Voltage magnitude contingency ranking: bounded network approach

Abstract

Contingency ranking and selection is one of the major tools for static security analysis. Several performance indices suffer either from misranking or computational inefficiencies. This paper presents a new computational method for voltage magnitude selection and ranking. The proposed bounded network approach formulates a line outage as a local nonlinear constrained optimization problem. Optimization is used as a feedback to correct the errors resulting from linearized equations. The method provides more accurate calculation of post-outage load bus voltage magnitudes with less computational effort. The method is applied to IEEE test systems and the results are compared with those obtained using the full power flow.