长线缆宽带瞬态脉冲骚扰的传播特性分析  

Propagation Characteristics of Broad Band Transient Pulse disturbance in Long Cables

作　　者：冯德旺[1,2] 

机构地区：[1]福建农林大学计算机与信息学院,福州350002 [2]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《太原理工大学学报》2012年第6期683-687,共5页Journal of Taiyuan University of Technology

基　　金：国家自然基金资助项目(50674093);福建省自然科学基金资助项目(2012J01190)

摘　　要：将电快速瞬变脉冲群(EFT/B)展开为傅里叶正弦级数,解决了色散传输线的激励加载问题。建立双绞线、单导线、双导线和同轴电缆的传输线模型,采用叠加原理分析宽带骚扰的传播特性,结果表明:骚扰电压极性会随着传播距离增大而不断转换,电压峰值在正负极性间呈振荡变化。双绞线和双导线对骚扰的传播具有自然抑制作用,长度为1km时负载端的骚扰电压已衰减为0;同轴电缆在距离较短时骚扰电压峰值最低,距离较长时电压峰值会产生波动,带负载时正反向电压峰值都很大,长距离传输信号易受EFT/B的影响;单导线骚扰电压振荡最明显,且负载开路时会产生叠加效应,电压峰值最大可达激励源电压峰值的2.5倍,对地共模干扰是EFT/B的主要形式。In order to solve the problem of dispersion transmission line power, Fourier sine se ries was used to represent electrical fast transient/burst （EFT/B）. The RLCG models of twisted- pair, single-line, double-line, and coaxial-cable were constructed based on the transmission line theory. Furthermore, with an application of superposition theorem, the propagation characteris tics of broad band disturbance in long cables were analyzed. The results show that the disturb- ance voltage polarity and peak value continually changed with the increase of propagation dis tance. Twisted-pair and double line had natural restrain function for EFT/B disturbance propaga tion in them since their voltages all attenuated to zero in load end of lkm. The disturbance volt age of coaxial-cable was the lowest in short distance, and its peak value fluctuated between posi tive and negative polarity in long distance. So, coaxial-cable was easily influenced by EFT/B. The disturbance voltage of single-line produced smart oscillation with the increase of propagation distance, and occurred 2.5 times as high as EFT/B peak value in open-circuit. Finally, common mode interference was confirmed as the main form of EFT/B.

关 键 词：电快速瞬变脉冲群 傅里叶级数 传输线 矿井 瞬态骚扰 

分 类 号：TD65[矿业工程—矿山机电]