Optimal power flow schedules with reduced low-frequency oscillations

The dynamic response of power grids to small events or persistent stochastic disturbances influences their stable operation. Low-frequency inter-area oscillations are particular concern due insufficient damping. This paper studies the effect operating point on linear time-invariant dynamics networks. A pertinent metric based frequency grid is proposed quantify system’s stability against oscillations. We further put forth an optimal flow formulation yield a dispatch that optimizes this novel metric. semidefinite program (SDP) relaxation employed computationally tractable convex problem. Numerical tests IEEE-39 bus system demonstrate SDP exact yielding rank-1 solution. relative trade-off small-signal versus generation cost also studied. • Aimed at reducing low-frequency in systems. Formally relates stability. Introduces well-defined Dispatches generators reduce Puts numerically found be exact.