of nanofluid, providing a huge contribution towards the development of insulating materials for transformer application.
Highlights
Expanding interest for electric power has prompted the development of transformers with exceptional protection
Laboratory experiments on the breakdown voltage (BDV) and lightning impulse (LI) characteristics of disposed mineral oil (MO) (Sample A), filtered (Sample B), treated MO according to IEC standard (Sample C) and proposed Carbon Nanotubes (CNTs)-based MO
Statistical variations in different sets of data obtained from the BDV and LI breakdown voltage test are analyzed using the two-parameter Weibull distribution to predict the probability breakdown failure at different circumstances
Summary
Expanding interest for electric power has prompted the development of transformers with exceptional protection. Some other researchers studied around improving electrical properties, dielectric properties and thermal efficiency of mineral and natural ester oil by suspending various types of nanoparticles. Nanotubes (CNTs) with high thermal conductivities display greatly improved maintenance of transformers by improvising the predictability of the insulating oil performance. LI tests have demonstrated a slight improvement, and alsoof a tendency to MWCNT nanofluid-based mineral oil, while the third part consists of the observation the chemical decrease in the previous studies. Detailed analysis reveals that the kind of nanomaterials as well as structure behavior of transformer oil before and after the dispersion process occurs Their surface chemistry has a significant impact on the result of the electrical properties. Sample Preparation disposed mineral oil by adding some nanomaterial to enhance its electrical and dielectric performance, as outlined by the IEC standard. Brand Name: DIALA S3 ZX-I structure behavior of transformer oil before and after the dispersion process occurs
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