A GPU-Based Multi-Rate EMT Simulator for Simulation of Large Power Systems

The increasing integration of inverter-based resources (IBRs) presents significant challenges for Electromagnetic Transient (EMT) simulations. Frequent changes in the admittance matrix, driven by switching events in IBRs, require repeated factorization of the network equation, further increasing computational demands. Using general-purpose Graphical Processing Units (GPUs), EMT simulations can achieve substantial performance improvements. This paper introduces a fully functional GPU-based EMT simulator that incorporates the compensation method for enhanced efficiency. This approach is particularly advantageous in scenarios with high IBR penetration, as it facilitates the use of multirate simulation techniques. The proposed simulator demonstrates significant potential for addressing the computational challenges of modern power systems with significant IBR integration.