A Multi-Instance, Multi-Timestep Co-Simulation Approach for Power System Simulation Tools

This paper proposes a Co-Simulation concept that couples two or more simulators utilizing different timesteps. The interprocess communication is handled via a shared memory based algorithm. Unfavorable effects due to the conversion between time steps are eliminated using filters. The electrical representation is based on a Bergeron line model utilizing the dependency of time and location of travelling waves along transmission lines. The proposed Co-Simulation has minimal impact on accuracy while greatly reducing simulation execution time.