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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