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

Author

Kurrer, R. ; Feser, K.

Author_Institution

Inst. Power Transmission & High Voltage Technol., Stuttgart Univ., Germany

Volume

13

Issue

3

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

777

Lastpage

782

Abstract

This paper deals with the application of the ultra high-frequency method (UHF-method) for the detection of partial discharges (PD) in gas-insulated substations (GIS). First, a review of the GIS-relevant part of the theory of electromagnetic wave propagation in the UHF-range (300 MHz-3 GHz) is given. New information considering the attenuation due to reflections of UHF signals at spacers is presented. For the sensors used to pick up the UHF signals inside the GIS, a new description of an antenna valid in the UHF range is introduced. The second part of this paper presents measurements with the UHF method to compare the sensitivity to the conventional PD detection method according to IEC-270. Practical conclusions are drawn from these new results for the application of the UHF method for onsite testing and online PD monitoring of GIS

Keywords

SF₆ insulation; gas insulated substations; insulation testing; monitoring; partial discharges; 300 MHz to 3 GHz; GIS; IEC-270; PD detection; SF₆; UHF partial discharge measurements; UHF signals; attenuation; electromagnetic wave propagation; gas-insulated substations; insulation breakdown testing; online PD monitoring; onsite testing; reflections; Antenna measurements; Antennas and propagation; Attenuation; Electromagnetic propagation; Electromagnetic reflection; Geographic Information Systems; Partial discharges; Sensor phenomena and characterization; Substations; UHF antennas;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.686974

Filename

686974