Control Parameter Design of Three-Phase Grid Connected Inverter Based on LCL Filter

This paper mainly studies the mathematical model and control strategy of three-phase grid connected inverter, established its mathematical models in
$abc$
three-phase static coordinate system,
$\alpha\beta$
two-phase static coordinate system and
$dq$
two-phase synchronous rotating coordinate system. Then analyzed its working principle and control strategy in detail, so as to lay a theoretical foundation for the research of control parameter design of three-phase grid connected inverter based on SPWM Control.