A practical voltage-stability-constrained optimal power flow

This paper proposes a novel and practical method to enforce a voltage stability constraint (VSC) in an optimal power flow (OPF) auction model, based on the minimum singular value and minimum singular vectors of the power flow Jacobian. The proposed technique is based on a singular value decomposition of the power flow Jacobian at a given solution point, plus an iterative process to satisfy the VSC. A small, but realistic, 6-bus test system is used to analyze the performance of the proposed technique, and to compare it with a ldquostandardrdquo Security-Constrained OPF. The results demonstrate the advantages and practical feasibility of the proposed VSC-OPF technique.