A Review on Nanocomposite Based Electrical Insulations

摘要

The potential of nanocomposites have been drawing the intention of the researchers from energy storage to electricalinsulation applications. Nanocomposites are known to improve dielectric properties, such as the increase in dielectricbreakdown strength, suppressing the partial discharge (PD) as well as space charge, and prolonging the treeing, etc. Inthis review, different theories have been established to explain the reactions at the interaction zone of polymer matrixand nanofiller; the characterization methods of nanocomposites are also presented. Furthermore, the remarkablefindings in the fields of epoxy, cross-linked polyethylene (XLPE), polypropylene and polyvinyl chloride (PVC)nanocomposites are reviewed. In this study, it was observed that there is lack of comparison between results of labscale specimens and actual field aged cables. Also, non-standardization of the preparation methods and processingparameters lead to changes in the polymer structure and its surface degradation. However, on the positive side, recentattempt of 250 kV XLPE nanocomposite HVDC cables in service may deliver a promising performance in the comingyears. Moreover, materials such as self-healing polymer nanocomposites may emerge as substitutes to traditionalinsulations.