Contingency ranking of power systems using a performance index

analysis are important tasks in modern energy management systems. Contingency ranking using the performance index is a method for the line outages in a power system, which ranks the highest performance index line first and proceeds in a descending manner based on the calculated PI for all the line outages. This helps to take the prior action to keep the system secure. In the present work the Newton Raphson load flow method is used for the power system contingency ranking for the line outage based on the Active power and Voltage performance index.