Power systems have increased in size and complexity, and national society depends heavily upon a high level of power system reliability. When the bulk transmission system is subjected to large disturbances, there is the possibility of a system wide blackout due to cascading outages. After a partial blackout or system breakdown condition, restoring power system is needed and then power needs to be restored as quickly, stably and reliably as possible and consequent. Outage time after extensive blackouts depends very much on the power system restoration process. Power system restoration is a very challenging task for the operator since the situation differs from normal conditions. This book focuses on a simulation-based tool MATLAB/SIMULINK that determines the most suitable restoration transmission lines route for 31 Bus of Myanmar Power System (MPS).