Co-simulation domain decomposition algorithm for hybrid EMT-Dynamic Phasor modeling

An iterative coupling algorithm based on a restricted additive Schwarz domain decomposition is investigated to co-simulate electrical circuits with hybrid electromagnetic (EMT) and transient stability (TS) modeled using dynamic phasors. This co-simulation algorithm does not introduce any delay between the data exchanged at the cosimulation step. The pure linear convergence property of the iterative method allows it to be accelerated towards the true solution by a non-intrusive Aitken's acceleration of the convergence post-processing, even if the domain decomposition interface conditions make the iterative method divergent. This provides a method less sensitive to the splitting. This algorithm can then be implemented in a distributed master-slaves architecture. An example on a linear RLC circuit combining EMT and TS modeling, and a partitionning with overlap is given