International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 05 | May 2025
p-ISSN: 2395-0072
www.irjet.net
Power Quality Improvement by SCCS Using SRF and Park Transformation in PV Grid Integration Systems Godugu Gowthami1 Golla Koti Haritha2,
l
1B.Tech Student, Electrical and Electronics Engineering, Stanley College of Engineering and Technology for
Women, Telangana, India
2B.Tech Student, Electrical and Electronics Engineering, Stanley College of Engineering and Technology for
Women, Telangana, India
3Assistant professor, Electrical and Electronics Engineering, Stanley College of Engineering and Technology for
Women, Telangana, India ---------------------------------------------------------------------***--------------------------------------------------------------------the combination of SRF and Park transformation methods with the Synchronous Current Control Strategy (SCCS) [5]. The SCCS method regulates the electricity that is fed into the grid, ensuring optimal power quality and stability. Additionally, the Second-Order Generalized Integrator (SOGI) based Phase-Locked Loop (PLL) is employed for precise detection of the utility voltage's phase angle, amplitude, and frequency [6]. This project aims to demonstrate the effectiveness of the proposed approach through simulation and experimental validation [7]. By integrating advanced control techniques, the project seeks to improve PV systems performance, ensuring reliable and efficient integration into the electrical grid.
Abstract - The increasing penetration of renewable
energy sources, particularly photovoltaic (PV) systems, into the grid has raised concerns about power quality and reliability. This paper presents a comprehensive analysis and evaluation of power quality enhancement in PV integrated systems using a Unified Power Quality Conditioner (UPQC) with Synchronous Reference Frame (SRF) and Park transformation control strategies. The performance of UPQC with SRF and Park transformation with and without Sinusoidal current control strategies (SCCS), under various non-linear load conditions. The primary objective is to reduce harmonics, sags, swells, and voltage fluctuations, thereby enhancing power quality. The analysis utilizes MATLAB/Simulink software for simulation and comparison of Total harmonic distortion (THD). The results provide valuable insights into the effectiveness of UPQC with SRF and Park transformation for power quality improvement in PV integrated systems.
1.1 UNIFIED POWER QUALITY CONDITIONER (UPQC) A device known as a UPQC (Unified Power Quality conditioner) is used to correct for voltage distortion and imbalance in a power system. This ensures that the voltage at the load side is perfectly balanced, sinusoidal, and regulated [8]. Additionally, it corrects for load current harmonics, resulting in a source side current that is perfectly sinusoidal and free of distortions and harmonics. Shunt Active Power Filter (ShAPF) is used to compensate for load current harmonics and make the source current fully sinusoidal, free from distortions and harmonics [9]. UPQC is a combination of a Shunt Active Power Filter and a Series Active Power Filter [10]. The Shunt APF is connected in parallel to the transmission line. APF is connected in series with transmission lines [11].Passive filters used to be employed to compensate for harmonics and voltage distortion, but they are no longer used because of their numerous drawbacks [12].
Key Words: Power Quality, UPQC, SRF, Park Transformation, SCCS, PV Integrated System and THD.
1.INTRODUCTION The Deployment of photovoltaic (PV) systems has increased significantly globally as a result of the growing need for renewable energy. These systems are essential to the shift to sustainable energy sources because of their capacity to directly convert sunlight into power [1]. However, there are a number of difficulties in integrating PV systems into the electrical grid, especially when it comes to preserving grid stability and power quality [2]. To overcome these obstacles and improve PV system performance, a number of control solutions have been developed recently. The SRF and Park transformation techniques are two of these tactics that have become wellknown because of how well they ease three-phase system control and analysis [3]. These techniques enable precise control and grid synchronization by transforming threephase currents and voltages into a two-phase synchronous reference frame. To further improve the current and voltage parameters of PV systems, this project proposes
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The parallel PWM converter is a controlled current source (ShAF), whereas the UPQC is a controlled voltage source (SAF) [13]. A tiny DC capacitor serves as a tiny energystoring component, and the DC link is independent of the power source. When there is a line failure brought on by an excessive demand for reactive power or a voltage dip in the grid, the Fixed Speed Induction Generator
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