A time-stacking method is disclosed. The time-stacking method simulates dynamics so as to obtain time-domain trajectories which correspond to a disturbance or event. The method includes providing a model for the system. The model includes differential equations and algebraic equations. The method also includes solving the differential equations and the algebraic equations over a predetermined number of time steps simultaneously using an implicit integration scheme.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with Government support under Contract DE-AC05-76RL01830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.