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A Communication-Free Decentralized Control for Grid-Connected Cascaded PV Inverters

Author

Listed:
  • Mei Su

    (School of Information Science and Engineering, Central South University, Changsha 410083, China)

  • Chao Luo

    (School of Information Science and Engineering, Central South University, Changsha 410083, China)

  • Xiaochao Hou

    (School of Information Science and Engineering, Central South University, Changsha 410083, China)

  • Wenbin Yuan

    (School of Information Science and Engineering, Central South University, Changsha 410083, China)

  • Zhangjie Liu

    (School of Information Science and Engineering, Central South University, Changsha 410083, China)

  • Hua Han

    (School of Information Science and Engineering, Central South University, Changsha 410083, China)

  • Josep M. Guerrero

    (Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark)

Abstract

This paper proposes a communication-free decentralized control for grid-connected cascaded PV inverter systems. The cascaded PV inverter system is an AC-stacked architecture, which promotes the integration of low voltage (LV) distributed photovoltaic (PV) generators into the medium/high voltage (MV/HV) power grid. The proposed decentralized control is fully free of communication links and phase-locked loop (PLL). All cascaded inverters are controlled as current controlled voltage sources locally and independently to achieve maximum power point tracking (MPPT) and frequency self-synchronization with the power grid. As a result, control complexity as well as communication costs are reduced, and the system’s reliability is greatly enhanced compared with existing communication-based methods. System stability and dynamic performance are evaluated by small-signal analysis to guide the design of system parameters. The feasibility and effectiveness of the proposed solution are verified by simulation tests.

Suggested Citation

  • Mei Su & Chao Luo & Xiaochao Hou & Wenbin Yuan & Zhangjie Liu & Hua Han & Josep M. Guerrero, 2018. "A Communication-Free Decentralized Control for Grid-Connected Cascaded PV Inverters," Energies, MDPI, vol. 11(6), pages 1-18, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1375-:d:149436
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    References listed on IDEAS

    as
    1. Muxuan Xiao & Qianming Xu & Honglin Ouyang, 2017. "An Improved Modulation Strategy Combining Phase Shifted PWM and Phase Disposition PWM for Cascaded H-Bridge Inverters," Energies, MDPI, vol. 10(9), pages 1-14, September.
    2. Hua Han & Lang Li & Lina Wang & Mei Su & Yue Zhao & Josep M. Guerrero, 2017. "A Novel Decentralized Economic Operation in Islanded AC Microgrids," Energies, MDPI, vol. 10(6), pages 1-18, June.
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    Citations

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    Cited by:

    1. Yeuntae Yoo & Gilsoo Jang & Jeong-Hwan Kim & Iseul Nam & Minhan Yoon & Seungmin Jung, 2019. "Accuracy Improvement Method of Energy Storage Utilization with DC Voltage Estimation in Large-Scale Photovoltaic Power Plants," Energies, MDPI, vol. 12(20), pages 1-15, October.
    2. Luigi Costanzo & Massimo Vitelli, 2019. "A Novel MPPT Technique for Single Stage Grid-Connected PV Systems: T4S," Energies, MDPI, vol. 12(23), pages 1-13, November.
    3. Xiaoqiang Guo & Jianhua Zhang & Jiale Zhou & Baocheng Wang, 2018. "A New Single-Phase Transformerless Current Source Inverter for Leakage Current Reduction," Energies, MDPI, vol. 11(7), pages 1-12, June.
    4. Xiangwu Yan & Jiajia Li & Ling Wang & Shuaishuai Zhao & Tie Li & Zhipeng Lv & Ming Wu, 2018. "Adaptive-MPPT-Based Control of Improved Photovoltaic Virtual Synchronous Generators," Energies, MDPI, vol. 11(7), pages 1-18, July.
    5. Ahmed Al Mansur & Md. Ruhul Amin & Kazi Khairul Islam, 2019. "Performance Comparison of Mismatch Power Loss Minimization Techniques in Series-Parallel PV Array Configurations," Energies, MDPI, vol. 12(5), pages 1-21, March.

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