Control of corona characteristics with third electrode and bias voltage

Author

Moon, Jae-Duk ; Chung, Suk-Hwan ; Lee, Kun-Taek

Author_Institution

Dept. of Electr. Eng., Kyungpook Nat. Univ., Taegu, South Korea

Volume

1

Issue

4

fYear

1994

fDate

8/1/1994 12:00:00 AM

Firstpage

569

Lastpage

577

Abstract

A novel corona control system consisting of a point-to-plate air gap with a cylindrical third electrode has been proposed. Negative and positive coronas from a point-to-plate air gap with a cylindrical third electrode set up close to the corona point of the needle have been investigated with emphasis on the role of the cylindrical third electrode, the bias voltage amplitude and polarity. It was found that the point-to-plate air gap with the cylindrical third electrode had a negative resistance characteristic on its I-V characteristic for negative polarity discharge, which is very different from the same electrode system without the third electrode. Discharge characteristics of the needle point, such as the corona onset voltage and the corona activity, could be controlled by adjusting the field intensity of the corona point by changing the corona point height from the third electrode and varying the bias voltage amplitude and polarity of the third electrode

Keywords

corona; electrodes; negative resistance; spark gaps; I-V characteristic; bias voltage; corona activity; corona characteristics; corona onset voltage; corona point height; cylindrical third electrode; field intensity; negative coronas; negative resistance characteristic; point-to-plate air gap; positive coronas; Air gaps; Control systems; Corona; Electrodes; Fault location; Humidity; Moon; Needles; Temperature; Voltage control;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.311699

Filename

311699