Digital monitoring of partial discharges in high voltage cables and switchgear

1996 ◽  
Author(s):  
M. Domum
Keyword(s):  
High Voltage ◽  
Partial Discharges ◽  
Digital Monitoring

scholarly journals Device for online monitoring of insulation faults in high-voltage switchgears

2021 ◽  
Vol 17 (2) ◽  
pp. 155014772199928
Author(s):  
Jiajia Song ◽  
Jinbo Zhang ◽  
Xinnan Fan
Keyword(s):  
Fourier Transform ◽  
High Voltage ◽  
Online Monitoring ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Method ◽  
Capacitive Sensor ◽  
Accurate Diagnosis ◽  
Partial Discharges ◽  
Urgent Problem

Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in the power supervision industry. In this study, a device was proposed for online monitoring of high-voltage switchgears based on pulse current method and ozone (O3) detection. The pulse current method obtains the PD signal by monitoring the phase holes on the switch indicator. Occurrence of a partial discharge in a certain phase leads to the production of a discharge pulse, which can be coupled out by a capacitive sensor. The current spectrum and the O3 produced by partial discharge were processed via fast Fourier transform for accurate diagnosis of the occurrence of partial discharge and its severity in switchgears. The proposed method allows for convenient acquisition of the partial discharge signal, simple installation of the device, and realization with inexpensive sensors.

scholarly journals Investigation of Partial Discharges at the High Voltage Electric Motor Bars

2016 ◽  
Vol 22 (2) ◽  
Author(s):  
Gediminas Dauksys ◽  
Audrius Jonaitis ◽  
Saulius Gudzius ◽  
Alfonsas Morkvenas
Keyword(s):  
High Voltage ◽  
Electric Motor ◽  
Partial Discharges

Inductive ultra-wide band detection and location of partial discharges in high-voltage cables

2007 ◽  
Vol 4 (3) ◽  
pp. 223-229 ◽  
Author(s):  
P. A. A. F. Wouters ◽  
P. C. T. Van Der Laan ◽  
E. F. Steennis
Keyword(s):  
High Voltage ◽  
Wide Band ◽  
Partial Discharges ◽  
Ultra Wide Band

Understanding partial discharges in low-power relay and silicone cable modified to suit high-voltage requirement of deep sea electrical system

2018 ◽  
Vol 28 (6) ◽  
pp. e2542 ◽  
Author(s):  
Saravanakumar Arumugam ◽  
Yvonne Haba ◽  
Gerhard Koerner ◽  
Dirk Uhrlandt ◽  
Mathias Paschen
Keyword(s):  
Low Power ◽  
High Voltage ◽  
Deep Sea ◽  
Partial Discharges ◽  
Electrical System
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