| VFTO下SF_6间隙及绝缘子沿面预放电电流特性 |
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| 引用本文： | 牟京卫,K.Y,Park,J,K.Chong.VFTO下SF_6间隙及绝缘子沿面预放电电流特性[J].高压电器,2000,36(4):3-7. |
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| 作者姓名： | 牟京卫 K.Y Park J K.Chong |
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| 作者单位： | 1. 西安高压电器研究所,西安,710077
2. 韩国电气研究所 |
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| 基金项目： | 国家自然科学基金资助项目! (5 980 70 0 6 ) |
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| 摘 要： | 对SF6气体间隙及绝缘子沿面的预放电电流进行了测量。测量结果证实 ,正极性VFTO作用下SF6的击穿遵从先导击穿机理 ;而负极性VFTO作用下SF6的击穿一般遵从茎先导机理或流注放电导致直接击穿。气压大小直接影响先导的起始电压及先导的间隔时间。存在绝缘子时 ,先导形成时间间隔及步长变短 ,且在快速振荡冲击电压作用下会出现“逆放电”现象 ,这有利于先导形成 ,从而降低了闪络电压。
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| 关 键 词： | 预放电 快速暂态过电压 先导 流注 |
| 修稿时间： | 2000-03-21 |
Numerical Simulation of Current Interruption of SF_6 Circuit Breaker |
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| Mou Jingwei,K.Y.Park,J.K.Chong.Numerical Simulation of Current Interruption of SF_6 Circuit Breaker[J].High Voltage Apparatus,2000,36(4):3-7. |
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| Authors: | Mou Jingwei KYPark JKChong |
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| Abstract: | An arc model based on the N S equations modified by adding an energy source term to take account of the arc is developed and solved using Taylor galerkin FEM in the present paper. The numerical method is applied to the simulation of the breaking process of a puffer type GCB. Moving boundary conditions of the arc chamber during operation is taken into account. Numerical predictions of the temperature profiles and pressure distribution at different strokes as well as the arc voltage are presented. The numerical results agree well with the experiment. |
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| Keywords: | numerical simulation FEM SF 6 circuit breaker |
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