An Improved Active–Reactive Power Control Scheme for Single-Phase PV Inverters in Grid-Connected Systems
Nur Fairuz MOHAMED YUSOF, Dahaman ISHAK, Samir EL-NAKLA, Muhammad Hafeez Mohamed HARIRI
Abstract. This paper proposes an enhanced control strategy for single-phase inverter grid-connected photovoltaic (PV) systems that improves the synchronization accuracy, power quality, and control performance under fluctuating solar irradiance. The proposed system integrates a variable step size Incremental Conductance (VS-InCond) algorithm for Maximum Power Point Tracking (MPPT), a Double-Band Hysteresis Current Control (DBHCC) scheme for precise current regulation, and a modified PQ theory to achieve Phase-Locked Loop (PLL) free for grid synchronization. This coordinated control framework facilitates bidirectional active and reactive power flow while maintaining a near unity power factor. The proposed inverter performance complies with IEEE 1547-2018 and IEEE 519-2014 standards, keeping the Total Harmonics Distortion (THD) output below 5%. Simulation testing on a 9.6 kW PV system under various irradiance levels (1000 W/m², 600 W/m², and 350 W/m²) at 25 °C demonstrates that the proposed method achieves high conversion efficiency 99% (Mode 2), superior harmonic suppression, and fast dynamic response during inductive load compared to the PR controller.
Keywords
Grid-Connected Photovoltaic System, Single-Phase Inverter, Active and Reactive Power Control, Improved Control Strategy, Power Quality Enhancement
Published online 4/25/2026, 8 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Nur Fairuz MOHAMED YUSOF, Dahaman ISHAK, Samir EL-NAKLA, Muhammad Hafeez Mohamed HARIRI, An Improved Active–Reactive Power Control Scheme for Single-Phase PV Inverters in Grid-Connected Systems, Materials Research Proceedings, Vol. 64, pp 276-283, 2026
DOI: https://doi.org/10.21741/9781644904091-34
The article was published as article 34 of the book Energy Futures
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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