A passivity based sliding mode controller design for microgrid considering delay and actuator saturation

A passivity based sliding mode controller structure is proposed in this paper for controlling the voltage and frequency of a microgrid for both islanded and grid connected mode. Effect of communication channel delay and actuator saturation is also considered. A sliding mode control law is derived in such a way that the overall system become passive. By selecting the appropriate Lyapunov function, the necessary criterion for the system to become passive is developed in terms of inequality. The usefulness of the designed controller is verified with the help of a three phase Subnetwork 1 of CIGRE benchmark medium voltage distribution network. The efficacy of the designed sliding mode based controller is verified for both grid connected and islanded mode. The simulation is performed in MATLAB/SIMULINK platform and the real-time simulation is performed using OPAL-RT.