Abstract
This paper deals with a versatile dc-connect voltage direct strategy of two-stage photo voltaic inverter with ZVT boost converter amid low voltage ride-through (LVRT) operation period. The dc-interface voltage should measure for taking after change of framework voltage amid the LVRT operation to keep up the high proportion so that the high recurrence sounds infused into the lattice can be lessened fundamentally. In addition, when enduring the unbalanced network errors, the proposed control technique could to some degree constrict the twofold line-recurrence dc-connect voltage swell to keep the dc-interface voltage in the safe operational range by moving the twofold line frequency control swell to the front-end dc input source, which can be accomplished by purposefully fluctuating the dc input control or utilizing a bidirectional dc-dc converter relying upon the voltage drop proportion and the information control level.
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