| 500kV／22OkV同塔四回线绕击跳闸率的研究 |
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| 引用本文： | 王磊,肖山.500kV／22OkV同塔四回线绕击跳闸率的研究[J].吉林电力,2010,38(1):26-29. |
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| 作者姓名： | 王磊 肖山 |
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| 作者单位： | 1. 东北电力大学,吉林,吉林,132012
2. 吉林省电力有限公司,长春,130021 |
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| 摘 要： | 分析了500kV／220kV同塔四回输电线路的绕击耐雷性能，采用电气几何模型法EGM来计算绕击跳闸率。采用暴露弧法计算每根导线绕击跳闸率，以暴露弧为0时对应的雷电流作为雷电的最大绕击电流，并分析了地面倾角、杆塔结构等因素对500kV／220kV同塔四回输电线路绕击跳闸率的影响。结果表明，雷电绕击多发生在500kV线路上；随着地面倾角增大，绕击跳闸率增大；绕击跳闸率随避雷线横担长度增长而减小，但对220kV线路影响不大。通过详细分析和计算，对塔型设计方案进行了验证、比较。
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| 关 键 词： | 同塔四回线 绕击跳闸率 电气几何模型 地面倾角 击距 |
Research on Shielding Failure Rate of 500 kV/220 kV Quadruple-circuits |
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| WANG Lei,XIAO Shan.Research on Shielding Failure Rate of 500 kV/220 kV Quadruple-circuits[J].Jilin Electric Power,2010,38(1):26-29. |
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| Authors: | WANG Lei XIAO Shan |
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| Abstract: | The performance against lightning strike of 500 kV/220 kV quadruple-circuits on one same tower was analyzed and shielding failure rate has been calculated according to EGM.The shielding failure rate of each wire was calculated according to exposure arc method.The lightening current when exposure arc is zero has been adopted as maximum shielding current.The influences of ground obliquity and pole structures on shielding failure rate in quadruplecircuits on one same tower have been analyzed.It has been conclu... |
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| Keywords: | quadruple-circuits on one same tower shielding failure rate EGM ground obliquity striking distance |
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