Security Assessment and Control System : Corrective Strategies

A complete methodology for the solution of the real and the reactive subproblems of the general optimization problem that appears as part of the corrective strategies function of power system control centers is presented and analyzed. The method takes advantage of the linear behavior of the incremental relationships between the constraints and the controls. It dynamically selects a set of control variables for every iteration depending on the amount of overload to be corrected in the particular iteration. The algorithm has been used to alleviate several overloads for the IEEE 118 bus system under high and low loading conditions.