| 线路避雷器在防雷中的作用研究 |
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| 引用本文： | 郑江,林苗.线路避雷器在防雷中的作用研究[J].电瓷避雷器,2006(6):38-41. |
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| 作者姓名： | 郑江 林苗 |
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| 作者单位： | 广西大学电气工程学院,广西,南宁,530004 |
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| 摘 要： | 为了研究线路避雷器在防雷中的作用,根据雷电直击杆塔顶部及绕击导线两种情况,建立线路避雷器动作时的等值电路,推导出考虑残压影响的线路避雷器对雷电流的分流计算公式。计算结果表明,当雷电直击杆塔顶部致线路避雷器动作时,线路避雷器约可向保护相导线分流≮10%的雷电流;而当雷电绕击导线致线路避雷器动作时,线路避雷器可向杆塔及杆塔两侧相邻档避雷线分流70%的雷电流。
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| 关 键 词： | 线路避雷器 分流雷电流 输电线路 |
| 文章编号： | 1003-8337(2006)06-0038-04 |
| 收稿时间： | 2006-08-18 |
| 修稿时间： | 2006年8月18日 |
Study on Function of Line Surge Arrester at Line Lightning Protection |
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| ZHENG Jiang,LIN Miao.Study on Function of Line Surge Arrester at Line Lightning Protection[J].Insulators and Surge Arresters,2006(6):38-41. |
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| Authors: | ZHENG Jiang LIN Miao |
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| Affiliation: | School of Electrical Engineering, Guangxi University, Nanning 530004, China |
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| Abstract: | In order to study the function of line surge arrester at line lightning protection,equivalent circuit of line surge operation had been built considering conditions of straight lightning strike on tower top and round strike to conductor.The equation for calculation lightning current shunting of line surge arrester was deducted taking consideration of effect of its discharge voltage.The result of calculation shows that the line suge arrester can share ≮10% lightning surge current to shield conductor when it operates due to straight lightning strike on tower top 70% current to tower and to shield conductor of two adjacent tower when the arrester operates due to round strike to conductor. |
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| Keywords: | line surge arrester line surge current sharing transmission line |
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