The application of ultra-high-frequency partial discharge measurements to gas-insulated substations

1998 ◽  
Vol 13 (3) ◽  
pp. 777-782 ◽  
Author(s):  
R. Kurrer ◽  
K. Feser
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Ultra High Frequency ◽  
Discharge Measurements

scholarly journals Partial Discharge Measurements in a High Voltage Gas Insulated Transmission Line Insulated with CO2

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2891 ◽  
Author(s):  
Phillip Widger ◽  
Daniel Carr ◽  
Alistair Reid ◽  
Meirion Hills ◽  
Chris Stone ◽  
...  
Keyword(s):  
Transmission Line ◽  
Direct Measurement ◽  
High Voltage ◽  
High Frequency ◽  
Noise Immunity ◽  
Partial Discharge ◽  
Filling Pressure ◽  
Ultra High Frequency ◽  
Capacitive Divider ◽  
Discharge Measurements

This paper uses practical experimentation to analyse the effect of replacing SF6 with pure CO2 in conventional gas insulated transmission line sections by studying partial discharge measurements taken with applied voltages up to 242 kV (rms). The results can also help in understanding the properties of new alternative gas mixtures which can be utilised with a ratio of up to and over 95% CO2. The experiments undertaken involved filling a gas insulated line demonstrator with 3 bars of CO2 and applying voltages up to 242 kV in both clean conditions and particle-contaminated enclosure conditions. The results demonstrate that CO2 can be used to insulate gas equipment without breakdown at high voltage, however, a higher gas-filling pressure may be needed to reduce the partial discharge found in the tests presented in this paper. Another aspect of the work showed that partial discharge (PD) measurements from internal ultra-high frequency (UHF) sensors compared with a direct measurement from a capacitive divider both clearly showed the effect of contaminating particles in CO2. However, the PD divider measurements also showed considerable external PD on the outside of the gas compartment, leading to the conclusion that UHF sensors are still regarded as having the highest sensitivity and noise immunity for gas insulated switchgear (GIS) or gas insulated transmission line (GIL) systems including when the equipment is insulated with CO2.

Present Situation and Prospect of Internal Sensors for UHF Detection in GIS

2015 ◽  
Vol 738-739 ◽  
pp. 38-41
Author(s):  
Yu Bing Duan ◽  
Hao Zhang ◽  
Jun Yong ◽  
Bo Yang ◽  
Xiao Li Hu ◽  
...  
Keyword(s):  
Performance Indicators ◽  
High Frequency ◽  
Partial Discharge ◽  
Present Situation ◽  
Ultra High Frequency ◽  
Gas Insulated Switchgear ◽  
Discharge Detection

This paper summarizes the application situation of the ultra-high frequency (UHF) method in gas insulated switchgear (GIS) partial discharge detection, as well as the differences between internal and external UHF sensors. The performance indicators of internal sensors are introduced, and five main types of internal sensors are discussed and evaluated. In addition, several problems to be solved are posed for researchers.

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