A real-Time co-simulation research based on VSC closed-loop control

Power electronic systems do not always operate under ideal condition because of the conflict between computational efficiency and simulation precision. In addition, there is significant computation burden in real-Time simulation of voltage source converter closed-loop control. Hence, the power electronic real-Time co-simulation design based on FPGA+DSP+PC architecture is put forward. The design adopts continuous-discontinuous model separation method to segment VSC model and extract the parameters, combines switching-function approach with state-space approach to design the float point solver, and uses a system rapid prototyping method to build a simulation system model. A three phase two level closed-loop control system case which based on SPWM wave is selected for real-Time multi-rate simulation test. The paper illustrates how a co-simulation designed for VSC closed-loop control can be efficiently used to solve above issue.