The partial discharge inception and breakdown voltage distribution of metal protrusion in SF6 gas

2016 ◽  
Author(s):  
Fei Guo ◽  
Degui Hu ◽  
Junhao Li ◽  
Xutao Wu ◽  
Xiuguang Li ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Partial Discharge ◽  
Voltage Distribution

Calculation Model of Self-Breakdown Voltage Distribution in Gas Switches

2019 ◽  
Vol 47 (9) ◽  
pp. 4335-4341
Author(s):  
Weixi Luo ◽  
Peitian Cong ◽  
Tao Huang ◽  
Rongxiao Zhai ◽  
Ai'ci Qiu
Keyword(s):  
Breakdown Voltage ◽  
Calculation Model ◽  
Voltage Distribution

scholarly journals Impact of Shape and Total of Particle to Characteristics of Partial Discharge and Breakdown Voltage on Oil Insulation in Uniform Field

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Daniar Fahmi ◽  
I Made Yulistya Negara ◽  
R. Wahyudi ◽  
Dimas Anton Asfani ◽  
Made Yudhi Setyawan ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
High Voltage ◽  
Partial Discharge ◽  
Dielectric Strength ◽  
Solid Particles ◽  
Uniform Field ◽  
Negative Corona

Oil insulation is one of the insulation medium types commonly used in high voltage apparatus. This insulation is to separate between the conductive part and non-conductive part. However, oil insulation can experience decreasing of dielectric strength. It may be caused by the presence of solid particles. Therefore, the testing was conducted to obtain the effect of solid particles to characteristics of partial discharge and breakdown voltage of oil insulation. The results generally proved that the existence of solid particles can reduce the breakdown voltage value of oil insulation. In addition, the solid particles led to two types of corona on oil insulation, namely positive and negative corona.

scholarly journals Study on Partial Discharge Characteristics of C6F12O Mixed Gas

2021 ◽  
Author(s):  
Xiajin Rao ◽  
Dajian Li ◽  
Xiaofei Xia ◽  
Yi Su ◽  
Yufeng Lu ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Low Voltage ◽  
Partial Discharge ◽  
Buffer Gas ◽  
Mixing Ratio ◽  
Mixed Gas ◽  
Discharge Characteristics ◽  
Power Frequency ◽  
The Difference ◽  
Inception Voltage

Abstract The greenhouse effect of SF6 increasingly limits its application in various gas insulated equipment. C6F12O combines the advantages of insulation resistance, safety and environmental protection. When mixed with buffer gas, C6F12O is considered to have potential application prospects in medium and low voltage equipment. In this paper, about the partial discharge characteristics of the mixed gas, an experimental study was carried out. The partial discharge initiation voltage and discharge extinction voltage of mixed gas under power frequency voltage are measured and compared with the breakdown voltage. The results show that with the increase of mixing ratio, the partial discharge initiation voltage and extinction voltage of mixed gas gradually increase, and the effect of gas pressure on high mixing ratio is obvious. The difference between the partial discharge inception voltage and the breakdown voltage is larger than that of pure N2. The research in this paper can provide an important reference for the application, operation and protection of C6F12O mixed gas in medium and low voltage equipment.

scholarly journals The Influence of Nanoparticles’ Conductivity and Charging on Dielectric Properties of Ester Oil Based Nanofluid

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6540
Author(s):  
Konstantinos N. Koutras ◽  
Ioannis A. Naxakis ◽  
Eleftheria C. Pyrgioti ◽  
Vasilios P. Charalampakos ◽  
Ioannis F. Gonos ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Partial Discharge ◽  
Al2o3 Nanoparticles ◽  
Sic Nanoparticles ◽  
Base Oil ◽  
Dielectric Performance ◽  
Lightning Impulse ◽  
The Stability ◽  
Inception Voltage ◽  
Natural Ester

This study addresses the effect of nanoparticles’ conductivity and surface charge on the dielectric performance of insulating nanofluids. Dispersions of alumina and silicon carbide nanoparticles of similar size (~50 nm) and concentration (0.004% w/w) were prepared in natural ester oil. The stability of the dispersions was explored by dynamic light scattering. AC, positive and negative lightning impulse breakdown voltage, as well as partial discharge inception voltage of the nanofluid samples were measured and compared with the respective properties of the base oil. The obtained results indicate that the addition of SiC nanoparticles can lead to an increase in AC breakdown voltage and also enhance the resistance of the liquid to the appearance of partial discharge. On the other hand, the induction of positive charge from the Al2O3 nanoparticles could be the main factor leading to an improved positive Lightning Impulse Breakdown Voltage and worse performance at negative polarity.

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