Fast Bus Voltage Control of Single-Phase Grid-Connected Converter With Unified Harmonic Mitigation

This paper presents a comprehensive analysis of the harmonic sources single-phase grid-connected voltage source converter (VSC), which leads to an alternative approach for DC bus control VSC under grid distortion with significant switching dead time. A selective current controller zero-reference structure plays vital role in rejecting components reference created by loop and caused Therefore, can adopt conventional proportional-integral regulator tuned at fast bandwidth. The proposed scheme implemented multiple unbalanced synchronous frames was validated bidirectional 2-kVA Furthermore, exhibited transient response quality superior methods notch filter low-pass filter. has inherent frequency adaption.