电气化铁路通道组网方案的探讨

研究目的:随着国务院批准的《中长期铁路网规划》的实施,电气化铁道牵引供电远动系统将得到更广泛的应用,在设计中,如何选择设计合理的牵引供电远动系统的重要组成部分———电气化铁路远动通道。研究方法:分析主控站和被控站设备对通道的要求及接口方案,以及国内电气化铁路的通信网络建设现状,结合近几年国内通信领域日益兴起的MSTP(综合业务传输平台)技术,进行研究。研究结果:给出了电气化铁路远动通道组成方案的建议意见,并预测了电气化铁路远动通道的发展趋势。研究结论:(1)远动通道:当被控站较多、尤其是占用长途通道较多时,建议以调度台为单位组成2 Mbps自愈环网、采用2M E1接口,控制站及被控站均加设路由器、IP寻址方式,若考虑路由器也有备用,则组2个2 Mbps自愈环网;当被控站较少、基本上不占用长途通道时,可采用一主一备的64 k点对点方式,采用64 k4线音频板、同步/异步RS232/RS422/RS485接口。(2)视频通道:当被控站较多时,采用以调度台为单位组成2 Mbps自愈环网;当被控站较少、仅为增加个别被控站时,通过经济比较,也可采用2 Mbps点对点方式。(3)近几年国内通信领域日益兴起的MSTP(综合业务传输平台)技术应成为电气化铁路专网建设的首选,应很好的整合被控站内的综自系统、视频监控、MIS等传输网络,从而实现一种网络提供多种业务平台。

Program Exploration on Establishing Communication Channel Net for Electrified Railway

Research purposes: Remote control system of traction power feeding for electrified railway will be adopted widely with implement of "Medium and Long Term Railway Net".How to choose proper remote control system of(communication) channel for electrified railway is important in design,since the system is an important part of traction feeding system.Research methods:The analysis is made for the requirements of main control station and controlled station for the(communication) channel and the interface's program.The introduction is given to the construction situation of(communication) net for electrified railway.The research is made in combination with MSTP technology that is now(popular) domestically.Research results:The suggestion is proposed to the program of establishing communication channel of remote(control) system for electrified railway.The prediction is made about development trend of communication channel of remote(control) system for electrified railway.Research conclusions:(1) Remote Control Communication Channel: When there are many controlled stations,(especially) they occupy many remote communication channels,it suggests to establish 2 Mbps self-heal loop net based on the control-platform unit,with adopting 2 M E1 interface,installation of router in control station and the controlled station and adopting IP searching address mode.If a standby router is needed,two 2 Mbps self-heal loop nets can be established.When there are a few control stations and they seldom occupy remote communication channel,the 64 k point-to-point mode of one-running and one-standby can be adopted with 64 k 4 line audio frequency board and synchronous/asynchronous RS232/RS422/RS485 interface.(2) Video Frequency Communication Channel: When there are many controlled stations,the 2 Mbps self-heal loop net can be established based on the control-platform unit.When there are a few controlled stations and only one or two controlled stations to add,the 2Mbps point to point mode can be adopted for purpose of saving money.(3) MSTP technology,which is now popular in communication field(domestically),should be the first choice for construction of the special net for electrified railway.Application of this(technology) can integrate the controlled station's synthesis automation system,video inspect control system,MIS(transmission) net together and so on,and realize that one net offers and supports manifold function platform.