This paper presents an analytical method for the analysis of the transient behaviour of extended distribution networks during shortcircuits or start-up using interactive, graphical techniques. A fast algorithm is employed which exploits the radial nature of the network to calculate the nodal voltages. Two models are available for the transient analysis of the induction motors, which canbeused according to the degree of detail desired. Typical load types for each distribution substation are considered and the parameters of the loads at each node are determined by the relevant composition of the aggregate nodal load. Disturbances provoked by any type of short circuit are considered and the user can obtain the currents and voltages at any point of the radial network s2lected.The program is applied to the analysis of the transient behavior of a realistic distribution network during faults on the network. The response of the network in case of faults on the supply system is also considered and the results are compared with the corresponding response when the loads are considered concentrated.
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