Cascade H-bridge converter with carrier phase shifted sinusoidal pulse-width modulation (CPS-SPWM) technique is proposed. For a combination of cascade Hbridge topological structure and CPS-SPWM technique

this type of converter possesses the both merits and a good application prospect in the large power converter domain. This paper gives the implementation of Cascade H-bridge converter with CPS-SPWM

and applies it in shunt active power filter (APF). Furthermore

the closed-loop control principle of DC side voltage is verified. Simulated and experimental results show good performances of the proposed APF

which can compensate the harmonic and reactive current correctly and validly under low switching frequency conditions.