Effect of nano filler concentration on leakage current and partial discharge properties of zepoxy nano composites

Abstract

Electrical insulation materials play a key role in stable and uninterrupted operation of electrical power system. Researchers working in the field of electrical insulation have turned their focus to nano composite insulation materials for better performance and reliability. A typical nano composite insulation material is a combination of nano particles and base materials. Since last 25 years silicon rubber and epoxy are two widely used electrical insulation materials for outdoor and indoor applications respectively. To further enhance the electrical insulation performance of these materials addition of nano particles has proven to be of practical value. This study presents an investigation on zepoxy (a military grade epoxy) incorporated with three different nano particles at varying percentages. The main aim was to find the nature of relationship between leakage current (LC) and partial discharge (PD). In addition to that optimum composition which results in lowest values of PD and LC was also investigated for each of three nano composites. The results of this study help to understand the interdependence between LC and PD for indoor electrical insulation based on zepoxy. LC and PD play a vital role in condition assessment of any insulation material.

The tracking and erosion performance of silicone rubber incorporated with novel TiO2@SiO2 core-shell nano fillers under the IEC 60587 standard

“…As reported by many researchers previously, this study also indicated that every NP has an optimum concentration threshold at which it gives maximum benefit. This percentage is usually below 1 percent by weight in the for many kinds of base material [20][21][22]26].…”

“…Further investigation was done in [21] and showed that at 0.6% of TiO 2 @SiO 2 particles in epoxy gives best results. In another study [22] the optimal filler loading of SiO 2 , TiO 2 and TiO 2 @SiO 2 nano-fillers in zepoxy for achieving minimum values of partial discharge and leakage current was investigated. TiO 2 @SiO 2 has shown better performance in epoxy when compared to any other nano filler mentioned above.…”

Electro mechanical properties changes of LDPE doped with industrial type MgO for cable insulation purposes

“…This cloud will act as an electrostatic barrier, and with the assist of the other scattered traps, they will counter the carrier's mobility, hence improving the volume resistivity. Oppositely, at excessive filler contents, agglomeration probabilities increased and trapping energy minimized; consequently, the conductance improves and the resistivity decreases [17], [18].…”

A review on polymeric insulation for high‐voltage application under various stress conditions

“…The interaction of the fillers and polymers has an impact on the chemical and physical properties. [ 28–30 ]…”

“…The interaction of the fillers and polymers has an impact on the chemical and physical properties. [28][29][30] During long-distance power transmission, the electronic circuits involved stress the cable insulation significantly. Therefore, to employ environment-friendly dielectric materials, materials such as RCP needs to be explored.…”