| 侧针对改善特高压交流输电线路雷电屏蔽的实验观测 |
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| 引用本文： | 钱冠军,陈维江,陈家宏,谷山强,贺恒鑫,向念文,谢施君.侧针对改善特高压交流输电线路雷电屏蔽的实验观测[J].高电压技术,2010,36(1):103-108. |
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| 作者姓名： | 钱冠军 陈维江 陈家宏 谷山强 贺恒鑫 向念文 谢施君 |
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| 作者单位： | 1. 国网电力科学研究院,武汉,430074
2. 国家电网公司,北京,100031 |
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| 基金项目： | 国家自然科学基金(50737003)~~ |
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| 摘 要： | 为探讨避雷线加装水平侧针对改善特高压交流输电线路雷电屏蔽性能的机理,开展了1:10和1:20特高压交流线路缩比模型下雷电屏蔽模拟实验及其放电观测,对实验结果进行了分析,并重点结合放电物理过程探讨了放电击中点的选择性和侧针屏蔽增效的机理。研究发现:下行先导初期发展过程中随机取向与各目的物迎面放电的竞争过程都与放电击中点的选择密切相关,下行放电与迎面放电也是相互作用与影响的;在各种间隙结构下,侧针的长度在大于对应间隙的临界电晕半径时才能起到明显的屏蔽增效作用。
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| 关 键 词： | 特高压交流 输电线路 雷电屏蔽 模拟实验 迎面放电 临界电晕半径 |
Discharge Observation of Simulation Experiment on Increasing Lightning Shielding Efficiency of UHVAC Transmission Lines with Side Rod |
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| QIAN Guan-jun
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CHEN Wei-jiang
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CHEN Jia-hong
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GU Shan-qiang
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HE Heng-xin
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XIANG Nian-wen
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XIE Shi-jun.Discharge Observation of Simulation Experiment on Increasing Lightning Shielding Efficiency of UHVAC Transmission Lines with Side Rod[J].High Voltage Engineering,2010,36(1):103-108. |
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| Authors: | QIAN Guan-jun CHEN Wei-jiang CHEN Jia-hong GU Shan-qiang HE Heng-xin XIANG Nian-wen XIE Shi-jun |
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| Affiliation: | 1.State Grid Electric Power Research Institute;Wuhan 430074;China;2.State Grid Corporation of China;Beijing 100031;China |
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| Abstract: | Lightning shielding failure is one of the biggest problems for UHV transmission lines to be solved.We discussed the important technology of increasing the lightning shielding efficiency of UHV transmission lines.To study this technology,a large amount of scaled simulation experiments were conducted,where the ground wire was installed with a horizontal short needle so as to increase the ground wire's lightning shielding efficiency.A high-speed video camera was used to observe the discharging process,and with... |
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| Keywords: | UHVAC transmission lines lightning shielding simulation experiment upward discharge the critical corona radius |
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