Hardware-in-the-loop Real-time Simulation of High-power Inverter Based on Electro-thermal Coupling Effect

Hardware-in-the-loop (HIL) real-time simulation is a powerful tool for fast verification of high-power inverter performance. On the FPGA-based HIL platform, the real-time model of the inverter was established by Verilog hardware description language (HDL), and the power loss and temperature rise of the inverter were monitored in real time. The loss model uses bilinear interpolation and the temperature rise model uses the equivalent thermal network method. Compared with the 80kW physical inverter, the experimental results show that the HIL real-time model can meet the real-time requirements. The delay for the entire HIL real-time model is 0.44μs. The maximum error of temperature rise calculation is 4.9%, and the average error is 3.4%.