New findings of convergence properties of fast decoupled load flow algorithms

The authors presents the result of an extensive study of several typical power systems to explore a fast decoupled load flow (FDLF) model that can exhibit the best convergence property for both well-behaved and ill-conditioned systems. An attempt is made to examine the relative importance of several parameters, such as line series resistances, shunt reactances and transformer tappings. Results reveal that a reverse Stott model achieves more or less the best convergence of the FDLF solution, irrespective of whether the systems are well-behaved or ill-conditioned