Real time simulation of high power converter for traction system

A novel real time simulation (RTS) system for high power rail traction is developed. It includes simulation models of high power back-to-back converter and a synchronous motor (SM). The system runs on a dSPACE based platform connected to real converter and motor controllers by actual hardware interface. An algorithm of decoupling discrete event of converters and continuous time systems of SM is proposed. Multi-rate computation have been applied for the simulation of the system with slow (machine, capacitor and transformer) and fast dynamic (converter) components. System models are developed by using switching function, nodal analysis and Park equations respectively. Experimental results show the developed RTS model can realize hardware-in-the-loop (HIL) operation to test the real system effectively.