Although traditional droop control is used for paralleled voltage source inverters in distributed generation microgrid

it can’t effectively eliminate reactive power allocation errors. In this paper

an improved droop control strategy is proposed using recursive least-squares（RLS）algorithm. Firstly

information of AC bus voltage is sent to local controller through one way low-bandwidth communication to acquire accurate power equivalent impedance calculated locally by on-line RLS algorithm. Then

based on the power equivalent impedance concept

influence of mismatch of feeder and local load to the power allocation is considered. A good power sharing performance can be achieved using virtual impedance calculated to compensate mismatch of power feeding parameters. MATLAB sim-ulation results indicate that the proposed methods can response to local load change rapidly and both power allo-cation performance and transient performance are better than traditional droop control.