...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric Power Systems Research >The Johannesburg Lightning Research Laboratory, part 2: Continuing current charge transfer estimates of downward lightning in South Africa
【24h】

The Johannesburg Lightning Research Laboratory, part 2: Continuing current charge transfer estimates of downward lightning in South Africa

机译：The Johannesburg Lightning Research Laboratory, part 2: Continuing current charge transfer estimates of downward lightning in South Africa

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

摘要

The objective of this study is to determine the quantity of charge transferred, in Coulombs, during the continuing current phase of natural cloud-to-ground (CG) lightning flashes over an area in Johannesburg, South Africa. Continuing current is responsible for most thermal related lightning damages such as destruction of property, electrical fires and physical human trauma. The mitigation of lightning related risks can be better managed through improved measurement methods of naturally occurring lightning. The application of a point-charge model used to infer charge transfer from changing electric field measurements is detailed. A flatplate antenna with an integrator is set up to record the changing electric fields from lightning flashes. These measurements, along with high-speed video footage to determine continuing current durations, are processed and charge transfer quantities are inferred. From 34 negative lightning strokes with long continuing current (i.e. iota 40 ms), the quantity of charge transfer ranges from 0.3 C to 1415 C and has a mean quantity of 18.3 C. For the E recorded positive strokes, the quantity of charge transfer ranges from 3.7 C to 66.6 C. This is comparable with studies performed in Brazil, but larger than average values obtained in Austria and USA.

著录项

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