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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (5): 054014.doi: 10.1088/2058-6272/aaa66b

• THE 8TH INTERNATIONAL CONFERENCE ON APPLIED ELECTROSTATICS • Previous Articles     Next Articles

The detailed characteristics of positive corona current pulses in the line-to-plane electrodes

Xuebao LI (李学宝), Dayong LI (李大勇), Qian ZHANG (张迁), Yinfei LI (李隐飞),  Xiang CUI (崔翔) and Tiebing LU (卢铁兵)   

  

  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, People’s Republic of China
  • Received:2017-10-18 Published:2018-01-08
  • Supported by:

    This work was supported by National Natural Science Foundation of China under Grant No. 51707066 and by the Fundamental Research Funds for the Central Universities under Grant No. 2017 MS004 and No. XCA17003-04.

Abstract:

The corona current pulses generated by corona discharge are the sources of the radio interference from transmission lines and the detailed characteristics of the corona current pulses from conductor should be investigated in order to reveal their generation mechanism. In this paper, the line-to-plane electrodes are designed to measure and analyze the characteristics of corona current pulses from positive corona discharges. The influences of inter-electrode gap and line diameters on the detail characteristics of corona current pulses, such as pulse amplitude, rise time, duration time and repetition frequency, are carefully analyzed. The obtained results show that the pulse amplitude and the repetition frequency increase with the diameter of line electrode when the electric fields on the surface of line electrodes are same. With the increase of inter-electrode gap, the pulse amplitude and the repetition frequency first decrease and then turn to be stable, while the rise time first increases and finally turns to be stable. The distributions of electric field and space charges under the line electrodes are calculated, and the influences of inter-electrode gap and line electrode diameter on the experimental results are qualitatively explained.

Key words: corona current, positive corona discharge, line-to-plane electrodes, space charges