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The Interaction Stability Analysis of a Multi-Inverter System Containing Different Types of Inverters

Author

Listed:
  • Chen Zheng

    (State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China)

  • Qionglin Li

    (State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China)

  • Lin Zhou

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

  • Bin Li

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

  • Mingxuan Mao

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

Abstract

The existing stability investigations of the system containing different types of inverters are insufficient. The paper aims to reveal the more universal interaction stability mechanism of the system containing different types of inverters. Firstly, the multi-inverter system is decomposed into an admittance network (AN) and excitation sources. Then, the interaction between two different inverters, as well as the interaction between the inverter and the power grid, are analyzed by the root locus method. This reveals that the stability of the interaction between the inverter and the power grid is exclusively determined by AN. However, the stability of the interaction between different inverters not only depends on AN but also relies on whether the two inverters have common right-half plane (RHP) poles. To make the multi-inverter system stable, the following two criteria must be satisfied: (a) AN is stable and (b) any two different inverters do not have the same RHP poles. If criterion (a) is not satisfied, the harmonic resonance will arise in all currents. Resonant harmonics will only circulate among partial inverters and will not inject into the power grid if criterion (a) is satisfied but criterion (b) is not satisfied. Theoretical analysis is validated by simulation and experiment results.

Suggested Citation

  • Chen Zheng & Qionglin Li & Lin Zhou & Bin Li & Mingxuan Mao, 2018. "The Interaction Stability Analysis of a Multi-Inverter System Containing Different Types of Inverters," Energies, MDPI, vol. 11(9), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2244-:d:165957
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    References listed on IDEAS

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    1. Yanxue Yu & Haoyu Li & Zhenwei Li & Zhou Zhao, 2017. "Modeling and Analysis of Resonance in LCL-Type Grid-Connected Inverters under Different Control Schemes," Energies, MDPI, vol. 10(1), pages 1-17, January.
    2. Marian Liberos & Raúl González-Medina & Gabriel Garcerá & Emilio Figueres, 2017. "Modelling and Control of Parallel-Connected Transformerless Inverters for Large Photovoltaic Farms," Energies, MDPI, vol. 10(8), pages 1-25, August.
    3. Iman Lorzadeh & Hossein Askarian Abyaneh & Mehdi Savaghebi & Alireza Bakhshai & Josep M. Guerrero, 2016. "Capacitor Current Feedback-Based Active Resonance Damping Strategies for Digitally-Controlled Inductive-Capacitive-Inductive-Filtered Grid-Connected Inverters," Energies, MDPI, vol. 9(8), pages 1-32, August.
    4. Xing Li & Hua Lin, 2018. "Stability Analysis of Grid-Connected Converters with Different Implementations of Adaptive PR Controllers under Weak Grid Conditions," Energies, MDPI, vol. 11(8), pages 1-17, August.
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