Power system contingency ranking using Newton Raphson load flow method

The Power system security is one of the significant aspects, where the proper action needs to be taken by the operational engineers for the unseen contingency. Therefore the contingency analysis is key for the power system security. The 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. The ranking is given by considering the overall performance index, which is the summation of Active power and voltage performance index. The proposed method is tested on a standard-5 bus system.