In view of the problem that power generating unit will shut down due to the drop of the stationservice voltage, low voltage ride through (LVRT) device based on the inverter DC bus voltage compensation was designed. For the auxiliary inverter, direct torque control was adopted. For the main circuit of the LRVT device, ternary staggered parallel boost converter structure was used, which maintained the DC bus voltage stability during the voltage drop and reduced the high frequency ripple of the output current. Considering the current balancing problem of the parallel modules caused by parameter difference, current balancing loop was added to the outer loop of the traditional voltage and current doubleclosedloop control, so that the circulating current was eliminated and the current stress of switch devices was more balanced. Because of the nonlinear and strong coupling characteristics of the control system, conventional PI controller was limited, so fuzzy control algorithm was used to optimize the parameters of PI controller. Finally, simulation was carried out to prove the proposed method.