【Objective】In order to improve the poor anti-interference ability, sensitivity to parameter changes, and high harmonic content of the PETT rectifier stage under traditional dq current decoupling double closed-loop control in order to improve the problem.【Method】By improving the decoupling method of DPC, a power decoupling controller based on ADRC was proposed, without requiring system angular frequency and inductance parameters. Finally, a model was built in Matlab/Simulink for simulation analysis under different operating conditions.【Result】The simulation results showed that the new control strategy reduced the THD value of the grid side current by 5.38% compared to the traditional control strategy, reduced the voltage drop value by 48 V when the equivalent induct-ance suddenly changed, and reduced the voltage drop value by 14 V when the voltage frequency shifted.【Conclusion】This controller achieves precise and independent control of active and reactive power through decoupling. The new control strategy has good balance control effect under load sudden change and load im-balance conditions. The simulation results verify the rationality and effectiveness of the proposed control strategy