Network contingency ranking using analytic hierarchy process to calculate unequal importance factors for static severity indices
Sanjukta Malakar, Manoj Kumar Maharana · Michael Faraday IET International Summit 2015 · 2015
Network contingency analysis for power system operation, is considered as the most vital concern of its security appraisal. Present days, on-line security assessment is carried out by contingency ranking, with the help of various computing techniques. One of the iterative methods is Newton Raphson power flow method for obtaining the magnitudes of different parameters. The aim of contingency ranking is to create a short list of possible potential threats quickly and rank them according to their severity in an accurate manner. A static security assessment dependent approach is presented in this paper for contingency ranking, incorporating analytic hierarchy process as an improvement to the conventional power flow based ranking techniques. The proposed method is employed to choose proper unequal importance factors for the weighted severity index. The usefulness of the technique has been verified on IEEE 14 bus system and the results are presented with a detailed comparison, with the help of Network Graphical Overlays for pre and post-contingent states of power system.