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Transient Stability Analysis of Grid-Connected Converter Driven by Imbalance Power under Non-Severe Remote Voltage Sag

Author

Listed:
  • Xuli Quan

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology (AEET), School of Electrical and Electronic Engineering (SEEE), Huazhong University of Science and Technology (HUST), Wuhan 430074, China)

  • Xinchun Lin

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology (AEET), School of Electrical and Electronic Engineering (SEEE), Huazhong University of Science and Technology (HUST), Wuhan 430074, China)

  • Yun Zheng

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology (AEET), School of Electrical and Electronic Engineering (SEEE), Huazhong University of Science and Technology (HUST), Wuhan 430074, China)

  • Yong Kang

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology (AEET), School of Electrical and Electronic Engineering (SEEE), Huazhong University of Science and Technology (HUST), Wuhan 430074, China)

Abstract

In the transient process of the grid-connected converter (GCC), the existing research mainly focuses on the impact of the control loops. Little attention is paid to the transient stability issues driven by the imbalance between the input power and output power of GCC. This paper shows that the transient stability issues will still exist even if ignoring the dynamics of phase-locked loop (PLL) and current loop. In this paper, the models of the AC grid and the GCC are built under the assumption that the dynamics of the PLL and current loop are ignored. Then, by analyzing the transient process of GCC under non-severe remote voltage sag, the effects of the imbalance power on the transient stability of GCC are discussed. Moreover, for the GCC to operate stably after the transient process, there should be a maximum input power limit (MIPL) for GCC, and the imbalance power equation is applied in this paper to determine the transient stability of GCC. Furthermore, the effects of the current limitation on the transient stability of the GCC are also discussed. Finally, the theoretical analysis has been verified by means of simulations.

Suggested Citation

  • Xuli Quan & Xinchun Lin & Yun Zheng & Yong Kang, 2021. "Transient Stability Analysis of Grid-Connected Converter Driven by Imbalance Power under Non-Severe Remote Voltage Sag," Energies, MDPI, vol. 14(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:6:p:1737-:d:521277
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    Cited by:

    1. Xiaodan Cui & Jialong Wu & Xiaoke Liu & Yandong Chen & Zhiwei Xie & Feng Xue & Yucheng Liu & Cong Luo, 2023. "Large-Signal Impedance Modeling and Stability Analysis of a Grid-Connected Inverter Considering the Influence of a Limiter in Different Control Links," Energies, MDPI, vol. 16(17), pages 1-17, August.

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