Hardware-in-the-loop Real-time Simulation of Back-to-back Converter for Doubly-fed Wind Power Generation System Based on FPGA

Hardware-in-the-loop (HIL) real-time simulation is an effective method for fast verification of high-power back-to-back converter. In this paper, a HIL real-time simulation bench is built with FPGA as the core. Using Verilog hardware description language (HDL), the HIL real-time model of back-to-back converter and doubly-fed induction generator (DFIG) is established in FPGA. Compared with the 5.5kW full-physical bench, the results show that the maximum error between the HIL bench and full-physical bench is less than 5% and the time delay of the HIL real-time model is 0.36μs. Therefore, the HIL bench established in this paper is real-time and accurate, which is of great significance to the design and fast verification of high-power grid-connected back-to-back converter for DFIG system.