Journal of Modern Power Systems and Clean Energy

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Home > Archive>Volume 13, Issue 1, 2025 >142-153. DOI:10.35833/MPCE.2024.000684
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Virtual Power Angle Synchronous Control for Improving Transient Stability of Grid-forming Converters
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Affiliation:

1.School of Electric Power Engineering, South China University of Technology, Guangzhou510640, China;2.School of Automation Science and Engineering, South China University of Technology, Guangzhou510641, China

Fund Project:

This work was supported in part by the National Natural Science Foundation of China (No. 52377186), the Natural Science Foundation of Guangdong Province (No. 2024A1515012428), the Science and Technology Planning Project of Guangdong Province, China (No. 2023A1111120023), and the Basic and Applied Basic Research Foundation of Guangdong Province (No. 2022A1515240026).

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    Abstract:

    The increasing adoption of grid-forming converters (GFMCs) stems from their capacity to furnish voltage and frequency support for power grids. Nevertheless, GFMCs employing the current reference saturation limiting method often exhibit instability during various transient disturbances including grid voltage sags, frequency variations, and phase jumps. To address this problem, this paper proposes a virtual power angle synchronous (δv-SYN) control method. The fundamental of this method is to achieve synchronization with the grid using the virtual power angle δv instead of the active power. The transient stability characteristics of the proposed method are theoretically elucidated using a novel virtual power angle-power angle (δv-δ) model. The key benefit of the proposed method is its robustness to various grid strengths and diverse forms of transient disturbances, eliminating the requirement for fault identification or control switching. Moreover, it can offer grid-forming support to the grid during grid faults. Hardware-in-the-loop experimental results validate the theoretical analysis and the performance of the proposed method.

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History
  • Received:June 28,2024
  • Revised:September 23,2024
  • Online: January 24,2025

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