Low Latency Hybrid Hardware-in-the-Loop Simulator for Railway Traction System

In this paper, an extreme low latency and flexible real-time hardware-in-the-loop (HiL) simulator based on FPGA and digital processor is introduced and its application on an AC railway vehicle traction system composed of power electronic converter and asynchronous motor is reported. By a novel computation load balancing, a reduced FPGA resource consumption and reduced delay introduced by HiL can be achieved. The power bench validation with a real 230 kW induction motor controller shows that the proposed solution can precisely reconstruct the frequency response of the real motor in a large spectrum.