Fieldbus Power Supply System Of Maglev Train

As one of primary technologies in MAGLEV, traction power supply system realizes the control and supply of power for MAGLEV operation's need. Propulsion theory and its structure character of MAGLEV result in'the special power supply mode for linear synchronous motor with long stators through power supply system. Because MAGLEV has the character of high speed, then for power supply system's monitor and control and for long stator winding's power supply, high real-time is required. It will be one of key problems that power supply system faces in MAGLEV.This paper introduces control and function of traction power supply system in Shanghai MAGLEV demonstration, and analyzes control framework of power supply system, and so puts forward layered network framework for substation automation based on PROFIBUS-DP. Some corresponding communication theory, and bus and network's parameters etc. are emphatically introduced. With application of the substation automation system in MAGLEV, this paper provides several real-time ways to increase the control system based on PROFIBUS-DP. And at the same time, the schemes for solving the requirement for power supply system's real-time by MAGLEV will be given.Based on the layered network framework for power supply system, this paper introduces corresponding devices of SIMENS,CT etc., structures simulation system for power supply based on PROFIBUS-DP, and basically realizes some primary functions of substation automation, operation control system and traction power supply system. Finally, some directions based on this simulation system for deeply researching MAGLEV system are brought forwards.