...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric power systems research >FDTD simulation of direct lightning strike to a phase conductor: Influence of corona on transient voltages at the tower
【24h】

FDTD simulation of direct lightning strike to a phase conductor: Influence of corona on transient voltages at the tower

机译：FDTD对相导体直接雷击的仿真：电晕对塔架瞬态电压的影响

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

In this paper, a simplified model of corona discharge for the finite-difference time-domain (FDTD) computations has been applied to analysis of transient voltages at the tower of a transmission line caused by direct lightning strikes to an upper phase conductor. In the simulations, three 40-m towers, separated by 300m, with one overhead ground wire and three phase conductors are employed. Corona is assumed to occur only on the upper phase conductor struck by lightning. The progression of corona streamers from the conductor is represented as the radial expansion of cylindrical conducting region around the conductor. The reduction of transient-voltage peak due to corona is not very significant, so that the voltage at the nearest tower exceeds the insulation level of 66/77 kV power line considered in this paper. For a 10-kA peak current, the upper-phase-conductor voltage peaks are reduced by 26% and 21% for a positive stroke with 1-mu s- and 3-mu s-risetime currents, respectively, and those for negative-stroke case are reduced by 18% and 13%, respectively. For a 20-kA peak current, the corresponding upper-phase-voltage peaks are reduced by 32% and 25% for the positive-stroke case, and those for the negative-stroke case are reduced by 22% and 15%. (C) 2015 Elsevier B.V. All rights reserved.
机译：在本文中，用于有限差分时域（FDTD）计算的电晕放电简化模型已应用于分析由直接雷击到上层相导体引起的输电线路铁塔处的瞬态电压。在仿真中，使用了三根40米长的塔，它们之间的距离为300m，其中一根是架空的地线，另一根是三相导体。假定电晕仅发生在被闪电击中的上相导体上。电晕光缆从导体的行进表示为围绕导体的圆柱形导电区域的径向扩展。由于电晕引起的瞬态电压峰值的降低不是很明显，因此最近的塔上的电压超过了本文考虑的66/77 kV电力线的绝缘水平。对于10kA的峰值电流，上升时间为1μs和3μs的正冲程时，正相冲程的上相导体电压峰值分别降低26％和21％；而对于负电流，则上相导体的电压峰值分别降低。中风病例分别减少了18％和13％。对于20 kA的峰值电流，正行程情况下相应的上相电压峰值降低32％和25％，负行程情况下相应的上相电压峰值降低22％和15％。 （C）2015 Elsevier B.V.保留所有权利。

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