A New Control Method of SMC for Three-Phase Grid-Connected Inverter with A-LCL Type Filter

In view of the shortcomings of the grid-connected inverter (GCI) with asymmetric LCL (A-LCL) type filtered using the traditional PR controller, this paper presents a new control method with sliding mode controller (SMC) using the Kalman filter estimation (KF-estimation) of the A-LCL-type filter. Firstly, this paper designs an SMC controller with the A-LCL filter GCI system. Secondly, for the SMC needs to get information about the system state variables, the Kalman filter estimator (KF-estimator) is used for estimating the required system state variables, reducing the number of sensors and saving costs. Finally, based on the Matlab/Simulink simulation platform, a 3-phase/6 kW/380V/A-LCL filtered GCI simulation model is built for verifying the robustness and anti-interference ability.