Novel extended equal area criteria with detailed power system models

Incorporated into extended equal area criteria (EEAC) in a parametric manner, detailed models of generators with field flux decays and excitation systems in varying degrees are taken into consideration. A simple and convenient cluster of modular EEACs with excellent adaptability both in model and application environment are developed in this paper. Corresponding methods to calculate the critical clearing angle (CCA) of the one machine infinite bus (OMIB) system are constructed in fully analytical forms. A new approach for correction of large errors of EEAC resulting from inaccurate OMIB equivalency is proposed. The invalidity of EEAC is greatly minimized. >