...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric power systems research >Protection scheme for turn-to-turn faults of magnetically controlled shunt reactor based on waveform similarity comparison
【24h】

Protection scheme for turn-to-turn faults of magnetically controlled shunt reactor based on waveform similarity comparison

机译：基于波形相似度比较的磁控并联电抗器匝间故障保护方案

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

Magnetically controlled shunt reactor (MCSR) is one of the key elements applied in EHV/UHV transmission systems for reactive power compensation and overvoltage suppression. Due to its complex core structure and winding connection mode, the accurate identification of turn-to-turn faults in MCSRs becomes challenging. In addition, the existing protection scheme of MCSR is liable to mal-operate under energization due to the similar features of internal fault. In order to solve this problem, a novel protection scheme is proposed by analyzing the waveform similarity and frequency spectrum of three-phase control winding currents. The waveform similarity is measured by the Euclidean distance (ED) between any two of three-phase control winding currents after phase shift. The EDs approach to zero under normal operation but increase under internal faults or pre-excited energization. Internal faults can be further distinguished from the pre-excited energization according to frequency spectrum differences of control winding currents. Finally, simulations in MATLAB/Simulink verify the proposed algorithm, which helps to promote the application of MCSRs in engineering.
机译：磁控并联电抗器（MCSR）是EHV / UHV输电系统中用于无功补偿和过压抑制的关键元件之一。由于其复杂的铁心结构和绕组连接方式，因此准确识别MCSR中的匝间故障变得非常困难。另外，由于内部故障的相似特征，现有的MCSR保护方案在通电时容易误操作。为了解决这个问题，通过分析三相控制绕组电流的波形相似性和频谱特性，提出了一种新颖的保护方案。波形相似性是通过相移后的三相控制绕组电流中的任意两个之间的欧几里德距离（ED）来衡量的。在正常操作下，EDs趋近于零，但在内部故障或预激励时会增加。根据控制绕组电流的频谱差异，可以将内部故障与预励磁进一步区分开。最后，在MATLAB / Simulink中的仿真验证了所提出的算法，这有助于促进MCSR在工程中的应用。

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