Aiming at the transient power angle destabilization and overcurrent problem when a virtual synchronous generator suffers from a severe fault, the transient power angle destabilization mechanism and faulty overcurrent causes of the VSG are analyzed in detail, and the impact of reactive droop coefficients on the transient stabilization of the VSG is also investigated to reveal the close connection between the power angle and current during faults. Then, an integrated control method of VSG transient stabilization considering fault overcurrent is proposed, which enhances the transient power angle stabilization by adaptively adjusting the active power command value, and suppresses the fault current by introducing an exponential attenuation factor in the reactive power control loop and a virtual inductor. Finally, the simulation verifies that the proposed control method can better meet the power angle stabilization and the fault current suppression requirements of the VSG during faults.

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Integrated Control of VSG Transient Stabilization Considering Fault Overcurrent

  • Yunguang Gao,
  • Jianpeng Ji,
  • Kailiang Sun,
  • Minjie Fan,
  • Peng Chen

摘要

Aiming at the transient power angle destabilization and overcurrent problem when a virtual synchronous generator suffers from a severe fault, the transient power angle destabilization mechanism and faulty overcurrent causes of the VSG are analyzed in detail, and the impact of reactive droop coefficients on the transient stabilization of the VSG is also investigated to reveal the close connection between the power angle and current during faults. Then, an integrated control method of VSG transient stabilization considering fault overcurrent is proposed, which enhances the transient power angle stabilization by adaptively adjusting the active power command value, and suppresses the fault current by introducing an exponential attenuation factor in the reactive power control loop and a virtual inductor. Finally, the simulation verifies that the proposed control method can better meet the power angle stabilization and the fault current suppression requirements of the VSG during faults.