An Efficient Load Flow Solution for Radial Distribution Network Including Voltage Dependent Load Models

An efficient load flow solution is required for automated distribution network for operation and control, and for planning and optimization. This article presents a novel load flow algorithm for solving radial distribution systems. It solves simple algebraic recursive equation of receiving end voltage. In this algorithm, different static load models have been included as the loads are voltage dependent in distribution systems. Load growth is also incorporated in this algorithm, as it is required to an engineer for distribution systems expansion, planning and operation. Using MATLAB, a program is developed which is successfully tested for several power distribution networks. The proposed algorithm is found to have superior convergence pattern and execution time for any type of load model, size of network, and R/X ratio of feeders. The proposed method is illustrated for 33-node and 69-node radial distribution systems and the effectiveness is compared with five existing methods.