Small-Step Real-Time Simulation for VSC Based on FPGA

The voltage source converter (VSC) has been widely used in the new power system. Its electromagnetic transient simulation has the characteristics of low simulation speed and high resource consumption. In this paper, the small-step real-time simulator for VSC based on field programmable gate array (FPGA) is established. Firstly, the fixed-admittance model for VSC is established to improve the calculation speed of the primary system. At the same time, the parallel computing process of the primary system is designed to achieve small-step real-time computing of the primary system for VSC based on the parallel computing architecture of FPGA. Secondly, according to the logic of the control system for VSC, the serial-parallel computing process of the control system is designed, and the controller for VSC is implemented based on FPGA. Finally, the performance of the established FPGA simulator is verified based on the control experiments on PSCAD/EMTDC.