Diagnostics of surge arresters using high voltage gradient ZnO elements for the 800 kV GIS by UHF partial discharge methods

1999 ◽  
Author(s):  
S. Shirakawa
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Voltage Gradient ◽  
Surge Arresters

Improved zinc oxide surge arresters using high voltage gradient 300 V/mm, 400 V/mm ZnO elements

2000 ◽  
Vol 15 (2) ◽  
pp. 569-574 ◽  
Author(s):  
S. Shirakawa ◽  
S. Yamada ◽  
S. Tanaka ◽  
I. Ejiri ◽  
S. Watahiki ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Voltage ◽  
Voltage Gradient ◽  
Surge Arresters

Application of high voltage gradient zinc oxide elements to SF/sub 6/ gas insulated surge arresters for 22 kV-765 kV power systems

1999 ◽  
Vol 14 (2) ◽  
pp. 419-424 ◽  
Author(s):  
S. Shirakawa ◽  
I. Ejiri ◽  
S. Watahiki ◽  
N. Iimura ◽  
S. Nakano ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Power Systems ◽  
High Voltage ◽  
Voltage Gradient ◽  
Surge Arresters

A High-Voltage High-Speed AC Switch Based on Controlled Vacuum Surge Arresters

2018 ◽  
Vol 4 (4) ◽  
pp. 4-13
Author(s):  
Vladimir A. SIDOROV ◽  
◽  
Gennady D. DOMASHENKO ◽  
Marat R. AKHMETGAREYEV ◽  
Yurii V. SHCHERBAKOV ◽  
...  
Keyword(s):  
High Voltage ◽  
High Speed ◽  
Surge Arresters

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.

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