城市中混合电力线路对电子信息线路的电磁感应危险影响与屏蔽技术  

Electromagnetic Induction Danger Effects and Shielding Techniques on Electronic Information Lines From Mixed Electric Power Lines in Urban Districts

作　　者：马信山[1] 

机构地区：[1]清华大学电机系,北京100084

出　　处：《电工技术学报》2007年第7期109-112,共4页Transactions of China Electrotechnical Society

摘　　要：混合电力线路是指由架空输电线和电缆组成的电力线路,其间或有或无变压器。本文研究了发生短路故障时短路电流对电子信息线路产生的电磁感应危险影响和特点,同时研究了骚扰源的屏蔽问题,分析了架空线与电缆衔接处耦合接地电阻对架空地线和电缆金属护套屏蔽作用的影响规律,提出了其屏蔽作用的评估方法。最后应用实例验证了上述理论分析的正确性和有效性。The mixed high voltage power line consists of the over-head transmission line, transformer and cable. In this paper, the electromagnetic induction danger effects and shielding techniques on electronic information lines from mixed power lines during short circuit situation are investigated. The regularity of the power line shielding factor with respect to the coupling ground resistance between the over head transmission line and cable is obtained. The shielding evaluation of grounding wires and conductors are proposed.

关 键 词：电磁兼容 电磁感应 危险影响 屏蔽系数 

分 类 号：TM15[电气工程—电工理论与新技术]