Comparison of general and fuzzy set load estimation in radial distribution network power flow

Abstract

This paper presents application of fuzzy set theory and interval arithmetic for computing the branch currents, node voltages. 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, then by using forward path information matrix the branch currents are computed using the concepts of arithmetic operations 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. It is also compared with the general load estimation process.