Analysis of Transient Overvoltage in Electrical Networks using Elaborate Code and PSCAD

Electrical networks are a complex field of study, and the stronghold of phenomena that are not always easy to describe, to treat, to analyse, as in the case of incidents caused by short circuits, accidental arcs, lightning, tripping of works, etc. All these phenomena lead us to focus particularly on their immediate effects from their appearance until their disappearance or elimination. The duration of this type of fault thus generates a crucial and sometimes critical transient period for the electrical networks affected, as it is generally very short, but can have disastrous consequences going as far as the total collapse of the network (black-out). In this work, we created our own code for simulating electrical network transients in the MATLAB environment using the Toolbox Simulink package to try to replace transient software (such as PSCAD), even if the steps to be taken are not can claim to result in such a professional program as PSCAD software. The purpose of this work is the study of transient overvoltage in electrical networks using elaborate code and PSCAD software. We have tried in the introduction of this work to provide a description of transient overvoltage: definition of transients, Sources of transients, Categories of transients. Secondly, we discussed the elaborate code, which I named MATP (Matlab Analysis Transients Program), which was created in MATLAB giving a description of the code and their structure with graphic windows, and then I privately described the software PSCAD. Then we simulated several faults such as: a line opening fault, a short-circuit fault, for a networked system: electrical network 05 nodes. At the end, we analysed the results of the two programs for the faults mentioned above with our electrical networks.