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A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters

Author

Listed:
  • Ningyun Zhang

    (School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Minhang District, Shanghai 200240, China)

  • Houjun Tang

    (School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Minhang District, Shanghai 200240, China)

  • Chen Yao

    (School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Minhang District, Shanghai 200240, China)

Abstract

The Proportional Resonant (PR) current controller provides gains at a certain frequency (resonant frequency) and eliminates steady state errors. Therefore, the PR controller can be successfully applied to single grid-connected PV inverter current control. On the contrary, a PI controller has steady-state errors and limited disturbance rejection capability. Compared with the L- and LC filters, the LCL filter has excellent harmonic suppression capability, but the inherent resonant peak of the LCL filter may introduce instability in the whole system. Therefore, damping must be introduced to improve the control of the system. Considering the controller and the LCL filter active damping as a whole system makes the controller design method more complex. In fact, their frequency responses may affect each other. The traditional trial-and-error procedure is too time-consuming and the design process is inefficient. This paper provides a detailed analysis of the frequency response influence between the PR controller and the LCL filter regarded as a whole system. In addition, the paper presents a systematic method for designing controller parameters and the capacitor current feedback coefficient factor of LCL filter active-damping. The new method relies on meeting the stable margins of the system. Moreover, the paper also clarifies the impact of the grid on the inverter output current. Numerical simulation and a 3 kW laboratory setup assessed the feasibility and effectiveness of the proposed method.

Suggested Citation

  • Ningyun Zhang & Houjun Tang & Chen Yao, 2014. "A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters," Energies, MDPI, vol. 7(6), pages 1-21, June.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:6:p:3934-3954:d:37425
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    Cited by:

    1. Meenakshi Jayaraman & Sreedevi VT, 2017. "Power Quality Improvement in a Cascaded Multilevel Inverter Interfaced Grid Connected System Using a Modified Inductive–Capacitive–Inductive Filter with Reduced Power Loss and Improved Harmonic Attenu," Energies, MDPI, vol. 10(11), pages 1-23, November.
    2. Yassir El Karkri & Alexis B. Rey-Boué & Hassan El Moussaoui & Johannes Stöckl & Thomas I. Strasser, 2019. "Improved Control of Grid-connected DFIG-based Wind Turbine using Proportional-Resonant Regulators during Unbalanced Grid," Energies, MDPI, vol. 12(21), pages 1-21, October.
    3. Milovan Majstorovic & Marco Rivera & Leposava Ristic & Patrick Wheeler, 2021. "Comparative Study of Classical and MPC Control for Single-Phase MMC Based on V-HIL Simulations," Energies, MDPI, vol. 14(11), pages 1-17, May.
    4. Xingang Fu & Shuhui Li, 2016. "A Novel Neural Network Vector Control for Single-Phase Grid-Connected Converters with L, LC and LCL Filters," Energies, MDPI, vol. 9(5), pages 1-19, April.
    5. Mostafa Ahmed & Ibrahim Harbi & Ralph Kennel & José Rodríguez & Mohamed Abdelrahem, 2022. "Evaluation of the Main Control Strategies for Grid-Connected PV Systems," Sustainability, MDPI, vol. 14(18), pages 1-20, September.
    6. Botong Li & Jianfei Jia & Shimin Xue, 2016. "Study on the Current-Limiting-Capable Control Strategy for Grid-Connected Three-Phase Four-Leg Inverter in Low-Voltage Network," Energies, MDPI, vol. 9(9), pages 1-18, September.
    7. Jura Arkhangelski & Pedro Roncero-Sánchez & Mahamadou Abdou-Tankari & Javier Vázquez & Gilles Lefebvre, 2019. "Control and Restrictions of a Hybrid Renewable Energy System Connected to the Grid: A Battery and Supercapacitor Storage Case," Energies, MDPI, vol. 12(14), pages 1-23, July.
    8. Hani Albalawi & Sherif Ahmed Zaid, 2018. "An H5 Transformerless Inverter for Grid Connected PV Systems with Improved Utilization Factor and a Simple Maximum Power Point Algorithm," Energies, MDPI, vol. 11(11), pages 1-17, October.
    9. Hemakesavulu Oruganti & Subranshu Sekhar Dash & Chellammal Nallaperumal & Sridhar Ramasamy, 2018. "A Proportional Resonant Controller for Suppressing Resonance in Grid Tied Multilevel Inverter," Energies, MDPI, vol. 11(5), pages 1-15, April.
    10. Bingzhang Li & Shenghua Huang & Xi Chen, 2017. "Performance Improvement for Two-Stage Single-Phase Grid-Connected Converters Using a Fast DC Bus Control Scheme and a Novel Synchronous Frame Current Controller," Energies, MDPI, vol. 10(3), pages 1-30, March.
    11. Mohamed A. Hassan & Muhammed Y. Worku & Mohamed A. Abido, 2019. "Optimal Power Control of Inverter-Based Distributed Generations in Grid-Connected Microgrid," Sustainability, MDPI, vol. 11(20), pages 1-27, October.
    12. Shiying Zhou & Xudong Zou & Donghai Zhu & Li Tong & Yong Kang, 2017. "Improved Capacitor Voltage Feedforward for Three-Phase LCL-Type Grid-Connected Converter to Suppress Start-Up Inrush Current," Energies, MDPI, vol. 10(5), pages 1-19, May.
    13. Zhun Meng & Yi-Feng Wang & Liang Yang & Wei Li, 2017. "Analysis of Power Loss and Improved Simulation Method of a High Frequency Dual-Buck Full-Bridge Inverter," Energies, MDPI, vol. 10(3), pages 1-18, March.
    14. Zaid, S.A. & Kassem, Ahmed M., 2017. "Review, analysis and improving the utilization factor of a PV-grid connected system via HERIC transformerless approach," Renewable and Sustainable Energy Reviews, Elsevier, vol. 73(C), pages 1061-1069.
    15. Jose Miguel Espi & Rafael Garcia-Gil & Jaime Castello, 2017. "Capacitive Emulation for LCL-Filtered Grid-Connected Converters," Energies, MDPI, vol. 10(7), pages 1-15, July.
    16. Silpa Baburajan & Haoran Wang & Dinesh Kumar & Qian Wang & Frede Blaabjerg, 2021. "DC-Link Current Harmonic Mitigation via Phase-Shifting of Carrier Waves in Paralleled Inverter Systems," Energies, MDPI, vol. 14(14), pages 1-17, July.
    17. Weiyi Zhang & Daniel Remon & Antoni M. Cantarellas & Pedro Rodriguez, 2016. "A Unified Current Loop Tuning Approach for Grid-Connected Photovoltaic Inverters," Energies, MDPI, vol. 9(9), pages 1-19, September.
    18. Jingrong Yu & Limin Deng & Dongran Song & Maolin Pei, 2019. "Wide Bandwidth Control for Multi-Parallel Grid-Connected Inverters with Harmonic Compensation," Energies, MDPI, vol. 12(3), pages 1-22, February.
    19. Zhun Meng & Yi-Feng Wang & Liang Yang & Wei Li, 2017. "High Frequency Dual-Buck Full-Bridge Inverter Utilizing a Dual-Core MCU and Parallel Algorithm for Renewable Energy Applications," Energies, MDPI, vol. 10(3), pages 1-18, March.
    20. Ling Yang & Yandong Chen & An Luo & Kunshan Huai, 2019. "Admittance Reshaping Control Methods to Mitigate the Interactions between Inverters and Grid," Energies, MDPI, vol. 12(13), pages 1-18, June.

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