Streamer Propagation along the Insulator with the Different Curved Profiles of the Shed.

Xiaobo Meng,Xingming Bian,Bin Cao,Liming Wang,Hongwei Mei

doi:10.3390/polym14050897

Abstract

The flashover along the insulator endangers the reliable operation of the electrical power system. The reasonable curved profiles of the shed could improve the flashover voltage, which would reduce power system outages. The research on the influence of the curved profiles of the shed on the streamer propagation along the insulator made of polymer was presented in the paper. The streamer propagation “stability” field, path, and velocity affected by the curved profiles of the shed, were measured by ultraviolet camera, ICCD camera, and photomultipliers. The “surface” component of the streamer is stopped at the shed with the different curved profiles, while the “air” component could go round the shed and reach the cathode. The streamer propagation “stability” fields are inversely proportional to the curved profiles of the shed. The streamer propagation velocities are proportional to the curved profiles of the shed. The relationship between the streamer propagation and the flashover propagation was discussed in depth. The subsequent flashover propagation is greatly affected by the streamer propagation path and “stability” field. Furthermore, the influence of the material properties on the streamer propagation path was also discussed in depth.

Highlights

The flashover along the insulator surface causes many widespread power outages every year
The perspective of restraining the streamer discharge to prevent the flashover discharge would be a new idea to design the curved profiles of the shed
“surface” component of streamer discharge was blocked at the shed

Summary

Introduction

The flashover along the insulator surface causes many widespread power outages every year. It endangers the stability and safety of electrical power system, resulting in a large number of social and economic losses. The test results of the flashover along the insulator with the different shed configurations have been used to optimize the design of the insulator by many researchers at home and abroad [1,2,3,4]. The inhibited streamer discharge along the insulator can lead to the subsequent flashover process to disappear. The research on the streamer discharge along the insulator with the different sheds is helpful for designing the shed configuration of insulator

Results

Discussion

Conclusion