Parameter optimization method and system based on multi-virtual synchronous generator parallel grid-connected system

The invention relates to a parameter optimization method and system based on a multi-virtual synchronous generator parallel grid-connected system. The method comprises the following steps: S1, performing Lyapunov indirect method criterion on a small signal model of the multi-virtual synchronous generator parallel grid-connected system containing a control link; s2, calculating a damping ratio and a real feature root according to the small signal state matrix; s3, constructing a dynamic evaluation function according to the stability and dynamic characteristics of the system; s4, giving a weight to the dynamic evaluation function by using an entropy weight method; and S5, judging the optimal solution of the evaluation function by using a quasi-annealing particle swarm algorithm. According to the method, the dynamic performance evaluation function is constructed for the multi-virtual synchronous generator parallel grid-connected system, so that the influence of parameters on the system is better evaluated; an en