ABSTRACT
Power flow studies are extremely important in evaluating the operation of power systems, controlling them, and planning for future expansions. For specified bus conditions, a power flow study yields mainly the real and reactive power flows and phasor voltage at each bus on the system, although much additional information is available from the computer printouts of typical power flow studies. This chapter considers the fast decoupled power method which is a modified Newton-Raphson method especially applicable to conditions existing in a power system. A power system has a large number of buses. In this case, a systematic formulation of voltage-current relationships in terms of network admittances facilitates the solution of power flow problems. The Newton-Raphson iterative procedure converges much more quickly than the Gauss-Seidel process and is generally the method of choice for solving power flow problems. Finally, the fast decoupled power method is essentially a modified Newton-Raphson method, and involves relatively less computation time.
