| 高压输电线路绕击跳闸率的研究 |
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| 引用本文： | 樊春雷,吴广宁,李瑞芳,王云飞.高压输电线路绕击跳闸率的研究[J].电瓷避雷器,2009(2). |
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| 作者姓名： | 樊春雷 吴广宁 李瑞芳 王云飞 |
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| 作者单位： | 西南交通大学电气工程学院,成都,610031 |
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| 摘 要： | 基于改进电气几何模型并充分考虑了雷击避雷线与大地的不同,引入击距系数。提出了利用暴露距离计算线路绕击跳闸率,以500 kV输电线路为例,采用该方法计算绕击跳闸率比规程法计算更准确。并且结合实例研究分析了输电线路避雷线保护角和导线高度、地面倾角、线路绝缘强度对绕击跳闸率的影响。结果表明绕击跳闸率与保护角、地面倾角、杆塔高度有关,随着保护角、地面倾角、杆塔高度的增加而增加,当避雷线保护角为-6.24°时,绕击闪络率从0.213 5(100 km·a)-1降到0。
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| 关 键 词： | 输电线路 绕击跳闸率 击距系数 暴露距离 |
Study on Shielding Failure Flashover Rate for High Voltage Transmission Line |
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| FAN Chun-lei,WU Guan-gning,LI Rui-fang,WANG Yun-fei.Study on Shielding Failure Flashover Rate for High Voltage Transmission Line[J].Insulators and Surge Arresters,2009(2). |
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| Authors: | FAN Chun-lei WU Guan-gning LI Rui-fang WANG Yun-fei |
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| Affiliation: | School of Electrical Engineering;Southwest Jiaotong University;Chengdu 610031;China |
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| Abstract: | "The striking distance factor" is introduced based on the improved electric-geometry model and by fully considering difference of electric intensity between lightning stroke on the transmis-sion line and the ground.The " unshielded distance" is put forward to be adopted to calculate line shielding failure flashover rate.Taking 500kV transmission line as example,this method is more accu-rate compared with the regulation method.At the same time,the influence of the shielding angle,the height of tower,the grou... |
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| Keywords: | transmission line shielding failure tripping rate striking distance factor unshielded distance |
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