Decoupling Control Strategy of D-STATCOM

In distribution network,Distribution Static Synchronous Compensator(D-STATCOM) can stable access point voltage,reduce the net loss rate effectively and improve the power factor and prevent the nonlinear load.In d-and q-axis.D-STATCOM is a non-linear,strong coupling system,so decoupling control is very useful,because the decoupling control can ensure the output current fast without poor track setting value.Study the decoupling control strategy of D-STATCOM,through the analysis of its basic structure,which has the model of the coupling term linear decoupling.Fuzzy immune PI control and feed-forward decoupling control strategy are combined together to achieve active and reactive current decoupling.Finally,use the MATLAB simulation,the results show that the proposed decoupling control strategy is performance、the structure is simple and easy to implement.