Understanding Load Flow Studies by using PSAT

Load Flow Study (LFS) is the heart of most system-planning studies and also the starting point for transient and dynamic stability studies. The load flow problem models the nonlinear relationships among bus power injections, power demands, and bus voltages and angles, with the network constants providing the circuit parameters. This article provides formulations of the load LFSs. Load Flow are necessary for planning, operation, economic scheduling and exchange of power between utilities. The principal information of LFS is to find the magnitude and phase angle of voltage at each bus and the real and reactive Load flowing in each transmission lines. LFS is a significant tool involving numerical studies applied to a power system. In this article, iterative techniques are used due to there no known analytical method to solve the problem. To finish this studies there are methods of mathematical calculations which consist plenty of step depend on the size of system. This process is difficult and takes a lot of times to perform by hand. LFS software package develops by the author use Power System Analyses Toolbox (PSAT).