Co-simulation of an FPGA-based Electromagnetic Transient Model and a Small Time-Step Model in the RTDS Real-Time Digital Simulator

This paper describes work in electromagnetic transient co-simulation of a field-programmable gate array (FPGA)-based model with an RTDS Real-Time Digital Simulator. Results are presented toward achieving the goal of simulating high-frequency power electronic converters in real-time co-simulation with a rest-of-system transient model. Power system converter models using the RTDS were previously implemented at rates up to approximately 6 kHz switching frequency using voltage source converter models in a small time-step of similar to 1.5-2 mu secs. In this work, the FPGA-based transient simulation models of a static and switched RL load are interfaced to the RTDS small time-step model through a traveling wave model. The high-frequency switching models suggest the feasibility of FPGA-based simulation of a high-frequency switching converter.