The Convergence Characteristic of the Fast Decoupled Load Flow Technique

Abstract

A Fortran program is written using matrix sparsity for the inversion of the coefficient matrix and two aspects of the convergence characteristic of the fast decoupled load flow technique are investigated. These are, effects of the starting values and effects of R/X ratio of transmission lines. The analysis is based on computational results and not on theoretical study. A threshold level of R/X ratio above which convergence is not reliable is determined.