Full-order Terminal Sliding mode Control for Virtual Synchronous Generator based Inverter

A full-order terminal sliding mode (FTSM) control strategy is proposed in this paper for the virtual synchronous generator (VSG) based inverter. VSG is designed for micro-grid to provide stable power to the grid or maintain stable operation in island state. The variable and nonlinear characteristics of micro-grid demand the voltage control scheme must satisfy with VSG power loop, and the control strategy should have strong robustness to resistant the external disturbance and parameters perturbance. FTSM can enhance the robustness and tracking speed of the system. Besides, the FTSM control strategy could reduce chattering problems caused by high-frequency switching. Simulations by MATLAB/Simulink show that the VSG algorithm combined with the FTSM control strategy can significantly enhance the output efficiency of the inverter, improve the output of the inverter, and deal with the load fluctuation.