Detection of Electrical Tree in Epoxy Resin under Non-uniform DC Electric Field Measured by Current Integrated Charge Method

2020 ◽  
Vol 140 (9) ◽  
pp. 432-438
Author(s):  
Masayuki Fujii ◽  
Koki Matsushita ◽  
Masumi Fukuma ◽  
Shinichi Mitsumoto
Keyword(s):  
Electric Field ◽  
Epoxy Resin ◽  
Electrical Tree ◽  
Dc Electric Field

The alignment of single walled carbon nanotubes in an epoxy resin by applying a DC electric field

Carbon ◽  
2012 ◽  
Vol 50 (7) ◽  
pp. 2453-2464 ◽  
Author(s):  
Marco Monti ◽  
Maurizio Natali ◽  
Luigi Torre ◽  
José M. Kenny
Keyword(s):  
Carbon Nanotubes ◽  
Electric Field ◽  
Epoxy Resin ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Dc Electric Field ◽  
Walled Carbon Nanotubes

scholarly journals Development and distribution of surface charge on epoxy resin under dc electric field in different gases

AIP Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 075011 ◽  
Author(s):  
Wenxia Sima ◽  
Hang Xu ◽  
Potao Sun ◽  
Qianqiu Shao ◽  
Ze Yin
Keyword(s):  
Electric Field ◽  
Surface Charge ◽  
Epoxy Resin ◽  
Dc Electric Field ◽  
Different Gases

The Flashover Phenomena due to Water Drops on Insulating Surface under DC Electric Field

2014 ◽  
Vol 931-932 ◽  
pp. 962-967 ◽  
Author(s):  
Sackthavy Chandavong ◽  
Kittipong Tonmitra ◽  
Arkom Kaewrawang
Keyword(s):  
Electric Field ◽  
Epoxy Resin ◽  
Direct Current ◽  
Water Drop ◽  
Tap Water ◽  
Water Volume ◽  
Electric Field Line ◽  
Insulating Surfaces ◽  
Dc Electric Field ◽  
Water Drops

This paper presents the flashover between the electrodes conducted the current by the water drop on insulating surfaces. It causes ageing to the insulator and leads to deterioration when the insulator is used for over years. In the experiments, epoxy resin with the water drop is tested by using direct current until flashover of 70 kV. Besides that, the effect of the water volume, the number of the water drop and the water types - tap and aqua water on flashover are investigated. The flashover of tap water grows faster when increases the volume of water drop. The flashover of aqua water does not depend on the volume of water drop. The deformation and elongate of water drop is in the direction of electric field line. The results lead to protect the damage of insulator caused by the humidity and the loss of their efficiency insulators.

Temperature dependence of single-walled carbon nanotube migration in epoxy resin under DC electric field

2020 ◽  
Vol 55 (34) ◽  
pp. 16220-16233
Author(s):  
Dandan Zhang ◽  
Connor Saukas ◽  
Yipeng He ◽  
Rumin Wang ◽  
Alan I. Taub
Keyword(s):  
Carbon Nanotube ◽  
Electric Field ◽  
Temperature Dependence ◽  
Epoxy Resin ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Dc Electric Field

Radiated Electro-Magnetic Waves Caused by Electrical Tree Development in Epoxy Resin

2009 ◽  
Vol 129 (12) ◽  
pp. 915-921 ◽  
Author(s):  
Hideki Ueno ◽  
Takashi Nagamachi ◽  
Masaki Nakamura ◽  
Hiroshi Nakayama ◽  
Kunihiko Kakihana
Keyword(s):  
Epoxy Resin ◽  
Electrical Tree ◽  
Electro Magnetic ◽  
Tree Development ◽  
Magnetic Waves

scholarly journals The Development of Electrical Tree Discharge in Epoxy Resin Impregnated Paper Insulation

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 69522-69531
Author(s):  
Yongqiang Wang ◽  
Changhui Feng ◽  
Yu Luo
Keyword(s):  
Epoxy Resin ◽  
Electrical Tree ◽  
Paper Insulation

Nonlinear photoacoustic effect of semiconductors in dc electric field

1990 ◽  
Vol 68 (8) ◽  
pp. 3865-3871 ◽  
Author(s):  
Jian‐chun Cheng ◽  
Shu‐yi Zhang ◽  
Yue‐sheng Lu
Keyword(s):  
Electric Field ◽  
Photoacoustic Effect ◽  
Dc Electric Field

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.

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