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Parallel Dynamics Simulation Using a Krylov-Schwarz Linear Solution Scheme
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DOI：10.1109/TSG.2016.2610863.png)
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摘要
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Fast 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 at every time step. The main bottleneck in dynamic simulations is the solution of a linear system during each nonlinear iteration of Newton's method. In this paper, we present a parallel Krylov-Schwarz linear solution scheme that uses the Krylov subspace-based iterative linear solver GMRES with an overlapping restricted additive Schwarz preconditioner. Performance tests of the proposed Krylov-Schwarz scheme for several large test cases ranging from 2000 to 20 000 buses, including a real utility network, show good scalability on different computing architectures.
Keyword:
Dynamics simulation
GMRES
iterative linear solution
Krylov subspace
parallel processing
Schwarz preconditioning
transient stability
power system dynamics
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