Current-voltage characteristics of dc corona discharges in air between coaxial cylinders

Journal Article · Sun Feb 15 04:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4907234· OSTI ID:22408141

Zheng, Yuesheng ^[1]; Zhang, Bo; He, Jinliang ^[2]

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1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, Fujian Province (China)
2. Department of Electrical Engineering, Tsinghua University, Beijing 100084 (China)

This paper presents the experimental measurement and numerical analysis of the current-voltage characteristics of dc corona discharges in air between coaxial cylinders. The current-voltage characteristics for both positive and negative corona discharges were measured within a specially designed corona cage. Then the measured results were fitted by different empirical formulae and analyzed by the fluid model. The current-voltage characteristics between coaxial cylinders can be expressed as I = C(U − U{sub 0}){sup m}, where m is within the range 1.5–2.0, which is similar to the point-plane electrode system. The ionization region has no significant effect on the current-voltage characteristic under a low corona current, while it will affect the distribution for the negative corona under a high corona current. The surface onset fields and ion mobilities were emphatically discussed.

• OSTI ID: 22408141
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AIR
CORONA DISCHARGES
CYLINDERS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRODES
ION MOBILITY
NUMERICAL ANALYSIS