A Study on Recent Advancement in Dielectric Materials with Respect to High Voltage Engineering Applications

With the increased use of HVDC and HVAC lines in the power system network, the design of power equipment and hardware such as power transformers, indoor insulators, underground cables, etc., needs more suitable dielectric materials to meet the new challenging voltage stress conditions. Also, the industrial applications of high voltage engineering like ESP and pulse power requires a careful investigation of testing parameters for dielectrics to be adopted. Apart from high voltage engineering, dielectric materials find widespread usages in other engineering fields like electronics, photonics, and biotechnologies as electricity storages, supercapacitors, electrostatic capacitors, batteries, etc. In this paper, we will start with a brief introduction and summary of conventional dielectrics with their pros and cons and will proceed toward newly engineered dielectrics suitable from high voltage engineering point of view like polymer composites, nanocomposites, advanced ceramics, nanodielectrics, multilayer structured dielectrics, synthetic ester-based dielectric liquids. Also, we will have a glance on future of dielectrics like graphene-based dielectric and use of AI in dielectric.