International Journal of Engineering and Information Systems (IJEAIS)   Year: 2019 | Volume: 3 | Issue: 2 | Page No.: 1-8 Remedies Scheme for Single and Multiple Severe Contingencies of Transmission System Ahmed R. Abul'Wafa, Aboul'Fotouh El'Garably, Shazly N. Fahmy Ahmed Abstract: Abstract-An important factor in the power system planning/operation is the desire to maintain system security by examining the system performance in post contingency cases. The purpose of this paper is to study the effect of contingencies in terms of its severity to select and rank all severe contingencies and processing them into a secure operating state using a Remedial Action Scheme (RAS). All severe contingencies are selected and ranked based on the Overall Performance Index (OPI) of test system considering Voltage Performance Index (PIV) and Active Power Performance Index (PIP) for each severe contingency case. This paper underlines the necessity of considering a remedies scheme in all severe contingencies to reach the test system configurations for secure operation following all contingencies. This work is implemented on IEEE 14 bus system in Digsilent software.