Research on Technical Scheme of On-board Equipment Transformation of Signal System Renovation Project in Urban Rail Transit
The signal system of the Shenzhen Metro Line 3 has been renovated from CITYFLO 650-I FULL CBTC system to TRANAVI CBTC system and the corresponding on-board equipment of TRANAVI CBTC system needs to be installed on the existing trains.Due to the existing signal on-board equipment occupying the optimal installation position,the space in the vehicle electrical cabinet,the axle end under the vehicle,and the space under the vehicle cannot directly meet the installation requirements of the new equipment.Therefore,it is necessary to determine technical scheme of on-board equipment of signal system transformation of Shenzhen Metro Line 3 based on the situation of the existing on-board equipment and the redundancy configuration method of mainstream on-board equipment of signal system in China.It is recommended to adopt a dual ended redundant on-board equipment configuration scheme to improve the reliability and availability of the new system.Besides,the interface installation scheme between the on-board equipment and the vehicle is also clarified.In the transitional stage of equipment renovation,it is proposed to set up one inverted switch at each end of the train respectively to achieve seamless connection between the old and new signal system to control trains.The technical scheme can provide reference for the installation of on-board equipment for other urban rail transit signal system renovation lines.
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