scholarly journals Assessment of creeping discharge initiated by metal particles on the silicone rubber/XLPE interface in cable joints

2019 ◽  
Vol 70 (5) ◽  
pp. 370-378
Author(s):  
Wen-Zhi Chang ◽  
Fei Du ◽  
Jian-Gang Bi ◽  
Shuai Yuan ◽  
Yan-Peng Gong ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Development Process ◽  
Partial Discharge ◽  
Metal Particles ◽  
Severity Level ◽  
Insulation Defect ◽  
Creeping Discharge

Abstract Creeping breakdown caused by metal particles on the silicone rubber/XLPE interface of prefabricated cable joints often happens. Study on the development process of such insulation defect-led partial discharge (PD) can serve as a basis for the assessment of its severity level. In this paper, metal particles are sandwiched on the rubber/XLPE interface of a 35 kV prefabricated cable joint to simulate a creeping defect.

Typical Insulation Defects Simulation and Signal Characteristics Analysis of GIS Partial Discharge

2014 ◽  
Vol 521 ◽  
pp. 394-398 ◽  
Author(s):  
Kang Ning Wang ◽  
Tian Zheng Wang ◽  
Jie Yan
Keyword(s):  
Pulse Current ◽  
High Reliability ◽  
Ultrasonic Method ◽  
Partial Discharge ◽  
Current Method ◽  
Metal Particles ◽  
Signal Characteristics ◽  
Insulation Defect ◽  
Characteristics Analysis ◽  
Long Time

Gas insulated switchgear (GIS) has excellent performances such as small area, not affected by atmosphere, high reliability. So it has been used more and more widely in the power system. However, But the partial discharge (PD) would occur because of insulation defect, PD will lead to the GIS insulation damage after a long time, and will lead to serious consequences without treatment in time, therefore, the PD detection is particularly important. Article simulates the high voltage conductor spikes, basin insulator metal particles on the surface and the shell spike the insulation of the three kinds of typical defects, using the pulse current method and ultrasonic method to test partial discharge signals and get the corresponding signal characteristics, which play a certain guiding significance for field applications.

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.

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