scholarly journals Electrical Treeing in Polymer Nanocomposites

2009 ◽  
Vol 10 (2) ◽  
Author(s):  
Sridhar Alapati ◽  
M. Joy Thomas
Keyword(s):  
Epoxy Resin ◽  
Polymer Nanocomposites ◽  
Tree Growth ◽  
Polymer Nanocomposite ◽  
Growth Patterns ◽  
Nano Silica ◽  
Electrical Tree ◽  
Base Polymer ◽  
Time Required ◽  
Electrical Treeing

This paper presents a study of electrical treeing phenomena in polymer nanocomposites. The polymer nanocomposite studied consists of epoxy resin as base polymer and silica as nano filler. Treeing experiments were performed at a constant ac voltage of 20kV, 50Hz on epoxy samples without any fillers as well as epoxy silica nano composites with 1% by weight of nano silica. Times for tree inception as well as tree growth patterns were studied. The results show that addition of small amount (1% by weight) of nano silica particles in epoxy resin can improve the treeing resistance by delaying the tree inception time as well as the time required by the tree to reach the opposite electrode. Treeing phenomena has been analyzed and interpreted by a physical model to explain the behavior in nanocomposites. The nature of bonding at the interface between epoxy and nano filler is characterized by using FTIR spectrometry. It has been shown that the type of bonding at the interface has an influence on the electrical tree growth pattern.

scholarly journals Influence of Organo-Montmorillonite on Electrical Tree Parameters in Epoxy Resin Under Ac Ramp Voltage

2013 ◽  
Vol 64 (4) ◽  
Author(s):  
Mohd Hafiez Izzwan Saad ◽  
Mohd Hafizi Ahmad ◽  
Yanuar Z. Arief ◽  
Hussein Ahmad ◽  
Mohamed Afendi Mohamed Piah
Keyword(s):  
Epoxy Resin ◽  
Breakdown Voltage ◽  
Polymer Nanocomposite ◽  
Weight Percentage ◽  
Electrical Tree ◽  
Base Polymer ◽  
Ramp Voltage ◽  
Comparative Results ◽  
Inception Voltage ◽  
Electrical Treeing

This paper discusses the effects of nanofiller on electrical treeing growth in polymer nanocomposites. The polymer nanocomposite consists of epoxy resin as the base polymer and organo-montmorillonite as the nanofiller. The influence of this nanofiller on the electrical treeing breakdown resistance was investigated experimentally. The quantity of organo-montmorillonite were added in epoxy resin by ultrasonication method based on weight percentage (wt%). The weight percentages used in this experiment were 0 wt% and 1 wt%, respectively. All the samples were produced in the form of leaf-like specimens which were categorized into two parts: unfilled sample (0 wt%) and filled sample (1 wt%). Point-to-plane samples were subjected to 0.5 kVrms/s HVAC ramp voltage. The data of tree inception voltage and tree breakdown voltage were collected and comparative results were made and presented. The morphological analysis of epoxy nanocomposites were investigated using field emission scanning electron microscopy (FESEM). Electrical tree parameters analysis has shown that the existence of organo-montmorillonite in epoxy resin could exhibit significant improvement of tree characteristics of epoxy resin nanocomposites as the nanofiller contributed to the increase of tree inception voltage and tree breakdown voltage.

scholarly journals Temperature Effect on Electrical Treeing and Partial Discharge Characteristics of Silicone Rubber-Based Nanocomposites

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Mohd Hafizi Ahmad ◽  
Nouruddeen Bashir ◽  
Zolkafle Buntat ◽  
Yanuar Z. Arief ◽  
Abdul Azim Abd Jamil ◽  
...  
Keyword(s):  
Tree Growth ◽  
Silicone Rubber ◽  
Partial Discharge ◽  
Effect Of Temperature ◽  
Growth Time ◽  
Electrical Tree ◽  
Base Polymer ◽  
Increasing Temperature ◽  
Vulcanization Process ◽  
Electrical Treeing

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.

scholarly journals Application of the Gaussian Mixture Model to Classify Stages of Electrical Tree Growth in Epoxy Resin

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2562
Author(s):  
Abdullahi Abubakar Mas’ud ◽  
Arunachalam Sundaram ◽  
Jorge Alfredo Ardila-Rey ◽  
Roger Schurch ◽  
Firdaus Muhammad-Sukki ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Gaussian Mixture Model ◽  
Mixture Model ◽  
Tree Growth ◽  
Asset Management ◽  
Gaussian Mixture ◽  
Growth Stages ◽  
Insulation Material ◽  
Electrical Tree ◽  
Electrical Trees

In high-voltage (HV) insulation, electrical trees are an important degradation phenomenon strongly linked to partial discharge (PD) activity. Their initiation and development have attracted the attention of the research community and better understanding and characterization of the phenomenon are needed. They are very damaging and develop through the insulation material forming a discharge conduction path. Therefore, it is important to adequately measure and characterize tree growth before it can lead to complete failure of the system. In this paper, the Gaussian mixture model (GMM) has been applied to cluster and classify the different growth stages of electrical trees in epoxy resin insulation. First, tree growth experiments were conducted, and PD data captured from the initial to breakdown stage of the tree growth in epoxy resin insulation. Second, the GMM was applied to categorize the different electrical tree stages into clusters. The results show that PD dynamics vary with different stress voltages and tree growth stages. The electrical tree patterns with shorter breakdown times had identical clusters throughout the degradation stages. The breakdown time can be a key factor in determining the degradation levels of PD patterns emanating from trees in epoxy resin. This is important in order to determine the severity of electrical treeing degradation, and, therefore, to perform efficient asset management. The novelty of the work presented in this paper is that for the first time the GMM has been applied for electrical tree growth classification and the optimal values for the hyperparameters, i.e., the number of clusters and the appropriate covariance structure, have been determined for the different electrical tree clusters.

Electrical tree growth in microsilica-filled epoxy resin

2020 ◽  
Vol 27 (3) ◽  
pp. 820-828
Author(s):  
Siyuan Chen ◽  
Zepeng Lv ◽  
James Carr ◽  
Malte Storm ◽  
Simon M. Rowland
Keyword(s):  
Epoxy Resin ◽  
Tree Growth ◽  
Electrical Tree

scholarly journals Electrical tree growth and partial discharge in epoxy resin under combined AC and DC voltage waveforms

2018 ◽  
Vol 25 (6) ◽  
pp. 2183-2190 ◽  
Author(s):  
Ibrahim Iddrissu ◽  
Simon M Rowland ◽  
Hualong Zheng ◽  
Zepeng Lv ◽  
Roger Schurch
Keyword(s):  
Epoxy Resin ◽  
Tree Growth ◽  
Partial Discharge ◽  
Dc Voltage ◽  
Electrical Tree

A Study on Coconut Shell Powder Filled in Epoxy Resin: A Remedy for Electrical Tree Growth Inhibition

2016 ◽  
Vol 718 ◽  
pp. 36-39 ◽  
Author(s):  
Thanyakon Saithanu ◽  
Amnart Suksri
Keyword(s):  
Epoxy Resin ◽  
Tree Growth ◽  
Coconut Shell ◽  
Potential Candidate ◽  
Electrical Tree ◽  
Solid Insulator ◽  
Tree Length ◽  
Coconut Shell Powder ◽  
Shell Powder

Electrical tree phenomenon is a long term degradation and can be found in solid insulator material. Its phenomenon will degrade the characteristic of insulator and may lead to breakdown. The use of filler in the process of manufacturing for the insulation is very popular method. This paper presents the use of coconut shell powder (CSP) filler in epoxy resin for inhibition of electrical tree growth. The CSP is filled with in ratio of 0.1, 0.3, 0.5, 0.8 and 1.0% by weight. The electrical tree was tested by AC voltage of 15kV and conducted for 30 minutes in this experiment. Experimental results shown that, the pure epoxy resin using as a controlled has tree length of 3.20 mm. While the epoxy resin using CSP filler of 1% by weight has a tree length propagation of 2.10 mm. The shorten length of electrical tree may be affected by the combination of modified permittivity (Ɛ) value of an insulator. Also, this study has shown that the CSP may be a potential candidate as a filler compound to be used as electrical tree inhibition for electrical insulation system.

A 2D CELLULAR AUTOMATA MODEL FOR TREE PROPAGATION IN NANOCOMPOSITES: INFLUENCE OF THE NANOPARTICLES SIZE, LOADING AND THE PRESENCE OF MICROVOIDS

NANO ◽  
2013 ◽  
Vol 08 (01) ◽  
pp. 1350002 ◽  
Author(s):  
DESPOINA PITSA ◽  
MICHAEL G. DANIKAS
Keyword(s):  
Cellular Automata ◽  
Polymer Nanocomposites ◽  
Polymer Nanocomposite ◽  
Epoxy Nanocomposites ◽  
Cellular Automata Model ◽  
Dc Voltage ◽  
Electrical Tree ◽  
Electrical Trees ◽  
Ca Model ◽  
Tree Length

Electrical tree propagation in a polymer nanocomposite is affected by the presence of nanoparticles. A 2D cellular automata (CA) model is presented for the simulation of electrical tree propagation in polymer nanocomposites. The effect of the nanoparticles size, the nanoparticles loading and the appearance of microvoids on electrical tree propagation in titania ( TiO2 )/epoxy nanocomposites under the application of DC voltage is examined with the aid of the CA model. It has been observed that the tree length is affected by nanoparticles size and nanoparticles loading. A resistance in electrical tree propagation has been noticed, as nanoparticles size decreases or as nanoparticles loading increases. The presence of microvoids in the polymer nanocomposite is another factor that has been examined. The propagation of electrical trees that initiate from microvoids in the polymer nanocomposite has also been simulated by the use of the CA model.

scholarly journals Electrical Tree Growth Characteristics in Epoxy Resin With Harmonic Superimposed DC Voltage

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 47273-47281 ◽  
Author(s):  
Boxue Du ◽  
Meng Tian ◽  
Jingang Su ◽  
Tao Han
Keyword(s):  
Epoxy Resin ◽  
Tree Growth ◽  
Growth Characteristics ◽  
Dc Voltage ◽  
Electrical Tree
Sign in / Sign up

Export Citation Format

Share Document