Convergence Properties of the Waveform Relaxation Method as Applied to Electric Power Systems

Marija D. Ilić
J. K. White
Mariesa Crow, Missouri University of Science and Technology

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Several theoretical results are presented and simple examples examined in order to determine the suitability of waveform relaxation for transient power system simulation. This examination leads to two practical suggestions that can easily be satisfied for power systems. The first is to break the simulation interval into sections, the first of which should be narrow and be used to kill off errors in the initial guess that activate the stiff modes. The second is to partition the system into subsystems that are stable, as this not only aids convergence but ensures multirate numerical stability.