Influence of system delay on current controller stability and performance at grid-side inverter with LCL filter

This paper presents a brief overview of digital current control methods for three-phase grid-side inverters with the LCL filter.An analytical approach of modeling the LCL filter for the needs of the current regulator design is presented. The dependence of system performance on induced delay is shown, as well as following stability analysis. Digital current controllers based on grid or inverter sid...