Abstract: Aiming at the power electronics development trend of power system,on the condition of DC bus voltage stability,this paper designed a PQ control strategy for grid-connected voltage inverter based on the axial voltage regulation control grid-connected inverter model,and the paper presented its small signal modeling and controller parameter analysis.The PQ control strategy combines with the droop control characteristics,so the inverter possesses characteristics of primary voltage regulation and frequency regulation,which make the inverter participating in the voltage and frequency regulation of micro-network and play a certain supporting role for power network,therefore,optimized operation between distributed power generation and power systems is realized.At the same time,through reasonable parameter design,the output impedance of the inverter is only related to the control parameters and the filter inductance L2 of the grid side,and active and reactive power loops are decoupled by regulating the output reactance X is much greater than the output resistance R,hence power interaction between the inverter and the grid system was completed.Finally,the validity and feasibility of the proposed control strategy were verified by theoretical analysis,simulation and experimental results.