The proposed method can smoothly exit the power matching mode without causing power fluctuation. Grid forming (GFM) converter mimics the operational characteristics of the synchronous generator, serves as a voltage source that provides voltage and frequency support to the power system.
To avoid overcurrent issues, a power matching based current limitation method for GFM converter is proposed. The proposed method can avoid instability while limiting GFM converter current. The proposed method can smoothly exit the power matching mode without causing power fluctuation.
The paper proposes a power matching based current limitation method for GFM converter under large disturbances, which can efficiently limit the output current to the maximum allowable value and avoid the instability issue caused by the CRL. Detailed conclusions are given below.
Therefore, to prevent the power angle from fluctuating widely and reduce the risk of overcurrent, the reference power P ref given by the control strategy is expected to be essentially matched with the output power P, meaning that their deviation (P ref P) is within a reasonable interval.
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