Temperature Dependency of the Dielectric Response of Nanofluid-based Transformer Insulation Systems

In the last decade the interest in the development of nanofluids for electrotechnical applications has raised notably; these fluids provide improvements in some of the main properties of conventional dielectric oils. An important number of authors have studied the properties of different nanofluids and the knowledge about this fluids is significant at the moment. As a further step it is important to study how nanofluids behave when interacting with other transformer components. In this line, the study of the interaction with the Kraft paper that constitutes part of the transformer solid insulation is one of the most important topics to be addressed. The interaction between these materials and the properties of nanofluid-cellulose insulation systems under transformer working conditions should be studied before NFs could be used in real transformers. A study on the dielectric properties of the system is presented in this work which analyses the effect of the operating temperature in the dielectric response of nanofluid-based insulation systems.