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Control Method Based on Demand Response Needs of Isolated Bus Regulation with Series-Resonant Converters for Residential Photovoltaic Systems

Author

Listed:
  • Shu-Huai Zhang

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
    These authors contributed equally to this work.)

  • Feng-Zhang Luo

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
    These authors contributed equally to this work.)

  • Yi-Feng Wang

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
    These authors contributed equally to this work.)

  • Jiang-Hua Liu

    (Tianjin Research Institute of Electric Science Co., Ltd. (TRIED), Tianjin 300301, China
    These authors contributed equally to this work.)

  • Yong-Peng He

    (Tianjin Research Institute of Electric Science Co., Ltd. (TRIED), Tianjin 300301, China
    These authors contributed equally to this work.)

  • Yue Dong

    (Tianjin Research Institute of Electric Science Co., Ltd. (TRIED), Tianjin 300301, China
    These authors contributed equally to this work.)

Abstract

Considering the effects of isolation and high efficiency, a series-resonant DC-DC converter (L-L-C type, with two inductors and a capacitor) has been introduced into a residential photovoltaic (PV) generation and storage system in this work, and a voltage gain curve upwarp drifting problem was found. In this paper, the reason of upwarp drifting in the voltage gain curve is given, and a new changing topological control method to solve the voltage regulation problem under light load conditions is proposed. Firstly, the ideal and actual first harmonic approximation (FHA) models are given, and this drifting problem is ascribed to the multiple peaks of higher-order resonance between resonant tank and parasitic capacitors. Then the paper presents the pulse-frequency-modulation (PFM) driver signals control method to translate the full-bridge LLC into a half-bridge LLC converter, and with this method the voltage gain could easily be reduced by half. Based on this method, the whole voltage and resonant current sharing control methods in on-line and off-line mode are proposed. The parameters design and optimization methods are also discussed in detail. Finally, a residential PV system platform based on the proposed parallel 7-kW full-bridge LLC converter is built to verify the proposed control method and theoretical analysis.

Suggested Citation

  • Shu-Huai Zhang & Feng-Zhang Luo & Yi-Feng Wang & Jiang-Hua Liu & Yong-Peng He & Yue Dong, 2017. "Control Method Based on Demand Response Needs of Isolated Bus Regulation with Series-Resonant Converters for Residential Photovoltaic Systems," Energies, MDPI, vol. 10(6), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:6:p:752-:d:99874
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    References listed on IDEAS

    as
    1. Jae-Hyun Han & Young-Cheol Lim, 2015. "Design of an LLC Resonant Converter for Driving Multiple LED Lights Using Current Balancing of Capacitor and Transformer," Energies, MDPI, vol. 8(3), pages 1-20, March.
    2. Somi Jung & Dongwoo Kim, 2017. "Pareto-Efficient Capacity Planning for Residential Photovoltaic Generation and Energy Storage with Demand-Side Load Management," Energies, MDPI, vol. 10(4), pages 1-20, March.
    3. Tofael Ahmed & Tey Kok Soon & Saad Mekhilef, 2014. "A Single Phase Doubly Grounded Semi-Z-Source Inverter for Photovoltaic (PV) Systems with Maximum Power Point Tracking (MPPT)," Energies, MDPI, vol. 7(6), pages 1-24, June.
    4. Cheng-Tao Tsai & Chih-Lung Shen & Jye-Chau Su, 2013. "A Power Supply System with ZVS and Current-Doubler Features for Hybrid Renewable Energy Conversion," Energies, MDPI, vol. 6(9), pages 1-20, September.
    5. Jinhaeng Jang & Syam Kumar Pidaparthy & Byungcho Choi, 2015. "Current Mode Control for LLC Series Resonant DC-to-DC Converters," Energies, MDPI, vol. 8(6), pages 1-16, June.
    6. Youngjin Kim, 2017. "Modeling and Analysis of a DC Electrical System and Controllers for Implementation of a Grid-Interactive Building," Energies, MDPI, vol. 10(4), pages 1-21, March.
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    Cited by:

    1. HwaPyeong Park & DoKyoung Kim & SeungHo Baek & JeeHoon Jung, 2019. "Extension of Zero Voltage Switching Capability for CLLC Resonant Converter," Energies, MDPI, vol. 12(5), pages 1-14, March.

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