Method for controlling a grid-connected boost-buck full-bridge current-source inverter cascade for photovoltaic applications and device

摘要

A method and an apparatus for controlling a grid-connected converter (10) comprising a boost converter, a buck converter (12), and a current source inverter (13) comprising an output CL filter (132), wherein a buck converter (12) input is connected to a boost converter output (11), and a current source inverter (13) input is connected to the buck converter (12) output. The method comprises controlling a boost converter (11) input voltage, controlling a boost converter (12) output voltage through control of a buck converter (12) output voltage (v), and controlling the current source inverter (13) to produce an AC current from the buck converter output voltage (v). The apparatus implements the method.