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A Frequency Adaptive Scheme Based on Newton Structure of PRRC for LCL-Type Inverter Connected with Weak Grid

Author

Listed:
  • Chengbi Zeng

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Sudan Li

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Hanwen Wang

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Hong Miao

    (College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

Abstract

Repetitive control (RC) is gradually used in inverters tied with weak grid. To achieve the zero steady-state error tracking of inverter current and compensate the harmonic distortion caused by frequency fluctuation, a frequency adaptive (FA) control scheme for LCL-type inverter connected with weak grid is proposed. This scheme adopts a proportional resonance (PR) controller in parallel with RC (PRRC) to overcome the disadvantages caused by RC inherent one-cycle time delay. A fractional delay (FD) filter based on the Newton structure is proposed to approximate the fraction item of f s / f , where f s and f are sample frequency and grid frequency, respectively. The structure of the proposed FD filter is relatively simple; moreover, coefficients of the filter maintain constant so as not to need online tuning even when grid frequency fluctuates, which decreases the computational burden considerably. The feasibility and effectiveness of the proposed FA control scheme, named as Newton-FAPRRC, are all verified by the simulation and experimental results.

Suggested Citation

  • Chengbi Zeng & Sudan Li & Hanwen Wang & Hong Miao, 2021. "A Frequency Adaptive Scheme Based on Newton Structure of PRRC for LCL-Type Inverter Connected with Weak Grid," Energies, MDPI, vol. 14(14), pages 1-18, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4225-:d:593541
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    References listed on IDEAS

    as
    1. Felipe J. Zimann & Eduardo V. Stangler & Francisco A. S. Neves & Alessandro L. Batschauer & Marcello Mezaroba, 2020. "Coordinated Control of Active and Reactive Power Compensation for Voltage Regulation with Enhanced Disturbance Rejection Using Repetitive Vector-Control," Energies, MDPI, vol. 13(11), pages 1-18, June.
    2. Wei Jin & Yongli Li & Guangyu Sun & Lizhi Bu, 2017. "H∞ Repetitive Control Based on Active Damping with Reduced Computation Delay for LCL-Type Grid-Connected Inverters," Energies, MDPI, vol. 10(5), pages 1-19, April.
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    Cited by:

    1. Tila Muhammad & Adnan Umar Khan & Muhammad Tajammal Chughtai & Reyyan Ahmad Khan & Yousra Abid & Muhammad Islam & Sheroz Khan, 2022. "An Adaptive Hybrid Control of Grid Tied Inverter for the Reduction of Total Harmonic Distortion and Improvement of Robustness against Grid Impedance Variation," Energies, MDPI, vol. 15(13), pages 1-21, June.
    2. Marek Nowak & Tomasz Binkowski & Stanisław Piróg, 2021. "Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters," Energies, MDPI, vol. 14(20), pages 1-17, October.

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