Improvement of Nanodieleetrics for Power Cables

Silicone polymers inherently have good electrical insulating qualities. It is non-conductive due to its chemical nature and when combined with suitable fillers and additives it is used to produce rubber for a variety of electrical insulation applications. Inorganic fillers have attracted wide attention to improve the electrical properties of polymer insulating materials. In order to improve the electrical performance of polymeric silicone rubber insulators used in high-voltage transmission lines, micron- and nano-sized inorganic fillers have been added to the silicone rubber matrix. To improve the electrical properties of silicone rubber, an aluminum oxide (Al2O3) filler was added. In this paper, silicone rubber (SIR) composite samples were prepared by mixing nano-Al2O3 with content of 1, 3, 5 and 7 wt%. The dielectric strength of the compounds is tested under various conditions such as dry, wet, humid low salinity and wet high salinity conditions. The optimum concentration of Al2O3 nano-filler that could improve the dielectric strength of SIR was estimated using Hybrid Gray Wolf and Cuckoo Search Optimization Algorithm (GWCSOA) technology. The results indicate that the electrical performance of the nanocomposites increases with increasing filler concentration.