Nowadays, transport network of electrical energy operate beyond their thermal limit, due to growing populations, industrialization and modernization needs. To this end, multi-term power lines are erected in order to ensure the transit of the requested energy while ensuring the stability of the electrical network. But when there is loss of one term of these lines for various reasons (short circuits and others), a problem of transit of this energy is posed. Sure, several research works have been the subject of publications in terms of power transit optimization, however the case of the loss of a term of a transmission line is still a challenge. It is clear that when there is a loss of a term of a line, the power transmitted is reduced because of the increase in the impedance of this line. This study proposes an approach that optimizes the transit of electrical energy post-incident. To do this, the use of the third generation FACTS in this case the UPFC allows us to obtain the expected results. The interest of this work is to satisfy even in emergency or post-contingency conditions the demand for electrical energy while ensuring the stability of the system.
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