Tracing the transition of Insulating Oil application in Transformers

This study undertakes a comprehensive investigation to explore strategies for replacing current dielectric liquid understanding in transformers. Understanding existing literature fosters creativity and effective research responses. The review process incorporates data and text analysis. Statistical data from 1978 to 2022 is used to understand prevailing techniques, drawn from an analysis of 80+ research publications. Contributions include Ageing 34 %, blending 20 %, additive addition 17 %, modification 8 %, gas analysis 5 %, critical dielectric testing 5 %, case studies 2 %, and others 8 %. The discussion includes 16 exclusive review papers, highlighting contributions to mixed dielectrics, nanofluids, testing manuals, modifications, and alternative fluids. This advanced study integrates materials, techniques, and standards to explore dielectric liquids, supported by accessible research journal data. The paper provides crucial data for future research.