This paper proposes an intelligent traction power supply system for urban rail transits, employing the wireless 4G modules to establish a communication loop among the trains, the ground bidirectional converters and the top-level energy management system. On this basis, an energy-conscious management system is developed, which obtains the instantaneous power and position of each train, parameters of the traction power supply system, real-time status of the substations and bidirectional converters through the 4G based communication loop to realize the digital reconstruction of the real traction power system for facilitating the ensuing optimizations. As physical executors, the bidirectional converters acquire their optimal DC output voltages from the genetic algorithm and then coordinately achieve the power flow dispatching of the entire metro line, so as to make the metro traction power system have a better power supply quantity and a higher efficiency. The full power scale (6.4 Mega-Watt) experiments conducted in actual Ningbo Metro Line 4 verify that the proposed EMS system is effective in energy-saving.

中文翻译：

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4G通信环路智能地铁牵引供电系统的节能管理

本文提出了一种城市轨道交通智能牵引供电系统，利用无线4G模块在列车、地面双向变流器和顶层能源管理系统之间建立通信回路。在此基础上，开发了节能管理系统，通过基于4G的通信回路获取每列列车的瞬时功率和位置、牵引供电系统参数、变电站和双向变流器的实时状态，实现对真实牵引电力系统进行数字化重构，以利于后续优化。双向变流器作为物理执行器，通过遗传算法获取各自的最优直流输出电压，协调实现全地铁线路的潮流调度，使地铁牵引电力系统具有更好的供电量和更高的效率。 。在实际的宁波地铁4号线中进行的全功率规模（6.4兆瓦）实验验证了所提出的EMS系统的节能效果。