Modified Newton method for reactive dispatching

This paper describes a new approach to the optimal reactive dispatch problem, based on an augmented Lagrangian function of the original problem. The Karush–Kuhn–Tucker (KKT) optimality conditions are solved by the modified Newton method. The second-order information in the original system of equations is approximated and the first-order information is kept intact The proposed method requires less computer memory than those algorithms currently available. The effectiveness of the proposed approach has been examined by solving the IEEE 30-bus and the BRAZILIAN 810-bus systems.