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Analysis of Transient Synchronous Stability Mechanism of Grid-following Voltage Source Converter Considering Outer Loop Control
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Chao XING1, Le-ke CHEN2, Lin ZHU2, *, Yang LIU2, Dong-rui LI2, Zun MA1
Science Technology and Engineering | 2025, 25(12) : 5013 - 5022
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Science Technology and Engineering | 2025, 25(12): 5013-5022
• Papers·Electrical Technology •
Analysis of Transient Synchronous Stability Mechanism of Grid-following Voltage Source Converter Considering Outer Loop Control
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Chao XING1, Le-ke CHEN2, Lin ZHU2, *, Yang LIU2, Dong-rui LI2, Zun MA1
Affiliations
  • 1 Electric Power Research Institute, Yunnan Power Grid Co. , Ltd. , Kunming 650217, China
  • 2 School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
Published: 2025-04-28 doi: 10.12404/j.issn.1671-1815.2404501
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With the transformation of the modern power system, the application of grid-connected inverters is increasing, and the transient synchronization stability of inverters after disturbance is becoming prominent. Previous research on transient synchronization stability mainly focuses on the dynamic of the phase-locked loop, with less consideration of the impact of outer loop control, resulting in a cognitive bottleneck in understanding transient synchronization mechanism. To address these issues, the grid-following voltage source inverter system was modelled, taking into account the inverter control strategy and limiting elements in detail. Subsequently, the impact of different voltage drops on the stability region of the equilibrium point was analyzed, and the effects of outer loop control proportional integral (PI) and limiting elements on transient synchronization were discussed. The influence mechanism of outer loop control on the transient synchronization stability of inverters was revealed systematically. Finally, the effectiveness of the proposed theory was verified in PSCAD/EMTDC.

transient synchronous stability  /  grid-following converter  /  phase-locked loop  /  outer loop control  /  limiter
Chao XING, Le-ke CHEN, Lin ZHU, Yang LIU, Dong-rui LI, Zun MA. Analysis of Transient Synchronous Stability Mechanism of Grid-following Voltage Source Converter Considering Outer Loop Control[J]. Science Technology and Engineering, 2025 , 25 (12) : 5013 -5022 . DOI: 10.12404/j.issn.1671-1815.2404501
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Year 2025 volume 25 Issue 12
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Article Info
doi: 10.12404/j.issn.1671-1815.2404501
  • Receive Date：2024-06-17
  • Online Date：2025-07-09
  • Published：2025-04-28
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  • Received：2024-06-17
  • Revised：2025-02-12
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Affiliations
    1 Electric Power Research Institute, Yunnan Power Grid Co. , Ltd. , Kunming 650217, China
    2 School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
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