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Transition from Electromechanical Dynamics to Quasi-Electromechanical Dynamics Caused by Participation of Full Converter-Based Wind Power Generation

Author

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  • Jianqiang Luo

    (Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen 518057, China
    Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China)

  • Siqi Bu

    (Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen 518057, China
    Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China)

  • Jiebei Zhu

    (School of Electrical Automation and Information Engineering, Tianjin University, Tianjin 300072, China)

Abstract

Previous studies generally consider that the full converter-based wind power generation (FCWG) is a “decoupled” power source from the grid, which hardly participates in electromechanical oscillations. However, it was found recently that strong interaction could be induced which might incur severe resonance incidents in the electromechanical dynamic timescale. In this paper, the participation of FCWG in electromechanical dynamics is extensively investigated, and particularly, an unusual transition of the electromechanical oscillation mode (EOM) is uncovered for the first time. The detailed mathematical models of the open-loop and closed-loop power systems are firstly established, and modal analysis is employed to quantify the FCWG participation in electromechanical dynamics, with two new mode identification criteria, i.e., FCWG dynamics correlation ratio (FDCR) and quasi-electromechanical loop correlation ratio (QELCR). On this basis, the impact of different wind penetration levels and controller parameter settings on the participation of FCWG is investigated. It is revealed that if an FCWG oscillation mode (FOM) has a similar oscillation frequency to the system EOMs, there is a high possibility to induce strong interactions between FCWG dynamics and system electromechanical dynamics of the external power systems. In this circumstance, an interesting phenomenon may occur that an EOM may be dominated by FCWG dynamics, and hence is transformed into a quasi-EOM, which actively involves the participation of FCWG quasi-electromechanical state variables.

Suggested Citation

  • Jianqiang Luo & Siqi Bu & Jiebei Zhu, 2020. "Transition from Electromechanical Dynamics to Quasi-Electromechanical Dynamics Caused by Participation of Full Converter-Based Wind Power Generation," Energies, MDPI, vol. 13(23), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6270-:d:452581
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    References listed on IDEAS

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    1. Xia, S.W. & Bu, S.Q. & Zhang, X. & Xu, Y. & Zhou, B. & Zhu, J.B., 2018. "Model reduction strategy of doubly-fed induction generator-based wind farms for power system small-signal rotor angle stability analysis," Applied Energy, Elsevier, vol. 222(C), pages 608-620.
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    Cited by:

    1. Jianqiang Luo & Yiqing Zou & Siqi Bu & Ulas Karaagac, 2021. "Converter-Driven Stability Analysis of Power Systems Integrated with Hybrid Renewable Energy Sources," Energies, MDPI, vol. 14(14), pages 1-20, July.
    2. Lasantha Meegahapola & Siqi Bu, 2021. "Special Issue: “Wind Power Integration into Power Systems: Stability and Control Aspects”," Energies, MDPI, vol. 14(12), pages 1-4, June.

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