This research deals with the use of a calculus method in multi-criteria optimization. A modification do the algorithm of variable integration was carried out, in order to establish a terminal criterion during the multi-objective optimization of the reactive power compensation, in electric supply nets. It demanded the use of heuristic techniques, where the existence of high number of nodes, guided the research towards methods able to minimize the required processing time to find a solution, without affecting the quality of the results, and the convergence of the process, in spite of the high number of present members within the total population to be evaluated.