The large-scale wind power grid connection makes the random and fluctuation of the system increase further. The traditional control modes that only conventional units participate in primary frequency modulation will make the system frequency have no way to meet the safety requirements. Therefore

on this basis

the day-ahead dispatching model of steady-transient coordination optimization is set up with consideration of simultaneous participation of primary frequency regulation of system by the large scale wind power and the interruptible load of the demand side in this paper. The New England 10 generator 39 node system is selected as an example in this paper to analyze whether wind power participates in primary frequency regulation and the influence of interruptible load capacity on system unit commitment results and frequency regulation benefits. The research shows that the participation of large-scale wind power and demand side interruptible load will improve the system frequency safety further.