An iterative method for simulation of large scale modular systems using reduced order models

We describe a new iterative method for simulation of large scale modular systems using reduced order models that preserve the interconnection structure. Our technique essentially involves simulating in turn each subsystem connected to model reduced versions of the rest of the subsystems. The data from this simulation is then used to update the reduced model for that particular subsystem. We illustrate the method using a power grid example modelled by nonlinear swing equations