For the needs of friendly accession of microgrid to high-performance grid-connected interface,a new type of grid-connected interface based on flexible converter is proposed in this paper. To enable the grid-connected interface to work efficiently and effectively, an approach to detect compensative current based on instantaneous reactive power theory is given, and the corresponding DC side voltage and constant reactive power control strategy are presented. Furthermore, a hysteresis current controller based on weighted current feedback is also given. Finally, by simulation on Matlab/simulink pla...
