【作者】 史仰伟；

【导师】 王泽忠；

【作者基本信息】 华北电力大学（北京） ， 电磁场与微波技术， 2010， 硕士

【摘要】 变电站内存在复杂的瞬态电磁干扰,其脉冲上升沿可达数纳秒,频带跨越数百MHz,掌握变电站瞬态干扰源分布及幅值的数值特征具有重要意义。本文基于法拉第电磁感应定律,应用微小电流互感器及光纤传输技术,研制了一套宽频带、高幅值、ns级响应的脉冲磁场测量系统。论文提出了应用电流互感器测量闭合线圈感应电流以间接测量磁场强度的设计思想,制作出了新型的磁场探头。介绍了测量系统的设计原理及各部分的组成,重点研究了磁场探头的变换机理,幅频特性、灵敏度响应等动态特征及几何结构对探头性能的影响作用,并通过实验进行验证。经过电磁脉冲发生器的测试,此测量系统的灵敏度为160V／T,频带为15k-200MHz,可以满足变电站瞬态电磁场测量的要求。更多还原

【Abstract】 There is complicated transient electromagnetic interference in substation, whose pulse can rise along in ns, its frequency band is in the rang of hundreds of MHz.it is important to understand the distribution of substation transient disturbance and the amplitude of the numerical characteristics. The paper based on Faraday law on electromagnetic induction, with small and optical fiber transmission technology, developed a set of broad-spectral-bandwidth, amplitude, magnetic pulse measurement system responsing in ns;And putted forward the application of CT measurement with indirect closed coil induced current measurement of the magnetic field strength design, researched and developed a new magnetic detector. And introduced the design principle of the measurement system and components, focused on the mechanism of magnetic field of the transformation, amplitude frequency characteristics, dynamic response sensitivity, as well as geometric structure to probe the influence, and verified by experiments. By electromagnetic pulse generator, the measurement system of testing sensitivity for 160V/T, band for 15k-200MHz, which can meet the substation transient field measurement requirements.更多还原