A Study on a Solution of Equivalent Cost Based Optimal Power Flow (ECBOPF) to Restore System Solvability

Abstract

This paper presents a method for solving optimal power flow (OPF) problems to restore solvability. The formulation of the proposed OPF is based on equivalent costs with respect to load demand scenario and constraint slacks. Since the proposed Equivalent Cost Based OPF (ECBOPF) in which load demand scenario parameter and constraint slacks are treated as decision variables, the information on unsolvability with respect to each load demand and each constraint can be obtained. In addition, since the proposed method whose objective function includes the equivalent costs of load demand error and constraint slacks, it is possible to do the strategic analysis from the viewpoint of costing on power system management. The feasibility and effectiveness of the proposed method are demonstrated on test problems with 49-bus and 2312-bus systems.