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Asian Journal of Water, Environment and Pollution. Vol. 22, No. 2 (2025), pp. 152-167.
                doi: 10.36922/ajwep.8393




                ORIGINAL RESEARCH ARTICLE

                  An enhanced renewable energy integration system with
                                      improved power system stability




                       Vemireddy Suryanarayana Reddy*  and Busireddy Hemanth Kumar

                     Department of Electrical and Electronics Engineering, School of Engineering, Mohan Babu University, Tirupati,
                                                         Andhra Pradesh, India
                        (This article belongs to the Special Issue: Renewable Energy Systems and Strategies in Smart Grids and
                                                       Smart Cities Development)
                              *Corresponding author: Vemireddy Suryanarayana Reddy (Vemireddysnr@gmail.com)


                  Received: January 3, 2025; 1st revised: February 26, 2025; 2nd revised: March 22, 2025; Accepted: March 24, 2025;
                                                     Published online: April 17, 2025




                     Abstract: The utilization of renewable energy sources for energy transition is gaining significant popularity due
                     to pollution control and other environmental benefits. To move toward green energy generation, the integration
                     of renewable energy sources with the existing conventional grid plays a key role. The performance of a modern
                     interconnected power system, particularly with a high penetration of renewable energy sources, is significantly
                     impacted  by power system oscillations.  Flexible  Alternating  Current  Transmission System (FACTS) devices
                     are recommended to improve control framework performance, and the power system stabilizer is the customary
                     controller for damping such oscillations. FACTS offer a powerful strategy as they can control transport voltage,
                     transmission line impedance, and power flows. This paper presents an efficient control scheme that combines four
                     FACTS controllers: the static VAR compensator for controlling reactive power in control frameworks, the unified
                     power flow controller for managing active and reactive power flows on transmission lines, the static synchronous
                     compensator for maintaining system voltage stability, and the static synchronous series compensator for controlling
                     transmission line impedance. To address the challenges posed by the variability of renewable energy sources such
                     as wind and solar, the ant colony optimization algorithm is employed to optimally tune the controllers’ parameters.
                     By generating controlled  voltage  and interfacing  with the transmission line, these controllers  enhance  system
                     stability, even under fluctuating renewable energy inputs. The IEEE 30-Bus system was used for simulation and
                     control design, demonstrating the effectiveness of this approach in damping inter-area oscillations and improving
                     the stability and resilience of a renewable-energy-integrated power system.

                     Keywords: Renewable energy sources; Pollution control; Integration of renewable energy; Ant colony optimization
                     algorithm; Power stability


                1. Introduction                                     systems, especially  stability concerns.  The growing
                                                                    demand  for electric  energy has caused substantial
                The rise in energy consumption, the expansion of    difficulties  in  the  way  of  transmission  lines,  and  the
                industry, and the connectivity of large systems with   capacity of these lines cannot be expanded simply by
                numerous producing units have all contributed to the   adding more generating facilities or transmission lines.
                                                                                                                   1,2
                emergence of challenges  in the functioning  of power   A power system’s stability and proper functioning are



                Volume 22 Issue 2 (2025)                       152                                 doi: 10.36922/ajwep.8393
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