Study of system´s vulnerability due to short circuit faults considering protective devices

The purpose of this study is to determine vulnerable areas of a pilot circuit before failure. The sags are characterized in magnitude and duration as a consequence of faults. The evaluation of the sags and the time of operation of the protection are made in the nodes using simulation tools. In this way we can find the most vulnerable areas of the system that will allow the Network Operator (NO) take action to improve power quality. One way in which the NO could improve the power quality is through the protection coordination