• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric Power Components and Systems >Fault Location Using Local Mean Decomposition on Traveling Waves with Three Current Measurements in an Overhead Conductor
【24h】

Fault Location Using Local Mean Decomposition on Traveling Waves with Three Current Measurements in an Overhead Conductor

机译：在架空导线中使用三个电流测量值对行波进行局部均值分解的故障定位

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

A fault-location scheme based on local mean decomposition on traveling waves with three current measurements in an overhead conductor is presented herein. In the fault-location scheme, local mean decomposition is used to detect the arrival time of the initial traveling wave at each measurement. To obtain more accurate wave velocity, a third Rogowski coil current transformer is used to measure the fault current in the midway of a transmission line besides a couple of measurements used by the two-ended traveling-wave method at both its ends. The faulted line section can be identified by comparing the phase angles of the measured current data at its two ends; wave velocity can then be calculated by the ratio of the length of the non-faulted line section to the time that the fault wave travels through this line section. The proposed scheme can reduce the errors of previous methods on wave velocity determination. After wave velocity is determined, the fault distance can be calculated according to the two-ended traveling-wave method. The proposed fault-location scheme is tested by many simulations, and the results demonstrate it has higher accuracy than those using wavelet transform and Hilbert-Huang transform.
机译：本文提出了一种基于架空导体中三个电流测量值的行波局部均值分解的故障定位方案。在故障定位方案中，局部均值分解用于检测每次测量中初始行波的到达时间。为了获得更准确的波速，除了使用两端行波方法在两端进行的两次测量外，第三台Rogowski线圈电流互感器还用于测量传输线中途的故障电流。可以通过比较两端的被测电流数据的相角来识别故障线路部分。然后可以通过无故障线段的长度与故障波通过该线段的时间之比来计算波速。所提出的方案可以减少先前方法在波速确定中的误差。确定波速后，可根据两端行波法计算出故障距离。提出的故障定位方案经过多次仿真测试，结果表明，该方案具有比小波变换和希尔伯特-黄谱变换更高的定位精度。

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