The development of active controllable energy feedback device based on d-q model

In this paper introduced a design of the active controllable energy feedback device (ACEFD) based on dsPIC30F DSP and d-q controller. Through establishing the synchronous rotating coordinate system (dq) model, we may achieve the decoupling feed-forward control method; the advantages are discussed in the following paragraphs. We also analysis the inner current control model and calculate accurately the PI parameter in different condition. Then we developed a LCL filter for the active inverter, which can remarkably reduce the switching frequency ripple of the current, decrease the THD and reach for a lower electromagnetic interference (EMI).