Terminal Sliding Mode Control Approach of DC/AC Voltage Source Inverters in Balanced 3-Phase 3-Wire Grid*

This paper proposes a novel terminal sliding mode control (TSMC) method for grid-connected voltage source inverters (VSIs) in balanced three-phase three-wire grids. First, the mathematical model of the VSI is built. Then a double-loop TSMC controllers are presented for the DC-link voltage and the grid current respectively. The TSMC approach ensures stable and efficient VSI operation, effectively handling uncertainties and disturbances, and incorporates an LCL filter to enhance harmonic performance and overall power quality. Theoretical analysis and simulation studies validate the effectiveness and superiority of the proposed TSMC method.