International Journal of Power Electronics and Drive Systems (IJPEDS) Vol. 13, No. 4, December 2022, pp. 2296~2304 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v13.i4.pp2296-2304  2296 Journal homepage: http://ijpeds.iaescore.com Impact of static synchronous compensator STATCOM installation in power quality improvement Ismail Moufid, Zineb En-nay, Soukaina Naciri, Hassan El Moussaoui, Tijani Lamhamdi, Hassane El Markhi Intelligent Systems, Geo-resources and Renewable Energies laboratory (ISGREL), Faculty of Science and Technology, Sidi Mohamed Ben Abdelah University, Fez, Morocco Article Info ABSTRACT Article history: Received Mar 18, 2022 Revised Jun 28, 2022 Accepted Jul 20, 2022 The present work investigates the flexible AC transmission system (FACTS) device's role to improve the voltage stability for a distribution network of various types of loads. Our analysis was based on using a static synchronous compensator (STATCOM) device over a test distribution system. Firstly, a detailed description of the mathematical model used in our system is presented. Then we studied the effect of inductive and capacitive loads with and without STATCOM. To investigate the efficacy and robustness of using STATCOM in a distribution network, a test system is developed using MATLAB/Simulink, where we analyzed the voltage profile in different cases. The results of the simulation demonstrate that the STATCOM plays a critical role in optimizing the voltage profiles of distribution systems, either capacitive or inductive. Keywords: FACT device MATLAB/Simulink Point of common coupling STATCOM Voltage profile This is an open access article under the CC BY-SA license. Corresponding Author: Ismail Moufid Intelligent Systems, Geo-resources and Renewable Energies laboratory (ISGREL) Faculty of Science and Technology, Sidi Mohamed Ben Abdelah University Fez, 2202, Morocco Email: ismail.moufid@usmba.ac.ma 1. INTRODUCTION The increased demand for electricity makes transmission management and distribution networks more complicated. Voltage stability has been more critical in industrial power distribution systems than residential utilities. It is even more severe nowadays with advanced networks with heavier loads and the recent integration of intermittent energy sources in the grid [1], [2]. Voltage instability may result in power system destruction [3]. Thus, solving the voltage stability problems has been the theme of exhaustive explorations for years [4], [5]. Generally, voltage stability can be defined as the stability of the power system by keeping constant voltages at all buses of the power system after being disturbed by different power devices. Fast load voltage regulation is necessary for a power distribution system to minimize time-varying loads such as variable wind generation output power, voltage drop, electric arc furnaces, and current consumption of parallel-connected loads recently started induction motors [6]. Improved system voltage stability necessitates reactive power control [7]. As a result, distribution systems require voltage regulation to keep the voltage profile of all system busses within acceptable limits, ensuring the power system's stability. To increase the operation of the electrical grid, new control systems are required to meet these challenges and needs [8]. Due to their agility and adaptability, the integration of flexible AC transmission system (FACTS) control systems in power systems such as static synchronous compensator (STATCOM) and static VAR compensator (SVC) contribute significantly to enhancing power transfer capability and providing system stability. FACTS devices can also control the reactive and active power flow in the electrical power system autonomously [9]. One of the FACTS