Design of Fpga-Based Real-Time Inverter Emulator

Compared to offline simulation, real-time simulation can more accurately and effectively replicate the dynamic behavior of inverters. This paper presents the development and design of an FPGA-based real-time inverter simulator. The inverter is modeled using the binary LC method, and the model accuracy is improved by applying the enhanced binary LC method and the trapezoidal integration method. A multi-channel synchronized DAC based on FPGA is designed for the real-time simulator, achieving an average input-output signal delay of 45 μs. Unlike automatic model code generation techniques, the inverter’s detailed FPGA model is directly implemented using Verilog Hardware Description Language (HDL). Taking an LC-filtered three-phase inverter as an example, simulations are conducted to verify the accuracy of the designed real-time simulator.