Abstract
Recently, nanofluids are introduced in the power utilities for the dielectric performance enhancement of power transformer oil. The compactness and fault improvement of the power transformers has resulted in the necessity of next-generation insulating fluid with inflated dielectric properties. This article investigates the dielectric performance of the novel ester oil-based magnetic nanofluids with different nanoparticles under different electric stress conditions. Two biodegradable fluids used as the base liquid for the experiment are synthetic ester oil and natural ester oil while three magnetic nanoparticles used to synthesize nanofluids are iron (II, III) oxide, cobalt (II, III) oxide, and iron phosphide. The concentrations of the nanoparticles are varied to optimize the characteristics of the prepared nanofluids. The dielectric breakdown and relative permittivity of the nanofluids have been experimentally investigated. Further, the breakdown predictions have been performed using Weibull statistical distribution-based regression analysis. The experimental results show the improvement in the characteristics of prepared nanofluids with the change in nanoparticle concentration as compared with the host fluids.
Highlights
The power transformer is the heart of the electric power system due to vast applicabilities in the generation, transmission, and distribution levels
The reliable and efficient operation of the electrical power transformer significantly depends on its insulation characteristics, as it constitutes the major portion of the transformer failure
The enhancement in the breakdown strength needs to be investigated to evaluate the performance of NF with the increase in NP concentration
Summary
The power transformer is the heart of the electric power system due to vast applicabilities in the generation, transmission, and distribution levels. Hussain et al.: Dielectric Performance of Magneto-NFs for Advancing Oil-Immersed Power Transformer for improved quality of insulating oil and has become an important part of the research. Nanofluids (NFs) are described as the colloidal suspension of nanoparticles (NPs) with the size between 1 to 100 nm evenly dispersed in the insulating medium which can be created either by chemical or physical processes [6] It has anomalous physical, and thermal transport properties. Magneto-Nanofluids (ferrofluids) contain evenly distributed NPs-based fluid which use magnetic NPs to achieve superior dielectric property for transformer oil [8]. The determined performance provides the NF applicability as a conventional transformer oil replacement All these characteristics of the prepared NFs and other NFs have been investigated and discussed.
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