Méthodes de calcul des courants de courts-circuits pour les réseaux à très haute tension

An equivalent to the EHV, Hydro-Quebec Network has been simulated so as to estimate the error introduced in short circuit calculations by the neglect of shunt elements: loads, shunt compensation and line charging. In order to take shunt elements into account, it is necessary to include in the short circuit study, in addition to shunt elements themselves, the initial voltage bus angles and magnitudes such as computed by a load flow study. Neglecting shunt elements in bundled conductor networks can result in large errors (up to 40%) in the computed short circuit currents. It does not seem possible to predict the direction or magnitudes of the errors a priori. A procedure is proposed to eliminate these errors.