Real-time dynamics simulation of large-scale power systems is a computational challenge due to the need of solving a large set of stiff nonlinear differential-algebraic equations. The main bottleneck in these simulations is the solution of the linear system during each nonlinear iteration of the Newton{\textquoteright}s method. We present a parallel linear solution scheme using Krylov subspace based iterative solver GMRES with a Block-Jacobi preconditioner that shows promising prospect of a real-time dynamics simulation. The proposed linear solution scheme shows a good speed up for a 2383 bus, 327 generator test case. Results obtained for both stable and unstable operating conditions show that real-time simulation speed can be realized by using the proposed parallel linear solution scheme.

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}, author = {Shrirang Abhyankar and A. J. Flueck} }