Temperature Effect on Electrical Treeing and Partial Discharge Characteristics of Silicone Rubber‐Based Nanocomposites

Abstract

This study investigated electrical treeing and its associated phase-resolved partial discharge (PD) activities in room-temperature, vulcanized silicone rubber/organomontmorillonite nanocomposite sample materials over a range of temperatures in order to assess the effect of temperature on different filler concentrations under AC voltage. The samples were prepared with three levels of nanofiller content: 0% by weight (wt), 1% by wt, and 3% by wt. The electrical treeing and PD activities of these samples were investigated at temperatures of 20°C, 40°C, and 60°C. The results show that the characteristics of the electrical tree changed with increasing temperature. The tree inception times decreased at 20°C due to space charge dynamics, and the tree growth time increased at 40°C due to the increase in the number of cross-link network structures caused by the vulcanization process. At 60°C, more enhanced and reinforced properties of the silicone rubber-based nanocomposite samples occurred. This led to an increase in electrical tree inception time and electrical tree growth time. However, the PD characteristics, particularly the mean phase angle of occurrence of the positive and negative discharge distributions, were insensitive to variations in temperature. This reflects an enhanced stability in the nanocomposite electrical properties compared with the base polymer.

Temperature and trap distribution dependence of electrical tree growth characteristics in polypropylene/elastomer blends for recyclable cable insulation

“…The temperature effect on treeing behaviour may be suggested as follows. With the rise of temperature, more carriers are expected to be injected or extracted from the electrode, which leads to the acceleration in PP deterioration and initiation of the electrical tree [39]. The dielectric strength of the polymer is also weakened, the relationship between the breakdown strength and the temperature can be illustrated by the following equation [40]:…”

Partial Discharge and Breakdown Strength of Plasma Treated Nanosilica/LDPE Nanocomposites

“…Despite this, the PD magnitude are lower than A0 sample. However, B5 sample depicts the higher PD magnitude among B1 and B3 samples; this is due to the higher filler concentration which contributes to the space charge trapping [11] also the formation of agglomeration in LDPE nanocomposites sample. It can be seen in Fig.…”

Investigation of partial discharges in non-woody kenaf based pressboard under influence of moisture

“…In the third hour, the burst PD was observed and the KPP0 varied. The sudden changes in PD magnitudes are known as bursts, and they happened during PD distribution fluctuations, indicating that activity of space charge increased during rapid increasing in PD occurrences [33]. The PD magnitude gradually dropped following the PD burst until the experiment's completion.…”