STEADY STATE STABILITY ANALYSIS AND ENHANCEMENT OF THREE MACHINE NINE BUS POWER SYSTEM USING TCPS FACTS DEVICE

Divya Rishi Shrivastava, Daneshwari R Akkishetti

Abstract: Power System stability study is the important parameter of economic, reliable and secure system planning and operation. Studies are important during the planning and conceptual design stages of the project as well as during the operating life of the plant periodically. This paper presents the power system steady state stability analysis for IEEE- 9 bus test system and examines influence of TCPS FACTS device based controller on test system. It is assumed that system under study has been perturbed from a steady state equilibrium that prevailed prior to the application of the disturbance. If system is stable, we would expect that for temporary or permanent disturbance, system will acquire initial or new operating state after a transient period. The stability study is accessed using Lyapunov’s first method. The effectiveness of damping controller in enhancing the steady state stability is investigated by incorporating available constraints. For analysis MATLAB software is employed. The conclusions have been drawn here, based on theoretical and mathematical analysis so as to provide an insight and better understanding of steady state stability of considered multi machine power system.

Keywords: Lyapunov’s first method, Steady-state stability, Phase portrait, FACTS device, supplementary modulation controller, eigen value, synchronizing power coefficient, IEEE-9 Bus Test System, Load Flow Study, Differential algebraic equation

DOI: https://doi.org/10.15623/ijret.2015.0412041