NONE 20260224121001734 wseas/wseas content-registration-form+ja@crossref.org content-registration-form WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL 1991-8763 2224-2856 Oluwafunso Oluwole Osaloni Department of Electrical and Computer Engineering, Afe Babalola University Ado Ekiti, Ekit State, NIGERIA Oliver Dzobo Department of Electrical and Computer Engineering, University of Johannesburg, SOUTH AFRICA The rising awareness of green energy has boosted the use of distributed storage and renewables in networks and microgrids. As a result, the rising use of power electronic devices has significantly contributed to declining power quality (PQ) in distribution networks. The photovoltaic (PV) integrated unified power quality conditioner (UPQC) presented in this paper operating using a flexible compensatory strategy built on the adjustable leaky least mean square (ALLMS) algorithm. This soft-computing approach attains faster convergence by updating parameters iteratively within defined bounds. The ALLMS-based algorithm generates UPQC control signals without needing low-pass filters to clean distorted voltages and currents. It corrects point of common coupling (PCC) current harmonics and low power factor, while maintaining network and PV power balance via the shunt VSC’s feed-forward compensation. It also regulates the DC-link voltage, while the series converter maintains a pure sinusoidal load voltage despite grid sags, swells, or harmonics. 02 24 2026 02 24 2026 9 2 https://creativecommons.org/licenses/by/4.0/deed.en_US 10.37394/23203.2026.21.2 https://wseas.com/journals/sac/2026/a045103-1384.pdf K. Srilakshmi et al., “Optimal design of solar/wind/battery and EV fed UPQC for power quality and power flow management using enhanced most valuable player algorithm,” Front. Energy Res., vol. 11, p. 134-145, 2024. C.U. Eya, A.O. Salau, S.L. Braide, S.B. Goyal, V.A. Owoeye, and O. O. Osaloni, “Assessment of Total Harmonic Distortion in Buck-Boost DC-AC Converters using Triangular Wave and Saw-Tooth based Unipolar Modulation Schemes”. WSEAS Transactions on Power Systems, vol.17, P 324-338, 2022, https://doi.org/10.37394/232016.2022.17.33. O.S. Agunbiade, M.O. Onibonoje, O.O. Osaloni, “Techniques for optimal sizing and placement of renewable energy generators in power distribution grid: A review,” AIP Conf. Proc. 3169, Brazil (2025). S. K. Yadav, K. B. Yadav, and A. Priyadarshi, “Performance analysis of three-phase solar PV, BESS, and Wind integrated UPQC for power quality improvement,” Computer. Electrical. Eng., vol. 116, p. 109-203, 2024. O. O. Osaloni and A. K. Saha, “Impact of Improved Unified Power Quality Conditioner Allocation in Radial Distribution Network,” Int. J. Eng. Res. Africa, vol. 59, pp. 135–150, 2022. O.O. Osaloni, A.S. Akinyemi, A.A. Adebiyi, And A. O. Salau, “An Effective Control Technique to Implement an IUPQC Design for Sensitive Loads in a Hybrid Solar PV-Grid Connection”. WSEAS Transactions on Power Systems, Vol. 18, P 26-38, 2023. https://doi.org/10.37394/232016.2023.18.4. D. R. Mani, S. Muthu, and K. Kasilingam, “Enhanced power quality and efficient photovoltaic integration with a PV-based unified power quality conditioner using optimized MPPT technique,” Electr. Eng. Journal, Vol. 30, pp. 1–22, 2024. D. Al-Baik and V. Khadkikar, “Effect of variable PV power on the grid power factor under different load conditions,” in 2011 2nd International Conference on Electric Power and Energy Conversion Systems (EPECS), Procal Canada Int. J. 2011, pp. 1–5. N. I. Nimalsiri et al., “A new energy management scheme for electric vehicles microgrids concerning demand response and reduced emission,” IEEE Access, vol. 10, no. 4, p. 114973, 2023. S. Devassy and B. Singh, “Design and Performance Analysis of Three-Phase Solar PV Integrated UPQC,” IEEE Trans. Ind. Appl., vol. 54, no. 1, pp. 73–81, Jan. 2018, doi: 10.1109/TIA.2017.2754983. R.T. Hock, Y.R. de Novaes, A.L. Batschauer, R.T. Hock, and Y.R. de Novaes, “A Voltage Regulator for Power Quality Improvement in Low-Voltage Distribution Grids,” ITPE, vol. 33, no. 3, pp. 2050–2060, Mar. 2018, doi: 10.1109/TPEL.2017.2693239. K. Sarita et al., “Power enhancement with grid stabilization of renewable energy-based generation system using UPQC-FLC-EVA technique,” IEEE Access, vol. 8, pp. 207443– 207464, 2020. A. Patel, S. K. Yadav, and H. D. Mathur, “Utilizing UPQC-DG to export reactive power to grid with power angle control method,” Electr. Power Syst. Res., vol. 209, p. 107944, 2022. P. K. Ray, P. S. Puhan, A. K. Das, D. Pradhan, and L. Meher, “Comparative Analysis of Different Control Techniques Implementation in UPQC for Power Quality Improvement,” in Sustainable Energy and Technological Advancements, Springer, 2022, pp. 147–161. N. C. S. Sarita, S. S. Reddy, and P. Sujatha, “Control strategies for power quality enrichment in Distribution network using UPQC,” Mater. Todayi Proc., vol. 80, pp. 2872– 2882, Japan 2023. T. Thenmozhi, M.V. S. Devi, and S. Kavitha, “Improvement of Power Quality Using PV with UPQC,” in 2022 8th International Conference on Smart Structures and Systems (ICSSS), 2022,pp.1–6. https://doi.org/10.1109/ICSSS54381.2022.978 2210. D.A. Fernandes, F.F. Costa, J.R.S. Martins, A.S. Lock, E.R.C. Da Silva, and M.A. Vitorino, “Sensitive Load Voltage Compensation Performed by a Suitable Control Method,” IEEE Trans. Ind. Appl., vol. 53, no. 5, pp. 4877–4885, Sep. 2017, doi: 10.1109/TIA.2017.2715173. A. Mahendru and R. K. Varma, “Reduction in System Losses and Power Demand by Combination of Optimal Power Flow and Conservation Voltage Reduction Using Smart PV Inverters,” IEEE Power Energy Soc. Gen. Meet., vol. 2019-August, Aug. 2019, https://doi.org/10.1109/PESGM40551.2019.8 973566. T. Ercan, O. Sedehi, L.S. Katafygiotis, and C. Papadimitriou, “Information theoretic-based optimal sensor placement for virtual sensing using augmented Kalman filtering,” Mech. Syst. Signal Process., vol. 188, p. 110031, 2023. K. Srilakshmi et al., “Simulation of grid/standalone solar energy supplied reduced switch converter with optimal fuzzy logic controller using golden Ball Algorithm,” Front. Energy Res., vol. 12, p. 137-140, 2024. R. K. Agarwal, I. Hussain, B. Singh, A. Chandra, and K. Al-Haddad, “Improved power quality of three-phase grid connected solar energy conversion system under grid voltages distortion and imbalances,” IEEE Ind. Appl. Soc. 52nd Annu. Meet. IAS 2016, Nov. 2016, https://doi.org/10.1109/IAS.2016.7731823. C. L. Babu and T. G. Manohar, “An Improved Power Quality in a Renewable Energy-based Microgrid System Using Flexible Hybrid UPQC Control Strategy,” Int. J. Exp. Res. Rev, vol. 36, pp. 217–231, 2023. R. Sharma and B. Singh, “Resilient control algorithm for wind-hydro based distributed generation system with grid synchronization capability,” IEEE Trans. Ind. Appl., vol. 59, no. 4, pp. 4687–4699, 2023. M. Seshu, P. K. Sundaram, and M. V. Ramesh, “A novel PQ improvement in multiparallel feeder distribution system using multi- convertible UPQC device,” Int. J. Appl., vol. 13, no. 2, pp. 382–395, 2024. L. B. Chilakapati and T. G. Manohar, “Control Strategies for Enhancing Power Quality with Unified Power Quality Conditioner in a Solar- PV Integrated Utility System,” Int. J. Exp. Res. Rev, vol. 35, pp. 1– 15, 2023. P. Ray, P. K. Ray, B. P. Behera, and N. Singh, “An ANF Cascaded Normalized-CF-SOHO Based Control Approach and Analysis of PVUPQC Under Highly Non-Ideal Grid and Load Conditions,” IEEE Trans. Ind. Appl., Vol. 16, P 770-785, 2024. K. Srilakshmi, K. Krishna Jyothi, G. Kalyani, and Y. Sai Prakash Goud, “Design of UPQC with solar PV and battery storage systems for power quality improvement,” Cybern Int,J. Syst., pp. 1–30, 2023. M. L. Duc, P. Bilik, and R. Martinek, “Enhancing Power Quality in Industry 4.0 Manufacturing Using the Multi-Criteria Selection Method,” IEEE Access, vol. 8, pp. 470– 477 2024. O.O. Osaloni, A.S. Akinyemi, A.A. Adebiyi, K. Moloi, A.O. Salau, “Optimal Power Quality Enhancement using a Radial Distribution System with an Improved Unified Power Quality Conditioner,” WSEAS Transactions on Power Systems, Vol. 18, pp.158-171. 2023. https://doi.org/10.37394/232016.2023.18.17. D. U. Achilihu, O. O. Osaloni, J. A. Akinwumi, “Load Frequency Control of a Hybrid Power System that Uses a Fuzzy Logic Controller Tuned by the Bees Algorithm,” IEEE International Conference on Emerging & Sustainable Technologies for Power & ICT in a Developing Society (NIGERCON), 1–5, ABUAD 2024. J. Dang, Y. Wang, R. Jia, X. Wang, and G. Cao, “Dual-layer loss reduction strategy for virtual distribution transformer integrating energy storage converter,” J. Energy Storage, vol. 90, p. 111889, 2024. O.S. Agunbiade, M.O. Onibonoje, O.O. Osaloni, “Techniques for optimal sizing and placement of renewable energy generators in power distribution grid: A review,” AIP Conf. Proc. 3169, 040129 Kenya (2025). M. G. Ayodeji, C. C. Ndubisi, K. N. Akang, A. A. Dyem, A. Daniel, O. O. Oluwafunso, E. O. Oluwalade, J. O. Dada, “Design and Construction of A 500-watt Iot Based Portable Solar Power Generating Station,” 2024 IEEE 5th International Conference on ElectroComputing Technologies for Humanity (NIGERCON). pp.25-31, South Africa 2024. O. O. Osaloni, O. T. Ibitoye, “Loss mitigation in distribution systems using power electronic transformers,” AIP Conf. Proc. 3169, 040086 2 Abuad (2025).