Design of the corona current measurement sensor with wide bandwidth under dc ultra-high-voltage environment

The research in the field of corona discharge, which is one of the key technologies, can help us to realize ultra-high-voltage (UHV) power transmission. This paper proposes a new sampling resistance sensor to measure the dc UHV corona current in a wide band. By designing the structural and distributed parameters of the sensor, the UHV dielectric breakdown performance and the wide-band measuring characteristics of the sensor are satisfied. A high-voltage discharge test shows that the designed sensor can work under a 1200 kV dc environment without the occurrence of corona discharge. A frequency characteristic test shows that the measuring bandwidth of the sensor can be improved from the current 4.5 to 20 MHz. The test results in an actual dc UHV transmission line demonstrate that the sensor can accurately measure the corona current under the dc UHV environment.

[1]  P. Wang,et al.  The Measurement Method for Corona Discharge Current Under High-Voltage Environment , 2008, IEEE Transactions on Instrumentation and Measurement.

[2]  Qifa Wan,et al.  UHV AC corona loss measurement and analysis under rain , 2009, 2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials.

[3]  K. Yatsuzuka,et al.  DC corona discharge of metal filament particle within parallel plate electrodes , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).