Discrete time quasi-sliding mode-based control of LCL grid inverters

Application of a discrete time (DT) sliding mode controller (SMC) in the control structure primary three-phase LCL grid inverter is presented. The design side current loop performed using DT linear model with filter at output terminals. quasi-sliding was used due to its robustness external and parametric disturbances. Additionally, order improve disturbance compensation, compensator also implemented. Also, specific anti-windup mechanism has been implemented prevent large overshoots response case random disturbances voltages, or sudden changes commanded power. realized reference system synchronized voltage power grid. development digitally subsystem presented detail, starting from theoretical considerations, through computer simulations experimental tests. results confirm good static dynamic performance.