A noniterative load flow algorithm for radial distribution networks using fuzzy set approach and interval arithmetic

This article presents application of fuzzy set theory and interval arithmetic for computing the branch currents, node voltages, total real and reactive power losses. First load currents at every node are estimated based on hourly load pattern of different types of consumers using fuzzy set theory. Once the fuzzy load currents at each node are estimated, a node identification algorithm beyond each branch is used to compute the branch currents using the concepts of arithmetic operation on closed intervals. Node voltages are computed using the simple relationship of sending end and receiving end voltages and using the concept of arithmetic operations on closed intervals. The effectiveness of the proposed method is demonstrated through an example.