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Lyapunov-Based Large Signal Stability Assessment for VSG Controlled Inverter-Interfaced Distributed Generators

Author

Listed:
  • Meiyi Li

    (Shanghai Jiao Tong University, Shanghai 200240, China)

  • Wentao Huang

    (Shanghai Jiao Tong University, Shanghai 200240, China)

  • Nengling Tai

    (Shanghai Jiao Tong University, Shanghai 200240, China)

  • Moduo Yu

    (Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract

Inverter-interfaced distributed generators (IIDGs) have been widely applied due to their control flexibility. The stability problems of IIDGs under large signal disturbances, such as large load variations and feeder faults, will cause serious impacts on the system. The virtual synchronous generator (VSG) control is an effective scheme for IIDGs to increase transient stability. However, the existing linearized stability models of IIDGs are limited to small disturbances. Hence, this paper proposes a Lyapunov approach based on non-linearized models to assess the large signal stability of VSG-IIDG. The electrostatic machine model is introduced to establish the equivalent nonlinear model. On the basis of Popov’s theory, a Lyapunov function is derived to calculate the transient stability domain. The stability mechanism is revealed by depicting the stability domain using the locus of the angle and the angular frequency. Large signal stability of the VSG-IIDG is quantified according to the boundary of the stability domain. Effects and sensitivity analysis of the key parameters including the cable impedance, the load power, and the virtual inertia on the stability of the VSG-IIDG are also presented. The simulations are performed in PSCAD/EMTDC and the results demonstrate the proposed large signal stability assessment method.

Suggested Citation

  • Meiyi Li & Wentao Huang & Nengling Tai & Moduo Yu, 2018. "Lyapunov-Based Large Signal Stability Assessment for VSG Controlled Inverter-Interfaced Distributed Generators," Energies, MDPI, vol. 11(9), pages 1-15, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2273-:d:166451
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    Cited by:

    1. Daniel Carletti & Arthur Eduardo Alves Amorim & Thiago Silva Amorim & Domingos Sávio Lyrio Simonetti & Jussara Farias Fardin & Lucas Frizera Encarnacao, 2020. "Adaptive Armature Resistance Control of Virtual Synchronous Generators to Improve Power System Transient Stability," Energies, MDPI, vol. 13(9), pages 1-17, May.
    2. Antonio Rosales & Pedro Ponce & Hiram Ponce & Arturo Molina, 2019. "A Robust Control Scheme for Renewable-Based Distributed Generators Using Artificial Hydrocarbon Networks," Energies, MDPI, vol. 12(10), pages 1-18, May.
    3. Haifeng Liang & Yuxi Huang & Hao Sun & Zhiqian Liu, 2019. "Research on Large-Signal Stability of DC Microgrid Based on Droop Control," Energies, MDPI, vol. 12(16), pages 1-14, August.
    4. Bahram Shakerighadi & Esmaeil Ebrahimzadeh & Frede Blaabjerg & Claus Leth Bak, 2018. "Large-Signal Stability Modeling for the Grid-Connected VSC Based on the Lyapunov Method," Energies, MDPI, vol. 11(10), pages 1-16, September.

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