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Research on LVRT Control Strategy of Combined Grid-connected System with New Energy-Energy Storage Based on Grid-forming Converters
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Jiajun GUO1, Zhi XU2, 3, Baoyu ZHAI2, 3, Yutian CHEN1, Junru CHEN1
Electric Drive | 2024, 54(7) : 58 - 65
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Electric Drive | 2024, 54(7): 58-65
Research on LVRT Control Strategy of Combined Grid-connected System with New Energy-Energy Storage Based on Grid-forming Converters
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Jiajun GUO1, Zhi XU2, 3, Baoyu ZHAI2, 3, Yutian CHEN1, Junru CHEN1
Affiliations
  • 1 School of Electrical Engineering，Xinjiang University，Urumqi 830017，Xinjiang，China
  • 2 Electric Power Research Institute of State Grid Xinjiang Electric Power Co.，Ltd.，Urumqi 830001，Xinjiang，China
  • 3 Xinjiang Key Laboratory of Whole Process Simulation for Power System，Urumqi 830001，Xinjiang，China
Published: 2024-07-20 doi: 10.19457/j.1001-2095.dqcd24963
Outline
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Aiming at the low voltage ride through（LVRT）problem of the combined grid-connected system with new energy-energy storage under the control of the grid-forming converter，an additional voltage limiter control scheme based on the traditional LVRT was proposed. Firstly，the shortcomings of the traditional LVRT strategy based on current limitation was analyzed. When the fault duration is long，only setting current limitation would easily lead to synchronization instability. Then，an improved LVRT strategy with additional voltage limiter was proposed to suppress the fault current under a longer time scale and improve the synchronization stability under the fault. Finally，a simulation model of new energy-energy storage combined grid system was built in Matlab/Simulink to validate the proposed scheme. The experimental results show that the proposed scheme can ensure that the new energy-energy storage combined grid-connected system not be taken off-grid during the three-phase symmetrical sag fault，and effectively improved the synchronization stability of the system during the fault.

grid-forming converter  /  new energy-energy storage  /  low voltage ride through（LVRT）  /  voltage limiter  /  synchronization stability
Jiajun GUO, Zhi XU, Baoyu ZHAI, Yutian CHEN, Junru CHEN. Research on LVRT Control Strategy of Combined Grid-connected System with New Energy-Energy Storage Based on Grid-forming Converters[J]. Electric Drive, 2024 , 54 (7) : 58 -65 . DOI: 10.19457/j.1001-2095.dqcd24963
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Year 2024 volume 54 Issue 7
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Article Info
doi: 10.19457/j.1001-2095.dqcd24963
  • Receive Date：2023-02-18
  • Online Date：2025-12-09
  • Published：2024-07-20
Article Data
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History
  • Received：2023-02-18
  • Revised：2023-03-09
Funding
Affiliations
    1 School of Electrical Engineering，Xinjiang University，Urumqi 830017，Xinjiang，China
    2 Electric Power Research Institute of State Grid Xinjiang Electric Power Co.，Ltd.，Urumqi 830001，Xinjiang，China
    3 Xinjiang Key Laboratory of Whole Process Simulation for Power System，Urumqi 830001，Xinjiang，China
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