Grid-forming PV exhibits voltage source characteristics and is highly adaptable to the grid. In this paper

the impedance small-signal model of grid-forming photovoltaics based on DC voltage synchronisation is established

and the stability of grid-forming photovoltaics is investigated by impedance analysis. On the basis of stability analysis this paper proposes an optimal control strategy for the stability of grid-forming PV based on DC voltage feed forward

and comparatively analyses the stability of the improved grid-forming PV. Finally

this paper verifies the effectiveness of the control strategy proposed in this paper and the correctness of the theoretical analysis through controller hardware-in-the-loop experiments.