• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Recent researches in instrumentation, measurement, circuits and systems >Frequency Spectrum Analysis of Electromagnetic Waves Radiated by Electrical Discharges
【24h】

Frequency Spectrum Analysis of Electromagnetic Waves Radiated by Electrical Discharges

机译：放电电磁波的频谱分析

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 study, we analyzed the frequency spectrum of the electromagnetic waves radiated by an electric discharge as a basic method for developing an on-line diagnostic technique for power equipment installed inside closed-switchboards. In order to simulate local and series discharges caused by an electric field concentration and poor connections, three types of electrode systems were fabricated, consisting of needle and plane electrodes and a series arc generator meeting the specifications of UL 1699. The experiment was carried out in an electromagnetically shielded room, and the measurement system consisted of a PD free transformer, a loop antenna with a frequency bandwidth of 150 [kHz]-30 [MHz], an ultra log antenna with a frequency bandwidth of 30 [MHz]-2 [GHz], and an EMI test receiver with a frequency bandwidth of 3 [Hz]-3 [GHz]. According to the experimental results, the frequency spectra of the electrical discharges were widely distributed across a range of 150 [kHz]-160 [MHz], depending on the defects, while commonly found between 150 [kHz] and 10 [MHz]. Therefore, considering the ambient noise and antenna characteristics, the best frequency bandwidth for a measurement system to monitor abnormal conditions by detecting electromagnetic waves in closed-switchboards is 150 [kHz]-10 [MHz].
机译：在这项研究中，我们分析了由放电辐射产生的电磁波的频谱，这是开发用于安装在封闭配电盘内部的电力设备在线诊断技术的基本方法。为了模拟由电场集中和连接不良引起的局部放电和串联放电，制造了三种类型的电极系统，包括针形电极和平面电极以及符合UL 1699规范的串联电弧发生器。一个电磁屏蔽室，测量系统由无PD变压器，带宽为150 [kHz] -30 [MHz]的环形天线，带宽为30 [MHz] -2 [ GHz]和EMI测试接收器，其带宽为3 [Hz] -3 [GHz]。根据实验结果，取决于缺陷，放电的频谱广泛分布在150 [kHz] -160 [MHz]的范围内，而通常在150 [kHz]和10 [MHz]之间。因此，考虑到环境噪声和天线特性，用于测量系统以通过检测闭合配电盘中的电磁波来监视异常状况的最佳频率带宽为150 [kHz] -10 [MHz]。

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