Loss Allocation in Radial Distribution System with Distributed Geration

Due to the liberalization of the electricity market and the introduction of distributed generation (DG), the importance of distribution loss allocation (LA) has incremented. This paper presents developing method for distribution power LA in radial systems. The proposed method, which based on the results of power flow and considers active and reactive power flows of lines for Loss Allocation (LA) is composed of three steps. In the first step, starting from the source nodes, the puissance loss allocated to all nodes is calculated and then the power loss allocated to the loads connected to each node is obtain. In the next step, the total power loss is allocated to the nodes in order to calculate the power loss allocated to the DGs predicated on the results of this step. In contrast to the precursor step, in this step, allocating power losses to the nodes commences from sink nodes, which are the nodes whose load is more than their generation. In the final step, normalization is executed. The application of the proposed method is illustrated on two distribution feeders, and the results are compared with Genetic Algorithm Loss Allocation method.