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Small Signal Modeling and Stability Analysis of Modular Multilevel Converter Based on Harmonic State-Space Model

Author

Listed:
  • Nian Mei

    (State Grid Economic and Technological Research Institute CO.LTD, Beijing 102209, China)

  • Shiyuan Yin

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Yue Wang

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Zhuling Li

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Pengkun Li

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Yonghui Liu

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Bo Yue

    (State Grid Economic and Technological Research Institute CO.LTD, Beijing 102209, China)

  • Zhenyu Li

    (State Grid Corporation of China, Beijing 100031, China)

Abstract

The stability of Modular multilevel converter (MMC) itself is the premise of analyzing the stability of MMC cascading with other cells, so this paper addressed the small-signal stability of MMC with dc voltage control mode which is the common operation mode of grid-side MMC in high-voltage direct current (HVDC) systems. First, the small signal model of MMC with open-loop control mode and dc voltage control mode while considering the dc voltage controller and current controller are established with the harmonic state-space (HSS) modeling method. Subsequently, eigenvalues and participation factors are analyzed to estimate the stability of MMC system and the influence of controller parameters, especially the proportional coefficients of dual-loop controllers, which can improve the design efficiency of control system. Finally, time-domain simulations in MATLAB/Simulink are provided to verify the accuracy of HSS small signal model and the effectiveness of the theoretical stability analysis.

Suggested Citation

  • Nian Mei & Shiyuan Yin & Yue Wang & Zhuling Li & Pengkun Li & Yonghui Liu & Bo Yue & Zhenyu Li, 2020. "Small Signal Modeling and Stability Analysis of Modular Multilevel Converter Based on Harmonic State-Space Model," Energies, MDPI, vol. 13(5), pages 1-22, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1056-:d:325745
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