Parallel-in-Space-and-Time Scheme for Implicitly Coupled Electromechanical and Electromagnetic Transients Simulation

In this paper, we describe a parallel implementation of the implicitly coupled solution approach for combined electromechanical and electromagnetic transients simulation. In the proposed parallel-in-space-and-time scheme, the equations for transient stability (TS) are partitioned in space and the coupled-in-time electromagnetic transients equations (EMT) are partitioned in time. Thus each processor is assigned equations for a part of the TS subnetwork along with a subset of coupledin-time EMT equations. We present the implementation details of this parallel in space-and-time scheme, including parallel in space-and-time partitioning, equations for each processor, and experimentation with different linear solvers. We also discuss the scalability of the proposed scheme on different test systems.