Xiangyu Han , Fei Yang , Hongbin Chen , Yikun Wang , Xuliang Zhao , Yili Chen , Chenle Zhai , Jinru Sun , Weiping Guan , Yi Wu , Mingzhe Rong
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引用次数: 0
Abstract
During the current-sharing process of vacuum multi-breakers in parallel, the arc voltage drives the current transfer, which causes current commutation among the branch currents. For this special current variation condition, this paper built an experimental platform, which can effectively simulate a current commutation process of vacuum multi-breakers in parallel. Firstly, the volt-ampere characteristics of the vacuum arc in the process of current commutation were analyzed in detail through the arcing experiments. It was found that there was a hysteresis characteristic in the arc voltage, especially in the decreasing current commutation. Next, the influence of peak current, the moment of current commutation, and the depth of current commutation on the hysteresis characteristic of arc voltage were studied, and it was pointed out that when the current in the current commutation was closer to the current zero region, the hysteresis characteristics of the arc voltage were more significant when the current rose back. Furthermore, the arc morphology of the vacuum arc was simultaneously photographed by a high-speed camera, and the evolution of the arc morphology during the current commutation process was investigated. The microscopic physical mechanism causing the hysteresis characteristics of arc voltage was briefly discussed. Finally, the influence of arc voltage hysteresis characteristic on parallel current-sharing was analyzed, and the future improvement direction was proposed. The research of this paper will lay the foundation for revealing the complex current-sharing mechanism of vacuum multi-breakers in parallel.
期刊介绍：
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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