  An iterative coupling algorithm based on 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 co-simulation 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. Numerical
tests on a linear RLC circuit combining EMT and TS modeling are provided.
