Researches on Flow Field's Dynamic Features of Vacuum Switching Arc Based on Optical Flow Field

DOI

10.2991/ecae-17.2018.20How to use a DOI?

Keywords

vacuum arc; arc flow field; optical flow field; eddy current

Abstract

As a kind of fluid, the motion of vacuum arc is complicated and various. Its structure and distribution have a significant effect on vacuum interrupters' comprehensive properties. A method to analyze of arc flow field's dynamic feature based on optical flow is proposed aiming at complicated flow field of vacuum switch arc's sequence images. In this paper optical flow field's basic principle is firstly introduced, and then the noise filtering method to process arc images in different stages is used. Finally, the method of optical flow field estimation to obtain pictures of arc flow field's motion vector feature in the vacuum gap is adopted. According to the results we can find that in the stage of arc striking, the pressure of metal vapor in the vacuum gap is low, accompanied by an expansion of arc and the formation of several parts of eddy current zones. When the arc is going to be extinguished, with the decreasing of the temperature of vacuum arc column center, the arc plasma converges upon its column center instead of expanding, and the parts of eddy current zone shrinks and disappears. At the same time we can see that the method of optical flow field can obtain vacuum arc optical flow field's dynamic feature effectively to describe arc particle moving direction and size. Target images can also be divided easily, real-timely, and accurately, which provides a new technical mean to analyze the dynamic feature of vacuum arc flow field.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Huajun Dong
AU  - Chunxiao Li
AU  - Yingjie Guo
AU  - Jie Li
PY  - 2017/12
DA  - 2017/12
TI  - Researches on Flow Field's Dynamic Features of Vacuum Switching Arc Based on Optical Flow Field
BT  - Proceedings of the 2017 2nd International Conference on Electrical, Control and Automation Engineering (ECAE 2017)
PB  - Atlantis Press
SP  - 92
EP  - 95
SN  - 2352-5401
UR  - https://doi.org/10.2991/ecae-17.2018.20
DO  - 10.2991/ecae-17.2018.20
ID  - Dong2017/12
ER  -