This paper presents a comparative study on convergence characteristics of the main three-phase power flow methods, namely, conventional polar, conventional rectangular and current injection formulations, for solving the three-phase power flow problem. The nonlinear equations are solved iteratively through Newton-Raphson approach. Both unbalanced and ill-conditioned three-phase power systems are tested in order to provide information on performance of each one of the methods under analysis. The convergence characteristics are evaluated by increasing the loading factor and the branch R/X ratios.
Three-Phase Power Flow; Conventional Polar; Conventional Rectangular; Current Injection
