Real-Time Power System Dynamics Simulation Using a Parallel Block-Jacobi Preconditioned Newton-GMRES Scheme

Real-time dynamics simulation of large-scale power systems is a computational challenge because of the need to solve 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 Newton´s method. We present a parallel linear solution scheme using the Krylov subspace-based iterative solver GMRES with a BlockJacobi preconditioner. The scheme shows promise for real-time dynamics simulation, with 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.