Transient Stability Study of a Reality 500kV Power System Using Statcom

Abstract

Many of papers refers to study of application for Flexible Alternative Current transmission Systems (FACTS). Especially for using reactive compensators for 500kV power system in order to increase the static voltage stability margin and transient stability enhancement have considered. This paper presents a simulation model of the Static Synchronous Compensator (STATCOM) is developed to study its dynamic characteristics. The developed STATCOM is connected at the Point of Common Coupling (PCC) of the Doubly Fed Induction Generator (DFIG) wind turbine system connected to the weak distribution grid for steady state and dynamic voltage regulation purpose. The purpose of this paper is to solve the above problems in order to suggest a solution of the appropriate shunt compensator for a reality 500KV power system. Simulation results have shown that STATCOM helps to keep the steady state terminal voltage of the DFIG system to its rated voltage during the entire operation region of the DFIG. STATCOM maintains the fast voltage regulation (or voltage restoration) at the PCC during step change in reactive load causing voltage swelling or sagging. STATCOM does this by dynamically exchanging the reactive power with the power grid. The results of this work are of certain practical significance and applicable value.