A compensation strategy using doubly-fed induction generator (DFIG) to rebalance the voltage at point of common coupling (PCC) is proposed. By tuning the decoupling controller based on the estimated network impedance

d-q components of the negative sequence voltage at PCC is decoupling controlled

which gives the DFIG system good stability and fast response under arbitrary network impedance ratio. The design principles of the proposed strategy is introduced in detail

then the closed loop transfer function of a DFIG system utilizing the proposed strategy is derived

and the loci of the closed loop poles with varying network impedance ratio are plotted

with which the impact of the network impedance estimation error on the system performance is analyzed. Simulation model is built to compare the control performance of the traditional non-decoupling strategy and the proposed decoupling strategy. Finally

experiments on a prototype validate the effectiveness and superiority of the proposed strategy. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2011AA050204).