Wolong Maglev Train Test Line Traction Power Supply System

Traction power supply system is one of the core technologies in maglev railway. It gets energy from the civilian power grid and lowers its voltage, though rectifier and inverter, supply power with variable voltage and variable frequency to drive the maglev train above the long-stator linear motor's stator section, running on the speed configured by the operation control system. Propulsion principle and its structure character of maglev, results in the special power supply mode for linear synchronous motor with long stators which means sectional power supply, through traction power supply system.Based on the Shanghai Maglev Demonstration Line, this paper studied on the traction power supply system, and designed it for the Wolong Maglev Test Line. Under the actual situation of the Test Line, it focused on equipment selection and design, for the traction power supply system, and used S7-300 of Siemens as the controller. According to the power supply switching mode for the stator sections and communication with the operation control system, it designed software scheme for the traction power supply control system and gave program flow chart. Traction power supply control system communicated with the operation control system by PROFIBUS-DP Master/Server mode, and based on the orders from the operation control system, did corresponding operation and revert the reply message. Ground on the communication needs, meanwhile, PROFIBUS Fieldbus communication methods in S7-300 were studied. Finally, summarized the done work, and gave the prospects of the work next step.Wolong Maglev Test Line had been designed and realized. Traction power supply system also had operated on some road sections, and reached the requirement of design.