Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2025 , Vol. 59 >Issue 2: 151 - 164

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.231

New Type Power System and the Integrated Energy

Frequency-Domain Modeling and Synchronization Perspective Interaction Mechanism of GFL-GFM Converter System

  • ZONG Haoxiang ,
  • ZHANG Chen ,
  • BAO Yanhong ,
  • WU Feng ,
  • CAI Xu
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  • 1. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, China

Received date: 2023-06-07

  Revised date: 2023-07-17

  Accepted date: 2023-07-31

  Online published: 2023-09-19

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Abstract

Aimed at the small-signal synchronization instability of grid-following (GFL) and grid-forming (GFM) converter system, a synchronization perspective frequency-domain modeling and analysis method is proposed, which can intuitively reveal mechanism and accurately judge multi-machine stability. Specifically, a node admittance matrix considering GFL, GFM converters, and the transmission network is established. Then, the frequency domain modal analysis (FMA) method is adopted to evaluate system instability characteristics. Afterwards, synchronization forward and feedback paths are partitioned at the oscillation source to formulate a synchronization perspective stability model incorporating dynamics of each converter and transmission network. Finally, the proposed method is validated by using a typical two-machine GFL-GFM system. With such method, the stability judgment failure caused by the feedback path aggregation is addressed, and the interaction mechanism between GFL and GFM synchronization dynamics as well as their parameter influences are revealed.

Key words： synchronization stability; grid-connected converter; grid-following (GFL) control; grid-forming (GFM) control; frequency domain modal analysis (FMA) method

Cite this article

ZONG Haoxiang , ZHANG Chen , BAO Yanhong , WU Feng , CAI Xu . Frequency-Domain Modeling and Synchronization Perspective Interaction Mechanism of GFL-GFM Converter System[J]. Journal of Shanghai Jiaotong University, 2025 , 59(2) : 151 -164 . DOI: 10.16183/j.cnki.jsjtu.2023.231

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