基于开关电容的UPS系统中双倍工频电流纹波的抑制

This article proposes a new approach for dc-link second-order harmonic power cancellation in an online uninterruptible power supply based on a single-phase switched-capacitor dc/ac converter. The proposed topology has only one-stage power conversion from ac to dc to ac. The inverter output voltage contains five levels and the magnitude comes with a boost functionality. It has an advantage over the...