Estimation of sensitive node for IEEE-30 bus system by load variation

In deregulated power systems, the issue of voltage stability causes major blackouts. This result in collapse of transmission system and is mostly affected due to frequent variations in load. In this paper, we will focus on the determination of most sensitive node in IEEE - 30 bus system. For this study, we are using PSAT, a MATLAB Based Simulink & Simulation toolbox which utilizes L-index method for voltage stability analysis and sensitive nodes determination. For the evaluation of sensitive node we have analyzed IEEE-30 bus system under the standard test data and then subjected to increase in load data by 5%, 10% and so on up to 40%. And then all the results are compared with the original power flow results of IEEE-30 bus system for determining a most sensitive node.