Discussion on “Effect of discharge products upon corona discharge and spark breakdown voltage” and “Analysis of pre-breakdown current pulses in gas discharge gaps”

1964 ◽  
Vol 111 (6) ◽  
pp. 1159
Keyword(s):  
Corona Discharge ◽  
Breakdown Voltage ◽  
Gas Discharge ◽  
Current Pulses ◽  
Spark Breakdown

scholarly journals Measurements of Corona Discharge in Sharp –to-Plane Electrodes Configuration

2018 ◽  
Vol 11 (3) ◽  
pp. 79-84
Author(s):  
Hassan J. Mohammed
Keyword(s):  
Electric Field ◽  
Corona Discharge ◽  
Breakdown Voltage ◽  
Physical Process ◽  
Applied Voltage ◽  
Threshold Value ◽  
Precise Knowledge ◽  
Dc Current ◽  
High Degree ◽  
Spark Breakdown

A Dc positive sharp- to –plane Corona phenomena  have been studied in electronegative gases (air ,and SF6 ) for pressure up to (3.2bar and gap length from 0.1 to 0.5 cm), with high degree of non-uniformity electric field. The corona –breakdown phases can exhibit anomalous characteristics. The exact physical process of such phenomena is not yet fully understood complete. To better understand this process precise knowledge about corona and spark discharge is necessary. Hence the dependency of corona inception and spark breakdown voltage on the pressure, non-uniformity field factor  and the type of applied voltage ,also the type of materials. The steady  region of corona discharge is observed in the ( sharp- to- plane ), for applied voltage between the threshold value voltage and onset value , we observe an effect that attaching gases. A Townsend type of discharge develops in the region close to point. At voltages above the onset value , the burst pulses are replaced by a Dc current ,and in some cases 'pre-breakdown ' streamer are also observed.

scholarly journals Influence of the sign and magnitude of a surface charge on the breakdown voltage of a barrier corona discharge in Ar

2019 ◽  
Vol 1394 ◽  
pp. 012004
Author(s):  
Yu S Akishev ◽  
A A Balakirev ◽  
M A Medvedev ◽  
A V Petryakov ◽  
N I Trushkin
Keyword(s):  
Surface Charge ◽  
Corona Discharge ◽  
Breakdown Voltage

Partial Discharge Characterization based on Leakage Current Pulses Waveform for Contaminated Glass Insulator String

2016 ◽  
Vol 6 (2) ◽  
pp. 835
Author(s):  
N. A. Othman ◽  
M. A. M. Piah ◽  
Z. Adzis ◽  
Nasir A. Al-geelani
Keyword(s):  
Corona Discharge ◽  
Monitoring System ◽  
Leakage Current ◽  
Partial Discharge ◽  
Surface Discharge ◽  
Performance Tests ◽  
Current Pulses ◽  
Glass Insulator

This paper deals with the analysis of partial discharge (PD) occurrences based on leakage current (LC) pulses distribution under different level of contamination. In this work, laboratory based contamination performance tests are conducted on four units of glass insulator string stacked in I-position. Results show that PD can be characterized (according to their occurrence with respect to the AC supply) as follows: corona discharge occurring dominantly in lightly contaminated insulators, surface discharge occurring dominantly in medium contaminated insulators and finally internal discharge occurring dominantly in heavily contaminated insulators. The ability to distinguish the type of PDs from the LC waveform could be used to monitor and predict the condition of the insulator. The outcome can be incorporated in a conditioning monitoring system.

Spark Breakdown in Gas-Discharge-Tube Surge Arrester at Voltage Pulse

2015 ◽  
Vol 30 (3) ◽  
pp. 1552-1560 ◽  
Author(s):  
M. Bizjak ◽  
M. Bekovic ◽  
A. Hamler
Keyword(s):  
Discharge Tube ◽  
Voltage Pulse ◽  
Gas Discharge ◽  
Spark Breakdown

scholarly journals Partial Discharge Characterization based on Leakage Current Pulses Waveform for Contaminated Glass Insulator String

2016 ◽  
Vol 6 (2) ◽  
pp. 835
Author(s):  
N. A. Othman ◽  
M. A. M. Piah ◽  
Z. Adzis ◽  
Nasir A. Al-geelani
Keyword(s):  
Corona Discharge ◽  
Monitoring System ◽  
Leakage Current ◽  
Partial Discharge ◽  
Surface Discharge ◽  
Performance Tests ◽  
Current Pulses ◽  
Glass Insulator

This paper deals with the analysis of partial discharge (PD) occurrences based on leakage current (LC) pulses distribution under different level of contamination. In this work, laboratory based contamination performance tests are conducted on four units of glass insulator string stacked in I-position. Results show that PD can be characterized (according to their occurrence with respect to the AC supply) as follows: corona discharge occurring dominantly in lightly contaminated insulators, surface discharge occurring dominantly in medium contaminated insulators and finally internal discharge occurring dominantly in heavily contaminated insulators. The ability to distinguish the type of PDs from the LC waveform could be used to monitor and predict the condition of the insulator. The outcome can be incorporated in a conditioning monitoring system.

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