| 摘要: |
| 针对目前普遍使用的电弧模型无法完整地模拟电弧单次放电的全程，进而影响到特快速的暂态过电压(Very Fast Transient Overvoltage，VFTO)的计算与仿真的情况，提出了一种单次电弧击穿模型；同时联合重燃理论设计了一种电弧重燃模型；电弧单次放电全过程分为即将击穿、稳定燃烧与熄弧3个过程，该单次电弧击穿模型综合考虑了这3个过程，在每一过程分别构建相应模型模拟相对应的电弧状态，各个状态的过渡通过追踪电弧电流来完成；同时电弧重燃模型可以准确地模拟电弧的实际状态；通过仿真，验证了该模型的实用性，且可以发现在重燃模型下的VFTO的波形显著差异于单次电弧击穿模型下的情况。 |
| 关键词: 特快速暂态过电压 电弧模型 重燃 |
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| Research on the Influence of Arc Reburning on VFTO in GIS Substation |
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HU Rui,OU Mei-ying，ZHU Jinzhi1,2
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1.School of Mechanical and Electrical Engineering, Chuzhou University，Anhui Chuzhou 239000，China;2.Chuzhou Modern Mould Co., Ltd，Anhui Chuzhou 239000，China
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| Abstract: |
| In view of the fact that the commonly used arc model cannot simulate the entire process of a single arc discharge, which affects the calculation and simulation of very fast transient overvoltage (VFTO), a single arc breakdown model is proposed. Arc reignition is a practical case that must be considered in the study of arc, so a new arc reignition model is designed based on the joint arc reignition criterion based on the single arc breakdown model. The whole process of a single arc discharge consists of three stages: pre breakdown, steady state combustion and arc extinguishing. The single arc breakdown model comprehensively considers the three stages, and the corresponding models to simulate the corresponding arc states are built in each stage. The transition of the three stages is completed by tracking the arc current. At present, the arc model only considers a single breakdown, but ignores the influence of reignition, so the arc process cannot be accurately simulated. The arc reignition model can accurately simulate the actual state of the arc. The applicability of single arc breakdown model is verified by simulation, and it can be found that the waveform of VFTO in the arc reburning model is significantly different from that in the single arc breakdown model. |
| Key words: VFTO arc model reignition |
