| PTFE蒸气对电弧特性影响的数值分析 |
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| 引用本文： | 张俊民,徐国政,王其平.PTFE蒸气对电弧特性影响的数值分析[J].高压电器,2002,38(4):12-15. |
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| 作者姓名： | 张俊民 徐国政 王其平 |
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| 作者单位： | 1. 清华大学,北京,100084
2. 西安交通大学,陕西,西安,710049 |
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| 摘 要： | 在喷口电弧动态数学模型中 ,考虑了喷口烧蚀产生的PTFE蒸气的作用。应用有限元方法模拟了SF6 自能膨胀式断路器开断短路电流的过程。通过与不考虑PTFE蒸气影响的开断过程的模拟结果相比较 ,得到了PTFE蒸气对喷口电弧特性影响的结果。表明 :PTFE蒸气使喷口电弧的压力明显增高 ;使电流较高时的电弧温度降低 ;使电弧电流过零时的弧区温度升高 ;在电弧电流下降时 ,电弧的温度下降速度变慢 ;使电弧的半径增大。
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| 关 键 词： | 聚四氟乙烯蒸气 SF6自能膨胀式断路器 电弧特性 数值分析 |
| 文章编号： | 1001-1609(2002)04-0012-04 |
| 修稿时间： | 2002年2月27日 |
NUMERICAL ANALYSIS OF THE INFLUENCE OF PTFE VAPOUR ON THE CHARACTERISTICS OF NOZZLE ARC |
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| ZHANG Jun min ,?XU Guo zheng ,?WANG Qi ping.NUMERICAL ANALYSIS OF THE INFLUENCE OF PTFE VAPOUR ON THE CHARACTERISTICS OF NOZZLE ARC[J].High Voltage Apparatus,2002,38(4):12-15. |
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| Authors: | ZHANG Jun min ?XU Guo zheng ?WANG Qi ping |
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| Affiliation: | ZHANG Jun min 1,?XU Guo zheng 1,?WANG Qi ping 2 |
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| Abstract: | The influence of PTFE vapour on the characteristics of nozzle arc is considered in the mathematical model of nozzle arc in this paper.The interruption of heavy short circuit current is simulated numerically by the finite element method in an SF 6 auto expansion circuit breaker. As compared with the interruption when PTFE vapour is ignored,the influence of PTFE vapour on the characteristics of nozzle arc is obtained.The results show that the PTFE vapour enhances the pressure of nozzle arc obviously, and reduces the temperature of arc during high current, increases the one during current zero,declines the one slower during arc current decreasing and increases the radius of arc, too. |
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| Keywords: | PTFE vapour SF 6auto expansion circuit breaker ?characteristics of arc ?numerical analysis |
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