In the present work, we applied a new control strategy of power systems based on a technique for classifying areas of an electrical network (generators, lines, etc.) taking into account both margins variations of variables given state and secondly, the impact of various faults each weighted by its probability of occurrence. Indeed, this technique, designated by fuzzy biclustering, was established by reference to a database, character matrix [M-B], lines established by the events EVi weighted by their probabilities and columns by state variables selected delta(i) (total load angle).