A Comparative Study of Gauss-Seidel, Fast Decoupled, and Newton-Raphson Methods for Power Flow Analysis in Microgrids

Power flow analysis is a must while planning, designing and expanding power networks. There are various methods proposed in literature for power flow studies. In this work, power plow analysis is carried out for a microgrid with six buses. Three methods are considered viz, Gauss-Seidel, Fast Decoupled and Newton-Raphson method. The system contains two synchronous generators. Simulation is carried out in MATLAB. The power flow in lines, bus voltage magnitude & phase angle and the comparative results are presented in this paper. The real and reactive power losses are minimum for Fast Decoupled method. The real power loss was observed to be 0.219(pu) and the reactive power loss was 57.876(pu). Therefore, Fast Decoupled method can be used for power flow analysis in microgrids.