Dielectric Strength and Patterns of Partial Discharges in Nanocomposites Insulation of Three-Core Belted Power Cables

Formulation of voids and impurities inside the power cable insulation may be found based on fabrication or installation processes that lead to the formation of high electrical stress and collapse of the insulation material of the power cable with cable aging. In this research, it has been investigated on possibility of nanoparticles for developing polyvinyl chloride that is used in power cable fabrication. Therefore, new polyvinyl chloride (PVC) nanocomposites have been fabricated and experimentally tested under high voltage tester. In this paper, it has been investigated on the effect of nanoparticles on electrostatic field distribution inside three-core power cables insulation in presence of air, water and copper impurities with different shapes (rectangle, circle and ellipse). Finite element method has been used to calculate the electrostatic field distribution in power cable insulation. This research success to design innovative patterns of polyvinyl chloride insulation materials for enhancing the electrical stress according to type and concentration of nanoparticles. Also, a comparative study of partial discharges in three-core power cables has been investigated on conventional PVC structure material and new nanocomposites industrial materials.