Abstract
This chapter presents a linear model to determine node voltages and branch currents of unbalanced power distribution systems (PDS). The model allows to obtain approximate solutions for the load flow problem trough the solution of a system of linear equations, instead of using an iterative process as in the conventional load flow. Besides, a discussion on load modeling in PDS is presented to support the proposed model. Numerical studies are presented using a modified version of the IEEE 34-node test feeder. The agreement of results obtained with our linear model with corresponding results obtained through a conventional nonlinear load flow allowed to conclude that the proposed model is not only valid but also can give accurate results.
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