Capacitive sensor for the measurement of transients in gas-insulated switchgears

Author

Wu, Hao ; Li, Chengrong ; Xu, Hairui ; Ma, Guoming ; Quan, Jiangtao ; Jiang, Jian

Author_Institution

Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Beijing, China

fYear

2009

fDate

18-21 Oct. 2009

Firstpage

290

Lastpage

294

Abstract

A capacitive sensor has been developed for the measurements of very fast transient over-voltages (VFTO) in GIS. Step response measurement was performed on the sensor. It is shown from the test that the settling time is less than 20 ns and the response time is less than 2 ns, suitable to the IEC1321-1. The sensor has been calibrated by power frequency voltage, impulse voltage, the division ratio of the power frequency voltage is almost as the same as that of the impulse voltage, the maximum error was less than 1.3%. The sensor was mounted in a 126 KV GIS test setup to measure the transients produced by the air gap discharges. The measurement results demonstrated that the sensor is able to measure the transients with 10 ns rise-time successfully.

Keywords

air gaps; capacitive sensors; gas insulated switchgear; overvoltage; power system transients; step response; switchgear testing; voltage measurement; GIS; Step response measurement; air gap discharges; capacitive sensor; gas insulated switchgear; impulse voltage; overvoltage transient measurement; power frequency voltage; time 10 ns; voltage 126 kV; Capacitive sensors; Capacitors; Dielectric measurements; Gas insulation; Geographic Information Systems; Impedance measurement; Inductance measurement; Sensor phenomena and characterization; Switchgear; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2009. CEIDP '09. IEEE Conference on

Conference_Location

Virginia Beach, VA

ISSN

0084-9162

Print_ISBN

978-1-4244-4557-8

Electronic_ISBN

0084-9162

Type

conf

DOI

10.1109/CEIDP.2009.5377835

Filename

5377835