| 基于随机理论的特高压输电线路雷电屏蔽模型(英文) |
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| 引用本文： | 伏进,杨庆,司马文霞.基于随机理论的特高压输电线路雷电屏蔽模型(英文)[J].高电压技术,2008,34(12):2542-2546. |
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| 作者姓名： | 伏进 杨庆 司马文霞 |
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| 作者单位： | State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University;Chongqing Yangjiaping Power Bureau |
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| 基金项目： | Project Supported by National Natural Science Foundation of China(50707036);Key Project of the National Eleventh-five Year Research Programof China(2006BAA02A18) |
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| 摘 要： | The operation data obtained abroad indicates that shielding failure in UHV transmission lines mostly accounts for the tripping-out accidents introduced by lightning striking the transmission line.Based on the discharge theories of long air gap and randomness theory,a leader progression model of lightning shielding failure is presented in this paper.The random characteristics of the downward and upward leader are simulated in this model.The ground slope angel is also considered in this model by using coordinate transformation.Moreover,the system voltage is also taken into consideration in this model.The simulation results show that the good agreement between this model and the field data.And the results suggest that return striking exist obviously in UHV transmission line.
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| 关 键 词： | transmission line lightning shielding leader progression randomness UHV tripping-out |
Modeling of Lightning Shielding Failure in UHV Transmission Line Based on Randomness Theory |
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| Affiliation: | FU Jin1,2,YANG Qing1,SIMA Wen-xia1,LI Jian-biao1,XIE Bo1(1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400044,China;2.Chongqing Yangjiaping Power Bureau,Chongqing 400051,China) |
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| Abstract: | The operation data obtained abroad indicates that shielding failure in UHV transmission lines mostly accounts for the tripping-out accidents introduced by lightning striking the transmission line. Based on the discharge theories of long air gap and randomness theory, a leader progression model of lightning shielding failure is presented in this paper. The random characteristics of the downward and upward leader are simulated in this model. The ground slope angel is also considered in this model by using coordinate transformation. Moreover, the system voltage is also taken into consideration in this model. The simulation results show that the good agreement between this model and the field data. And the results suggest that return striking exist obviously in UHV transmission line. |
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| Keywords: | transmission line lightning shielding leader progression randomness UHV tripping-out |
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