Power summation method for loss allocation in radial distribution networks with dispersed generation

The paper presents a new method for allocation of losses in distribution networks (DN) with dispersed generation (DG) is presented. The method uses the power summation method, and it is based on the branch oriented approach and it establishes direct relationship between losses in each branch of the network and injected active and reactive power in the nodes. Active and reactive power at ending node of each branch of the network is decomposed as a sum of all injected power in nodes plus losses in the branches supplied by the branch. Allocation of crossed terms of active and reactive power is performed using quadratic allocation of crossed terms. Dispersed generators in the summation process are treated as negative active and reactive power injections, while load injected active and reactive power are considered positive. Results of the application of the method on 32-node test system are presented and discussed.