A spatiotemporal evolution model of a short-circuit arc to a secondary arc based on the improved charge simulation method
A spatiotemporal evolution model of a short-circuit arc to a secondary arc based on the improved charge simulation method
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DOI：
10.1088/2058-6272/ad0c22
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发表时间：
2023-11
影响因子：
1.7
通讯作者：
Haoxi Cong;Yuxuan Wang;Lipan Qiao;Wenjing Su;Qingmin Li
中科院分区：
文献类型：
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作者：
Haoxi Cong;Yuxuan Wang;Lipan Qiao;Wenjing Su;Qingmin Li
二次电弧的初始形状对其随后的形状有很大影响。为了建立潜供电弧燃弧时间模型，修正单相重合闸顺序，必须对短路电弧向潜供电弧的演变过程进行理论和实验分析。在这项研究中，一个改进的电荷模拟方法被用来开发的内部空间电场模型的短路电弧。电场强度被用作描述潜供电弧初始形状的独立变量。在此基础上建立了潜供电弧演化模型。并通过与物理实验结果的对比，对模型的准确性进行了评价。潜供电弧电流增大时，燃弧时间和离散度增大。存在随着燃弧时间增加而增加电弧长度的总体趋势。然而，由于电弧柱之间的短路，在电弧点火期间存在电弧长度的减小。此外，在0° ~ 90 °范围内，随着风向与x轴夹角的增大，燃弧时间减小。本文研究了短路电弧演变为二次电弧的方法。研究结果可用于建立潜供电弧演变模型，为潜供电弧抑制提供技术和理论依据。
The initial shape of the secondary arc considerably influences its subsequent shape. To establish the model for the arcing time of the secondary arc and modify the single-phase reclosing sequence, theoretical and experimental analysis of the evolution process of the short-circuit arc to the secondary arc is critical. In this study, an improved charge simulation method was used to develop the internal-space electric-field model of the short-circuit arc. The intensity of the electric field was used as an independent variable to describe the initial shape of the secondary arc. A secondary arc evolution model was developed based on this model. Moreover, the accuracy of the model was evaluated by comparison with physical experimental results. When the secondary arc current increased, the arcing time and dispersion increased. There is an overall trend of increasing arc length with increasing arcing time. Nevertheless, there is a reduction in arc length during arc ignition due to short circuits between the arc columns. Furthermore, the arcing time decreased in the range of 0°–90° as the angle between the wind direction and the x-axis increased. This work investigated the method by which short-circuit arcs evolve into secondary arcs. The results can be used to develop the secondary arc evolution model and to provide both a technical and theoretical basis for secondary arc suppression.