A novel critical fault screening method using time domain equal-area criterion considering controllers

Recently, in Japan, deregulation has resulted in a huge and complicated power system. In order to prevent massive blackouts in such a system, we must focus our attention on transient stability, in particular, time domain equal area criterion (TDEAC). First, we propose two indices for critical fault screening by TDEAC using the classical model as a generator model and we verify the validity of the proposed indices with simulations. Second, we propose TDEAC considering controllers (TDEACC) using a detailed model based on Park equations as a generator model and explain the differences in ranks between models. Finally, we apply the two proposed indices to TDEACC and verify the validity of the proposed indices for critical fault screening and reduction in simulation time.