Surface Discharge Characteristics on The Acrylic Surface Around The Edge of Circular Plane-Plane Electrodes

2019 ◽  
Author(s):  
Rian Nurdiansyah ◽  
Umar Khayam
Keyword(s):  
Surface Discharge ◽  
Discharge Characteristics ◽  
Circular Plane

Discharge and Flashover Behavior in Oil-Paper

2020 ◽  
pp. 105-128
Keyword(s):  
Electric Field ◽  
Operating Conditions ◽  
Surface Discharge ◽  
Discharge Characteristics ◽  
Dc Voltage ◽  
Composite Field ◽  
Field Distortion ◽  
Lightning Impulse ◽  
Creeping Discharge ◽  
Paper Insulation

Due to special operating conditions, the valve side bushing of the converter transformer connected to the converter valve is subject to complex voltage excitation, including DC voltage, AC/DC composite voltage, lightning impulse overvoltage, or composite voltage of operating overvoltage and DC. Under the action of this complicated electric field, the oil-paper insulation of the valve-side bushing of the converter transformer is prone to electric field distortion due to charge accumulation, which causes a surface discharge, which will seriously cause the edge breakdown. At the same time, since the temperature in the converter transformer rises due to a large amount of loss during the operation of the transformer, creeping discharge is more likely to occur under the electrothermal composite field. Hence, it is significant to carry out research on the surface discharge characteristics of the oil-paper insulation on the valve side of the converter transformer under the electrothermal composite field.

scholarly journals Surface discharge characteristics and initiation mechanism of PEEK in nitrogen under semi-square voltage

AIP Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 075322 ◽  
Author(s):  
Pengyu Fu ◽  
Zhibin Zhao ◽  
Xuebao Li ◽  
Xiang Cui ◽  
Teng Wen ◽  
...  
Keyword(s):  
Surface Discharge ◽  
Initiation Mechanism ◽  
Discharge Characteristics

scholarly journals The Correlation between Surface Tracking and Partial Discharge Characteristics on Pressboard Surface Immersed in MIDEL eN

2017 ◽  
Vol 7 (2) ◽  
pp. 631 ◽  
Author(s):  
Nur Amirah Othman ◽  
Hidayat Zainuddin ◽  
Aminuddin Aman ◽  
Sharin Abd Ghani ◽  
Imran Sutan Chairul
Keyword(s):  
Surface Layer ◽  
Monitoring System ◽  
Condition Monitoring ◽  
Partial Discharge ◽  
Experimental Results ◽  
Surface Discharge ◽  
Discharge Characteristics ◽  
Surface Tracking ◽  
Tracking Process ◽  
Condition Monitoring System

This paper presents the investigation of the surface tracking on pressboard surface immersed in MIDEL eN oil.  In this work, the development of surface discharge was analyzed by correlating the visual records of surface tracking on impregnated pressboard and the partial discharge (PD) activities.  The PD activities during the surface tracking process were analyzed in terms of Phase Resolved Partial Discharge (PRPD) patterns.  Throughout the experiment, surface discharge is found as the development of tree-like patterns in the form of white marks occurring on the oil-pressboard interface.  This phenomenon is generally accepted as the drying out process that involves evaporation and decomposition of the oil molecules in the pressboard pores due to the surface discharge activities on the pressboard surface layer.  The development of surface discharge on the pressboard surface can continue from minutes to months or even years until failure.  Thus, condition monitoring system is important to characterize this type of faulty condition.  The experimental results show that there is the decreasing trend of PD magnitude during the development of white mark hallway of a gap distance which is eventually suffered from an unexpected fault.

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