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This chapter establishes a general \([P Q]-[\omega V]\) model of a hybrid GFM/GFL multi-VSC system for power oscillation analysis, where the system structure is not limited to a special star topology. The general \([P Q]-[\omega V]\) models of VSCs under typical grid-forming and grid-following control schemes are comprehensively built. As a result, it could serve as a standard model that provides a convenient and universal tool for both the low and medium frequency (a few tenths to tens Hz) power oscillation analysis and stability analysis. Moreover, the presented model can locate the weak nodes with severe power oscillations and evaluate the effect of the oscillation suppression methods. To suppress the system medium frequency oscillation, a washout-filter coupling feedback (WFCF) control method is presented with more control freedom and improved dynamic performance. Finally, the control-hardware-in-loop (CHIL) experiment results verify the theoretical analysis.

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General [P Q]–[ \(\omega \) V] Modeling Method of Hybrid GFM/GFL Multi-VSC Systems

  • 章节

  • 发表日期：

    2025年

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  • Xiaochao Hou,
  • Yao Sun,
  • Siqi Fu,
  • Shimiao Chen,
  • Mei Su

摘要

This chapter establishes a general \([P Q]-[\omega V]\) model of a hybrid GFM/GFL multi-VSC system for power oscillation analysis, where the system structure is not limited to a special star topology. The general \([P Q]-[\omega V]\) models of VSCs under typical grid-forming and grid-following control schemes are comprehensively built. As a result, it could serve as a standard model that provides a convenient and universal tool for both the low and medium frequency (a few tenths to tens Hz) power oscillation analysis and stability analysis. Moreover, the presented model can locate the weak nodes with severe power oscillations and evaluate the effect of the oscillation suppression methods. To suppress the system medium frequency oscillation, a washout-filter coupling feedback (WFCF) control method is presented with more control freedom and improved dynamic performance. Finally, the control-hardware-in-loop (CHIL) experiment results verify the theoretical analysis.