站房防雷接地的设计思考

Thinking on Design of Earthing for Lightning for Station Building

研究目的:铁路站房有大量的旅客滞留,同时站房内设有供配电系统、建筑智能化以及客运服务、通信、信号等运输调度系统,为了保证人员、设备和运输生产的安全,必须做好站房的直击雷和雷击电磁脉冲防护,本文对站房的防雷接地进行系统研究,指出设计中的关键点。研究结论:通过分析得出:(1)铁路综合站房的雷电防护应采用外部防雷和内部防雷相结合的手段;(2)等电位联结是所有防雷措施中最为关键的一条;(3)综合接地1Ω的要求并不是每座建筑物都应满足。

Research purposes： There are lots of passengers staying in the railway station building in where there are the power supply and distribution systems, the building intelligent systems and the transportation dispatching systems and the communication and signal systems. In order to guarantee the safeties of the personnels, facilities and transportation production, the protection of direct lightning flash and lightning electromagnetic impulses （LEMP） must be well done for the station building. The earthing for lightning is systematacially studied in this paper and the key points of design are presented. Research conclusions：From the the analysis it is concluded （1） The external lightning protection should be used along with the internal lightning protection for the lighting protection for station building. （2） The equivalent potential bonding is the most critical measure for lightning protection. （3） The comprehensive earthing requirements of 1 ohm has not to be meet by every building.