Fuzzy distribution load flow

In this paper, a fuzzy model for distribution system operation is presented . Uncertainties in loads are modeled as fuzzy numbers. A voltage stability index for each node of radial distribution networks is also proposed. The c onditions for voltage collapse to occur are easily derived from this voltag e stability index. Among the results, one obtains possibility distributions for substation current, voltage stability index, real and reactive power l osses, etc. A general discussion on the results, along with the advantages and disadvantages of the approach, is presented.