Aiming at the problems of time delay and low prediction accuracy of traditional deadbeat control

a deadbeat current control based on composite prediction is proposed. This method first analyzes the reasons for the time delay and low prediction accuracy. Then

when the load is stable

Lagrange interpolation method and repeated prediction are combined to improve the current prediction accuracy. When the load changes

adaptive forward linear current prediction is introduced to shorten the system oscillation time and enhance the dynamic response ability. Finally

the two methods are combined for control. The inverter output current is predicted one beat in advance and the sampling reference current is predicted two beats in advance

which solves the problem of time delay. The simulation results show that this method reduces the harmonic content by 92% and the oscillation time by 50% compared with that before compensation. It has higher prediction accuracy and dynamic response ability

and better control effect.