Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol. 10, No. 2, June 2022, pp. 317~332 ISSN: 2089-3272, DOI: 10.52549/ijeei.v10i2.3630  317 Journal homepage: http://section.iaesonline.com/index.php/IJEEI/index Study and Analysis of Power System Stability Based on FACT Controller System Yousif Al Mashhadany 1 , Ahmed K. Abbas 2 , Sameer Algburi 3 1 Department of Electrical Engineering, College of Engineering, University of Anbar, Iraq 2 Department of Construction and Projects, University Headquarter, University of Anbar, Ramadi, Iraq 3 Al-Kitab University, College of Engineering Technology, Iraq Article Info ABSTRACT Article history: Received Jan 1, 2022 Revised May 16, 202 Accepted Jun 3, 2022 Energy framework soundness is identified with standards rotational movement and the swing condition administering electromechanical unique conduct. In the exceptional instance of two limited machines, the basis of equivalent territory security can be utilized to ascertain the basic clearing point in the force framework, It is important to look after synchronization, in any case the degree of administration for customers won't be accomplished. This term steadiness signifies "looking after synchronization." This paper is an audit of three kinds of consistent state. The main sort of adjustment, consistent state steadiness clarifies the most extreme consistent state quality and force point chart. The transient solidness clarifies the wavering condition and the idleness steady while dynamic soundness manages the transient security time frame. There are a few different ways to improve framework soundness a portion of the techniques are clarified. Versatile AC Transmission Frameworks (FACTS) Flexible AC Transmission System (FACTS) regulators have been utilized frequently to comprehend the different issues of a non-variable force structure. Versatile AC Transmission Frames or FACTS are devices that permit versatile and dynamic control of intensity outlines. Improving casing respectability has been explored with FACTS regulators. This examination focuses to the upsides of utilizing FACTS apparatuses with the explanation behind improving electric force tire activity. There has been discussion of an execution check for different FACTS regulators. Keywords: Steady State Response; Transient Control Processing, Power System Stability FACTS. Copyright © 2022 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Ahmed Khudhair Abbas, Department of Construction and Projects, University Of Anbar, Ramadi, Iraq Email: ahmed89at@uoanbar.edu.iq 1. INTRODUCTION The The stabilization of the energy system is described as "the power system's ability to recover a state of operational stabilization after physical disruption for a given initial working conditions, With most device parameters bound such that the whole system stays virtually intact"[1]. According to the aforementioned description, if the device does not attain operational harmony, it is obvious that it is deemed instable. Power intake has elevated appreciably over the preceding decades, however, the improvement of electricity technology and transmission has been significantly curtailed because of the loss of sources in addition to environmental restrictions. As a result, positive transmission traces are excessively laden, and gadget balance will become a proscribing element in electricity transfer. So the reliability of the electricity gadget is turning into a key difficulty for operators, particularly the highly loaded energy systems with a shortage of reactive power. Power instability is a significant challenge to the safety, performance and reliability of power systems [2]. The power sources have become much more advanced and complicated because of varied sources of generation and distribution without altering or adding, in certain cases, forces the device to work in severe overstressed. Furthermore, the necessity of reactive capacity is becoming difficult to satisfy as well as to preserve the bus voltage is kept under acceptable limits[7].To greatly increase performance, power plant operators are coercive to step away from of the (traditional/conventional) paradigm of centralized energy sources, De-centralized far less controlled processes transmissions and distributions. This world propensity to