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Grid-Connected Renewable Energy Sources: A New Approach for Phase-Locked Loop with DC-Offset Removal

Author

Listed:
  • Mohammad A. Bany Issa

    (TECH-NASE Research Group, Department of Chemical Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain)

  • Zaid A. Al Muala

    (TECH-NASE Research Group, Department of Chemical Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain)

  • Pastora M. Bello Bugallo

    (TECH-NASE Research Group, Department of Chemical Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain)

Abstract

Renewable Energy Sources (RES) are widely used worldwide due to their positive effect on the environment, being sustainable, low cost, and controllable. The power generated from RESs must be configured to interface and perfectly synchronize with the grid by using Power Electronics Converters (PEC). A Phase-Locked Loop (PLL) is one of the most popular synchronization techniques used due to its speed and robustness. A growing issue that results in oscillations in the estimated fundamental grid phase, frequency, and voltage amplitude is the DC-offset in the input of the PLL. This study was developed to eliminate the DC-offset in the single-phase grid synchronization using Delay Signal Cancellation (DSC) and a fixed-length Transfer Delay (TD)-based PLL. Then, the small-signal model, stability analysis, and selection of controller gains were discussed. The proposed PLL was simulated using MATLAB/Simulink. Moreover, to evaluate the proposed method, several scenarios were developed in order to compare it with other powerful PLLs in terms of performance indicators such as settling time, frequency, and phase error. As a result, the proposed PLL has the fastest dynamic response, completely rejects the DC-offset effect, and fully synchronizes with the electrical grid.

Suggested Citation

  • Mohammad A. Bany Issa & Zaid A. Al Muala & Pastora M. Bello Bugallo, 2023. "Grid-Connected Renewable Energy Sources: A New Approach for Phase-Locked Loop with DC-Offset Removal," Sustainability, MDPI, vol. 15(12), pages 1-17, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:12:p:9550-:d:1170792
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    References listed on IDEAS

    as
    1. Issam A. Smadi & Ibrahem E. Atawi & Ammar A. Ibrahim, 2023. "An Improved Delayed Signal Cancelation for Three-Phase Grid Synchronization with DC Offset Immunity," Energies, MDPI, vol. 16(6), pages 1-15, March.
    2. Heng Du & Qiuye Sun & Qifu Cheng & Dazhong Ma & Xu Wang, 2019. "An Adaptive Frequency Phase-Locked Loop Based on a Third Order Generalized Integrator," Energies, MDPI, vol. 12(2), pages 1-20, January.
    3. Yijia Cao & Jiaqi Yu & Yong Xu & Yong Li & Jingrong Yu, 2017. "An Efficient Phase-Locked Loop for Distorted Three-Phase Systems," Energies, MDPI, vol. 10(3), pages 1-16, February.
    4. Djordje Stojic & Tomasz Tarczewski & Lukasz J. Niewiara & Lech M. Grzesiak, 2022. "Improved Fixed-Frequency SOGI Based Single-Phase PLL," Energies, MDPI, vol. 15(19), pages 1-15, October.
    5. Mostafa A. Hamood & Ognjen Marjanovic & Joaquin Carrasco, 2021. "Adaptive Impedance-Conditioned Phase-Locked Loop for the VSC Converter Connected to Weak Grid," Energies, MDPI, vol. 14(19), pages 1-24, September.
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