Study on dielectric characteristics Of carbon quantum dots treated Nanostructured corn oil for Distribution transformer applications

Abstract

In power transmission and distribution networks, one of the key newlinecomponents is a power transformer which is frequently subjected to high newlinevoltage and high temperature stress. Hence design of effective insulation newlinesystems, particularly liquid insulation which is widely used in distribution newlinetransformers is always a hot research topic. In recent times natural esters have newlinebeen used extensively in medium voltage insulation applications as a newlinereplacement for conventional mineral oil. However, the performance of newlinenatural esters regarding inception and propagation of partial discharges is newlineconsiderably lower than the mineral oils. In some of the earlier works, it is newlinereported that corn oil has good Breakdown Voltage (BDV) and Partial newlineDischarge (PD) characteristics and it is, then, a suitable candidate for newlinereplacing mineral oil. Electrical companies are now expecting natural ester newlinebased nanofluids with improved dielectric properties and higher power newlinedensity. New research findings are being done regarding vegetable oils with newlineaddition of nanofillers and reported the influence of silica nanofillers on the newlineBreakdown strength (BDV), Lighting Impulse (LI) and Partial Discharge newline(PD) characteristics of vegetable oils. newlineNanofiller agglomeration and its stability are the major difficulties newlinefaced by researchers. Oil stability can be improved by surface treatment of newlinenanofillers. Recent research reports suggest that mineral oil including newlinenanoparticles surface treated by carbon quantum dots (CQD) has better newlineinsulation properties. Even partial coverage of CQD on the surface of newlinenanoparticles can improve the uniform dispersion of nanoparticles in oil. newlinePrepared oil samples were kept idle for 92 hours and there is no settlement of newlinenanoparticles seen, which shows improvement in stability of oils newline