I. Introduction
Three-phase pulsewidth modulation (PWM) rectifiers have been widely investigated to improve control performance under different operating scenarios. PWM rectifiers offer multiple benefits, including bidirectional power flow, sinusoidal grid currents, and robust dc voltage regulation. Consequently, the use of PWM rectifiers is rising in applications, such as smart microgrids [1], renewable energy sources [2], energy storage systems [3], and unified power flow controllers [4]. However, in practice, power grids may experience nonideal conditions due to weak grids, faults, or unbalanced loads. To ensure high-performance PWM rectifier operation, control methods must be designed to handle both balanced and unbalanced grid voltages.