A load flow algorithm for radial systems having renewable energy generation sources

In this paper, an algorithm for obtaining load flow solutions for radial systems having generation based on renewable energy have been presented. These renewable distributed generations (DG) in the radial distribution system are modeled as active power and voltage magnitude specified buses (PV) and complex power specified buses (PQ). This method uses an improved backward forward sweep method where the line flows are considered and a solution based on quadratic equation is employed. For handling PV buses, a direct solution based technique is used for computing the reactive power injection to maintain the specified voltage magnitude. Thus by exploiting the radial nature of distribution systems even though generation is present, the overall convergence is improved. The proposed method has been tested with two radial systems and its results are validated.