An approach for fast cascading failure simulation in dynamic models of power systems

The ground truth for cascading failure in power system can only be obtained through a detailed dynamic model involving nonlinear differential and algebraic equations whose solution process is computationally expensive. This has prohibited adoption of such models simulation. To solve this, we propose fast simulation approach based on implicit Backward Euler method (BEM) with stiff decay property. Unfortunately, BEM suffers from hyperstability issue case oscillatory instability converges to the unstable equilibrium. We predictor–corrector fully address BEM. predictor identifies eigendecomposition matrix at post-disturbance equilibrium as byproduct corrector uses right eigenvectors identify group machines participating mode. helps applying appropriate protection schemes truth. use Trapezoidal (TM)-based benchmark validate results proposed IEEE 118-bus network, 2383-bus Polish grid, 68-bus system. able track cascade path replicate end TM-based very high accuracy while reducing average time by ≈10−35 fold. was also compared partitioned method, which led similar conclusions.