Due to the coupling between the active and reactive power output of VSG affects its final voltage and frequency regulation ability

and in severe cases

can cause system instability

this article adopts a decoupling strategy based on diagonal matrix compensation matrix to achieve static power decoupling of VSG

and introduces an optimized decoupling scheme based on power angle estimation to address the drawback of decoupling performance being affected by the operating point of the system. Finally

the effectiveness of the relevant control is verified through simulation.