Verification of variable carrier deadbeat control with digital hysteresis method using SoC-FPGA for utility interactive inverter for FRT conditions

Variable carrier frequency control of PWM inverter based on deadbeat control using SoC-FPGA based hardware controller was proposed. To adopt to the fault ride through (FRT) conditions, deadbeat control was introduced to control the output current, and variable carrier method was applied to achieve high efficiency without the deterioration of controllability of the output current. The disturbance compensator was also implemented to achieve the superior tracking accuracy to the reference current. Design concept of SoC-FPGA based hardware controller was described and the verifications of the proposed method were carried out through simulations and experiments.