The purpose of the task is to show the elements of the distribution network modeling and calculation of power flows on the network. This takes into account the specifics of the distribution network, such as grounding lines and transformers and consideration skewing network impedances. Using the network model is shown in the case of the calculation of voltages and currents NN cable taking into account the different levels of resistance grounding neutral conductor.
To calculate voltages and currents for the Network under normal condition due to non-linear loads used ladder method (iterative methods). I analyzed current and voltage conditions NN cable for symmetric load, source and asymmetric load, source.
At the end I modeled short-circuit network model, which allows the calculation of voltages and currents in the one phase SC with earth contact, two phase SC, two phase SC with earth contact, three phase SC and 3 phase SC with a touch of earth where loads are not taken into account.