Load Flow Analysis of Radial and Weakly Meshed Distribution System

Abstract

The distribution system provides the link between bulk power system and consumer. The distributors connect the individual load points to the main feeder. The distribution systems are of two types namely radial and weakly system has closed loops where as radial structure is free from loops. The classical methods like Gauss Seidel and Newton Raphson are inefficient in solving distribution network because of its typical features such as high R/X ratio. A distinctive load flow solution method is used for analysis of the load flow of radial and weakly meshed network. This method has excellent convergence characteristics for both radial as well as weakly meshed structure. A (bus injection to branch current) matrix formed to calculate branch currents. This matrix is obtained using Kirchhoff’s current law for distribution network. Bus voltages are found by forward sweep of the network. The meshed structure of the distribution system is taken care by (line injection to loop current matrix). The performance has been tested on 33-bus and 69-bus distribution systems.