Research on influence factors of corona onset characteristics of AC grading rings based on three‐dimensional calculation physical model

IET Generation, Transmission & Distribution

Jian Tang¹  Yongshuang Li¹  Chen Liu¹  Yunpeng Liu²  Shilong Huang²  Wangling He²  Xiaoliang Yan²  Guangzhou Zhang³ 

[1] Department of Power Grid Electric Power Planning & Engineering Institute Co., Ltd Beijing China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power University Baoding China;Wuhan Nanrui Co., Ltd State Grid Electric Power Research Institute Wuhan China;

关键词: Plasma transport properties;    Plasma simulation;    Glow and corona discharges;   

DOI  :  10.1049/gtd2.12233

来源: DOAJ

【 摘 要 】

Abstract In order to obtain the influence laws and mechanisms of size parameters (ring diameter and pipe diameter) of the grading ring and environmental parameters (atmospheric pressure, temperature, and humidity) on corona onset characteristics of a grading ring, a three‐dimensional (3‐D) calculation physical model of corona onset considering the influence of size parameters of the grading ring and environmental parameters is established by proposing an area factor of a photon absorption function suitable for the grading ring. Combined with the thickness of ionised layer and the effective ionisation coefficient, the influence mechanisms of size parameters of the grading ring and environmental parameters on corona onset characteristics are given. The calculation results show that with the increase of the pipe diameter and ring diameter, the corona onset voltage increases gradually and the corona onset field intensity decreases gradually. The increase of the effective ionisation coefficient leads to the expansion of ionisation region, which leads to the decrease of corona onset voltage with the decrease of atmospheric pressure and the increase of temperature. The enhancement of capacity for collisional ionisation in the region with the high field intensity leads to the decrease of corona onset voltage with the increase of humidity.

【 授权许可】

Unknown