Design and implementation of a real-time simulation test system for rectifying devices

In order to reduce the development costs and shorten the development period of power electronic experiments, a real-time digital simulation test system for rectifying devices is presented in this paper. This system combines the traditional simulation software SIMULINK with high-performance industrial personal computer (IPC). SIMULINK is used to create system model and the interface module. The RTW toolbox provided by SIMULINK is used to convert the model to C code, which is then uploaded to the IPC. When the C code runs, the test signals required by the control board are output through the I/O or Ethernet port. What's more, the simulation model can be modified in real time according to the control signal fed back by the control board, and can also be used to carry on the hardware-in-loop simulation test. In this paper, many problems were solved or mitigated, such as numerical oscillation in the off-line simulation, the cumbersome process of the model converting to C code, and the real-time performance of the task scheduling strategy of the computing unit. At last, some experiments were done to show that the system has strong real-time performance and can be used in the experiment of rectifier.