Three-phase Power Flow for the Weakly Meshed Distribution Network With the Distributed Generation

Traditional power flow algorithms are not applicable to the distribution network with distributed generation because of the unbalance in power source,load and line. Based on the analysis of wind turbines,photovoltaic system,fuel cell,storage battery,high frequency micro turbines and power frequency combined heat and power(CHP) ,their models in power flow calculation were presented. In view of unbalance in three phases and weakly meshed characteristics of the distribution network,the back/forward sweep algorithm in power flow calculation was improved,which was widely used for the radial distribution network. A new three phase back/forward sweep power flow calculation for the weakly meshed distribution network with the distributed generation was presented. The example has proved the efficiency and feasibility of the algorithm.