Understanding surface charge accumulation and surface flashover on spacers in compressed gas insulation

2018 ◽  
Vol 25 (4) ◽  
pp. 1152-1166 ◽  
Author(s):  
Chuanyang Li ◽  
Chuanjie Lin ◽  
Bo Zhang ◽  
Qi Li ◽  
Weidong Liu ◽  
...  
Keyword(s):  
Surface Charge ◽  
Charge Accumulation ◽  
Surface Flashover ◽  
Compressed Gas ◽  
Gas Insulation

A review on factors that affect surface charge accumulation and charge-induced surface flashover

2021 ◽  
Author(s):  
Mengqiang Yuan ◽  
Liang Zou ◽  
Zongze Li ◽  
Long Pang ◽  
Tong Zhao ◽  
...  
Keyword(s):  
Surface Charge ◽  
Charge Accumulation ◽  
Surface Flashover

Surface modification of silicone rubber by CF4 radio frequency capacitively coupled plasma for improvement of flashover

2021 ◽  
Author(s):  
Chenxu Wang ◽  
Guanjun Zhang ◽  
Bo Zhang ◽  
Yuhao Sun ◽  
Yanan Peng ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Radio Frequency ◽  
Surface Charge ◽  
Silicone Rubber ◽  
Photoelectron Spectroscopy ◽  
Charge Accumulation ◽  
Capacitively Coupled ◽  
Surface Flashover ◽  
Flashover Voltage ◽  
Capacitively Coupled Plasma

Abstract The flashover performance of insulating materials plays an important role in the development of high-voltage insulation systems. In this paper, silicone rubber(SIR) is modified by CF4 radio frequency capacitively coupled plasma(CCP) for the improvement of surface insulation performance. The discharge mode and active particles of CCP are diagnosed by the digital single lens reflex and spectrometer. Scanning electron microscopy and X-ray photoelectron spectroscopy is used for the surface physicochemical properties of samples, while the surface charge dissipation, charge accumulation measurement and flashover test are applied for the surface electrical characteristics. Experimental results show that the fluorocarbon groups can be grafted and the surface roughness increase after plasma treatment. Besides, the surface charge dissipation is decelerated and the positive charge accumulation is obviously inhibited for the treated samples. Furthermore, the surface flashover voltage can be increased by 26.67% after 10-minute treatment. It is considered that strong electron affinity of C-F and increased surface roughness can contribute to deepen surface traps, which not only inhibits the development of secondary electron emission avalanche, but also alleviates the surface charge accumulation and finally improve the surface flashover voltage of SIR.

Free Conducting Particles in Compressed Gas Insulation

1981 ◽  
Vol EI-16 (4) ◽  
pp. 327-338 ◽  
Author(s):  
H. Anis ◽  
K. Srivastava
Keyword(s):  
Compressed Gas ◽  
Gas Insulation
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