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Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters

Author

Listed:
  • Haijun Tao

    (School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China)

  • Yousong Zhou

    (School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China)

  • Guopeng Zhang

    (School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China)

  • Zheng Zheng

    (School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China)

Abstract

The resonance problem of multi-paralleled grid-connected inverters with inductance-capacitance-inductance (LCL) filters is a core matter which bothers the safety and stability operation of new energy distribution networks. Based on the impedance model of the paralleled system of two inverters, the influence of inverters on grid-connected current was analyzed through the superposition principle, and the grid-connected current was decomposed. The resonant mechanism generated by interactive current and the common current was studied, and the resonance frequency characteristics were compared and analyzed by a paralleled system using the same and differently rated power inverters. Based on the resonance frequency generated by interactive current, a digital notch filter was introduced into the traditional capacitance current active damping control scheme, which realized the non-static control of base wave signal and satisfied the standard of multi-paralleled grid-connected inverters with LCL filters. Finally, simulation results verified the correctness and validity of the proposed strategy.

Suggested Citation

  • Haijun Tao & Yousong Zhou & Guopeng Zhang & Zheng Zheng, 2019. "Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters," Energies, MDPI, vol. 12(9), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1656-:d:227396
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    References listed on IDEAS

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    1. 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.
    2. Jin-Hyuk Park & Kyo-Beum Lee, 2018. "Performance Improvement for Reduction of Resonance in a Grid-Connected Inverter System Using an Improved DPWM Method," Energies, MDPI, vol. 11(1), pages 1-16, January.
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    Cited by:

    1. Ramy Ali & Terence O’Donnell, 2022. "Analysis and Mitigation of Harmonic Resonances in Multi–Parallel Grid–Connected Inverters: A Review," Energies, MDPI, vol. 15(15), pages 1-30, July.

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