Evaluation and Analysis of Three Phase Smart Power Distribution Networks in the Presence of Distributed Generation

As the installations of distributed generators (DGs) within distribution systems increasing, power flow analysis of unbalanced distribution networks needs special algorithms to handle multiple sources. In this paper, the development of an unbalanced three phase power flow algorithm which can handle multiple sources is described. According to the control and characteristics of output power, DGs can be specified as constant power factor model and constant voltage model. In this paper, these two models are all derived and integrated into the proposed load flow method. This load flow is capable of switching the DG mode of operation from constant voltage to constant power factor in the presence of multiple DGs. This algorithm has been tested with IEEE 8 bus and IEEE 25 bus unbalanced radial distribution networks and the results are presented in this paper.