...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric power systems research >Effect of high-resistivity ground on the lightning performance of overhead lines
【24h】

Effect of high-resistivity ground on the lightning performance of overhead lines

机译：高电阻率接地对桥接线雷电性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents an approximate formula for the peak-value of the lightning overvoltages induced on aerial lines installed over high resistivity ground, which is valid up to 10 Omega m. The formula is validated by comparing its results with results obtained from more accurate techniques. The formula is then applied in a Monte Carlo code to assess the effect of high-resistivity ground on the lightning performance of distribution lines without grounded neutral conductor. The results show that, for good conducting ground (e.g., 100 Omega m), indirect flashes are relevant for the 100 kV CFO lines, but they are not relevant for the 170 kV CFO lines. For poorly-conducting ground (e.g., 1000 Omega m), indirect flashes are relevant for 170 kV CFO lines, but they are not relevant for the 300 kV CFO lines. Indirect flashes become relevant for the 300 kV CFO lines only for very poor-conducting ground (e.g., above 2000 Omega m). The paper results also show that using a grounded neutral conductor improves significantly the indirect lightning performance of distribution lines.
机译：本文介绍了在安装在高电阻率接地上的空中线上引起的雷电过电压的峰值的近似公式，这是最多可有效的10欧米米。通过将其结果与从更准确的技术获得的结果进行比较来验证该公式。然后将公式应用于蒙特卡罗代码中，以评估高电阻率接地对没有接地中性导体的分配线的闪电性能的影响。结果表明，对于良好的导电地面（例如，100欧米加M），间接闪光与100 kV CFO线相关，但它们与170 kV CFO线无关。对于导通较差的地面（例如，1000欧米加M），间接闪光与170 kV CFO线相关，但它们与300 kV CFO线无关。间接闪光仅对仅用于非常差的地面的300 kV CFO线（例如，2000高于2000 omega m）。纸质结果还表明，使用接地的中性导体可显着提高分配线的间接避雷性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号