Study on the Dielectric Performance of XLPE Nanocomposite Against The Electrical Tree Propagation

Currently, XLPE is widely used in underground high voltage cable. Recently, a few nanofillers have been selected by numerous researchers to enhance the electrical tree resistance in polymer matrix. The investigation on the electrical trees properties of unfilled XLPE and XLPE filled with ZnO, hybrid nanocomposite and Al
₂
O
₃
nanofillers have been carried out and described in this paper. The needle-plane electrodes were employed in this study with gap of 2mm between the electrodes. A digital camera and microscope system were used to observe the structure and growth of the electrical tree in XLPE nanocomposite. The properties of electrical trees in XLPE/ZnO, XLPE/Al
₂
O
₃
and hybrid nanocomposite were compared to the unfilled one. The hybrid nanconposite improve the performance of the insulator by inhibit the rapid growth of electical tree. The TIV for hybrid nanocomposite is 12.32% higher than the unfilled XLPE.