| 山区输电线路电气几何模型计算绕击率探讨 |
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| 引用本文： | 程勇,戴玉松,许安.山区输电线路电气几何模型计算绕击率探讨[J].四川电力技术,2005,28(4):26-28,51. |
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| 作者姓名： | 程勇 戴玉松 许安 |
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| 作者单位： | 1. 西华大学,四川成都,610039
2. 四川电力试验研究院,四川成都,610072 |
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| 摘 要： | 雷击输电线路的EGM理论，是基于垂直向下落雷假设。分析了高山地区500kv线路因地形复杂，同样基于均匀落雷假设，由于雷电先导移动方向不同，导致山区线路雷电绕击率升高、跳闸率增大，上述分析与实际情况相一致。分析并计算了因雷电流的幅值和雷电先导入射角，以及地面倾角变化对绕击率的影响。算例表明了绕击率的变化趋势．并探讨了影响山区输电线路绕击率的不同因素，可为线路设计和运行部门提供依据。
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| 关 键 词： | 雷电倾角 绕击率 电气几何模型 坡度 |
| 文章编号： | 1003-6954（2005）04-0026-03 |
| 收稿时间： | 2005-05-30 |
| 修稿时间： | 2005-05-30 |
Discussion on Calculation of Rates of Shielding Failure for Transmission Lines in Mountainous Area by EGM |
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| Cheng Yong,Dai Yusong,XU An.Discussion on Calculation of Rates of Shielding Failure for Transmission Lines in Mountainous Area by EGM[J].Sichuan Electric Power Technology,2005,28(4):26-28,51. |
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| Authors: | Cheng Yong Dai Yusong XU An |
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| Affiliation: | Cheng Yong Dai Yusong Xu An |
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| Abstract: | The lightning shielding failure of .500kV llne and transmission line models developed by EGM is calculated and analyzed. Because of the angle of lightning incidence, a new method for calculating the shielding failure rate is proposd. The calculated result is compared with the measured results and both results are consistent. And it shows that the shielding failure rate is a function of the angle of lightning incidence, strokes lightning amplitude and ground angle, The EGM is improved by considering the effect of the angle of lightning incidence. It can give reference for the design of transmission line and operation department. |
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| Keywords: | angle of lightning incidence the rates of shielding failure electrogeometric model gradient |
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