Tanwani, Naresh Kumar Supervisor Prof. Dr. Muhammad Usman Keerio creator Deparment of Electrical Engineering text Nawabshsh QUEST 2013 monographic 75p. ABSTRACT Maintaining synchronism between different parts of power system is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state and transient stabilities along with swing equation and numerical solution using MATLAB I Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system. In the second step, a transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understand ing of the transient and dynamic analysis of PS stabilities. In the second step, the proposed methodology of the power system stability with steady state (including transient and dynamic analysis) - the application to sudden increase in power input, and the application of three-phase fault have been examined using Matlab coding (m-files) along with simulation models (Simulin.k). This makes power system stability studies easier to understand. The study gives good understanding of maintaining reliable position of the system and new design of generating and transmitting plants. It provides information of relaying system and critical clearing time of circuit breakers, voltage levels and transfer capabilities between Systems. Use of MATLAB/SJMULINK for the purpose, provides supplement for implementing numerical solution in the field of power system and its students, engineers and researchers. https://tinyurl.com/mrnv72sc https://tinyurl.com/mrnv72sc