“…Although monitoring applications are now found in several utilities, control applications for improving angular and voltage stability are still scarce and a challenging issue [12]. However, several works on the use of phasor measurement for power system control have presented theoretical foundations for a more disseminated use of this new technology for control applications, as for instance, references [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24]. This paper presents a design method for a hierarchical twolevel control scheme aiming at the enhancement of power system small-signal stability, using a multivariable system approach.…”