POWER OPTIMIZER, AND ITS METHOD OF CONTROL METHOD OF PV GRID CONNECTED SYSTEM USING THEREOF

摘要

Disclosed are a power optimizer used in a photovoltaic power generation system, and a method for controlling an initial operation and a regular operation of the power optimizer. The power optimizer of the present invention includes a dual-bridge LLC resonant converter and a PI controller, and the dual-bridge LLC resonant converter includes a full-bridge unit including four switches (switch 1, switch 2, switch 3, and switch 4); Provided are a power optimizer including a half-bridge unit including two switches (switch 5 and switch 6), and an initial and constant operation control method thereof.