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Inertia Control Strategy of DFIG-Based Wind Turbines Considering Low-Frequency Oscillation Suppression

Author

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  • Haoming Liu

    (College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China)

  • Suxiang Yang

    (College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China)

  • Xiaoling Yuan

    (College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China)

Abstract

It has become a basic requirement for wind turbines (WTs) to provide frequency regulation and inertia support. The influence of WTs on the low-frequency oscillation (LFO) of the system will change after adopting inertia control methods. This paper intends to investigate and compare in detail the IC effects on LFO characteristics in two systems with different structures. First, the mechanism of inertia control of doubly fed induction generator (DFIG)-based WTs is analyzed. Then, the small-signal analysis method and modal analysis method are used to study the influence of the inertia control on the LFO characteristics based on the two-machine infinite-bus system and the four-machine two-area system, respectively. The difference in impact rules of IC on LFO is compared in detail. Finally, considering that the inertia control might worsen the LFO in some systems, an improved inertia control strategy of DFIG-based WTs is proposed to suppress the LFO. The simulation results demonstrate that, in systems with different structures, the impact rules of the inertia control parameters on LFO are different. With the improved inertia control strategy, DFIG-based WTs can suppress the LFO of the system and provide inertia support for the system.

Suggested Citation

  • Haoming Liu & Suxiang Yang & Xiaoling Yuan, 2021. "Inertia Control Strategy of DFIG-Based Wind Turbines Considering Low-Frequency Oscillation Suppression," Energies, MDPI, vol. 15(1), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:15:y:2021:i:1:p:29-:d:707884
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    References listed on IDEAS

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    1. Xiangwu Yan & Xuewei Sun, 2020. "Inertia and Droop Frequency Control Strategy of Doubly-Fed Induction Generator Based on Rotor Kinetic Energy and Supercapacitor," Energies, MDPI, vol. 13(14), pages 1-19, July.
    2. Changgang Li & Zhi Hang & Hengxu Zhang & Qi Guo & Yihua Zhu & Vladimir Terzija, 2020. "Evaluation of DFIGs’ Primary Frequency Regulation Capability for Power Systems with High Penetration of Wind Power," Energies, MDPI, vol. 13(23), pages 1-19, November.
    3. Hector Beltran & Sam Harrison & Agustí Egea-Àlvarez & Lie Xu, 2020. "Techno-Economic Assessment of Energy Storage Technologies for Inertia Response and Frequency Support from Wind Farms," Energies, MDPI, vol. 13(13), pages 1-21, July.
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    Cited by:

    1. Antonio Pepiciello & José Luis Domínguez-García & Alfredo Vaccaro, 2022. "The Impact of Frequency Support by Wind Turbines on the Small-Signal Stability of Power Systems," Energies, MDPI, vol. 15(22), pages 1-20, November.

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